WO2007142192A1 - 多孔質酸化カルシウム粒状物及び多孔質水酸化カルシウム粒状物 - Google Patents
多孔質酸化カルシウム粒状物及び多孔質水酸化カルシウム粒状物 Download PDFInfo
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- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
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- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28078—Pore diameter
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28088—Pore-size distribution
- B01J20/28092—Bimodal, polymodal, different types of pores or different pore size distributions in different parts of the sorbent
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
- C01F11/04—Oxides or hydroxides by thermal decomposition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/202—Single element halogens
- B01D2257/2027—Fluorine
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- C—CHEMISTRY; METALLURGY
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2006/12—Surface area
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/16—Pore diameter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- the present invention relates to porous acid-calcium particles and hydroxide-calcium particles.
- Acid calcium (quick lime) and calcium hydroxide (slaked lime) are highly reactive with acids, so acids such as hydrogen fluoride gas, hydrogen chloride gas, sulfur dioxide gas, carbon dioxide gas, etc. It is used as an adsorbent for reactive gases.
- acids such as hydrogen fluoride gas, hydrogen chloride gas, sulfur dioxide gas, carbon dioxide gas, etc. It is used as an adsorbent for reactive gases.
- calcium carbonate is also used as a hygroscopic material because of its high reactivity with water.
- calcium oxide or calcium hydroxide is used as a CxFy gas (eg, CF, CF gas, etc.) used in the semiconductor device manufacturing process, halide gas such as SiF gas, or decomposition products thereof.
- a semiconductor substrate in this specification, a substrate of a semiconductor material, a substrate in which a film of a semiconductor material is provided on a substrate such as an insulator, and the like on these substrates.
- a structure in which one or more insulator material coatings, semiconductor material coatings, and one or more Z or conductor material coatings are provided is collectively referred to as a “semiconductor substrate”) semiconductor material, insulator material, or conductor It should be used in processes that selectively etch materials, processes that form CF films on CVD on semiconductor substrates, and processes that clean unnecessary deposits that adhere to the inner wall of the chamber after the CVD process. means.
- Patent Document 1 as a method for treating halide gas contained in exhaust gas exhausted in a semiconductor device manufacturing facility, halide gas is treated with plasma under reduced pressure to be in an excited state. After that, the mixture is brought into contact with the granular material (reaction removal material) having a mixed force of acid calcium or hydroxide and acid calcium and hydroxide calcium hydroxide charged in the reaction cylinder under reduced pressure.
- reaction removal material granular material having a mixed force of acid calcium or hydroxide and acid calcium and hydroxide calcium hydroxide charged in the reaction cylinder under reduced pressure.
- Patent Document 2 discloses that a fluorocarbon gas is heated and decomposed under heating with acid-aluminum particulates and an alkaline earth metal oxide (eg, calcium carbonate). Alkaline earth A method for decomposing fluorocarbon gas in contact with a mixture of a metal compound (eg, calcium hydroxide) with a granular material is disclosed.
- a metal compound eg, calcium hydroxide
- Patent Document 3 as a highly reactive acid calcium, when producing acid calcium by baking calcium hydroxide, the BET specific surface area of the calcium hydroxide used as a raw material, and its baking temperature, the baking time and ambient pressure, was produced by setting so that each satisfy a specific relationship, BET specific surface area in 30 m 2 Zg above, and a total pore volume 1. 0 X 10- 4 dm 3 / g or more Acid calcium is disclosed. Patent Document 3 describes that it is important that the total pore volume is large together with the BET specific surface area for the hydration reactivity of acid calcium and the reactivity with acidic gas.
- the one with the largest BET specific surface area is 56.2 m 2 / g, and the total pore volume is 0.18 ⁇ 10— 4 dm 3 / g (0.018 mL / g).
- Patent Document 4 granules obtained by granulating calcium hydroxide powder having a particle size of 300 ⁇ m or less are heated at a temperature of 390 ° C and 480 ° C for at least 5 minutes under normal pressure. A calcium oxide porous body produced by firing under such conditions is disclosed!
- the example of Patent Document 4 discloses a calcium oxide porous material that is granulated into cylindrical granules having a BET specific surface area of more than 50 m 2 Zg and a diameter of 3 mm and a length of 3 mm.
- this patent document 4 shows the specific values for the pore volume! /, N! /.
- Patent Document 5 describes a cylindrical calcium hydroxide porous particle force produced by an extrusion method using a binder as a calcium hydroxide granule having a high BET specific surface area and a large pore volume. Things are disclosed.
- a cylindrical hydroxy acid having a BET specific surface area of up to 34 m 2 Zg and a total pore volume of 0.2 to 240 mLZg in the range of diameter 2 to LOOnm ⁇ Calcium granules are described.
- Patent Document 6 relates to calcium hydroxide powder, and this patent document describes all pores having a BET specific surface area of 30 m 2 Zg or more and a diameter of 2 to LOONm. Fine A calcium hydroxide powder having a pore volume of 0.30 mLZg or more is described.
- Patent Document 1 International Publication No. 2005Z072852 Pamphlet
- Patent Document 2 Japanese Patent Laid-Open No. 2002-224565
- Patent Document 3 Japanese Unexamined Patent Publication No. 2006-21945
- Patent Document 4 Japanese Patent Laid-Open No. 7-149580
- Patent Document 5 Special Table 2002-516247
- Patent Document 6 Japanese Unexamined Patent Publication No. 2005-350343
- an object of the present invention is a particulate matter of calcium oxide and calcium hydroxide suitable for filling a reaction cylinder and used, in particular, reactivity with a halogenated gas or a decomposition product thereof. High is in providing things.
- the present inventor has obtained a high water content calcium hydroxide powder having a water content of 35 to 55% by mass prepared by mixing water with calcium hydroxide powder having a BET specific surface area of 30 m 2 / g or more.
- Granulation is carried out by agglomerating the particles by contacting the particles under rotation to obtain hydrous calcium hydroxide granules having a moisture content of 28 to 50% by mass, which is an aggregate of spherical hydrous porous particles. Then, the hydrous calcium carbonate granular material is slowly dried at a temperature of 100 to 250 ° C. for 5 hours or more until the water content becomes 0.5% by mass or less.
- porous acid calcium carbonate granule has a BET specific surface area of 50 m 2 Zg or more.
- the total pore volume of pores in the range of 2 to: LOOnm contained in all porous particles was as large as 0.40 to 0.70 mLZg.
- the inventor Hydrous calcium hydroxide powder, powdered or granular calcium carbonate, oxycarboxylic acid, oxycarboxylate, saccharide, sugar alcohol, monohydric alcohol, polyhydric alcohol, primary amine, secondary amine, alcohol amine , Succinic acid, metal succinic acid, and lignin sulfonate, the digestive water containing a water-soluble compound selected also from the group strength is 1.5-5 of the theoretical amount required for the digestion of the acid calcium. Digestion is carried out by contacting with stirring in an amount of mass times to obtain a low hydrous calcium hydroxide powder having a water content of 5 to 33% by mass.
- the present inventors rotate a high water content calcium hydroxide powder having a water content of 35 to 55% by mass prepared by mixing a calcium hydroxide powder having a BET specific surface area of 30 m 2 / g or more and water.
- the particles are granulated by the method of agglomerating the particles by contacting each other in the form of spherical water-containing porous particles to obtain hydrous calcium hydroxide particles, and then the water-containing hydrous calcium particles are dried in
- the calcium hydroxide granule obtained by the above method has a BET specific surface area of 20 m 2 Zg or more and a total pore volume of pores in the range of diameter 2 to LOONm of 0.25 to 0.40 mLZg.
- the pore volume was larger than the range and conventional calcium hydroxide calcium particulates. Furthermore, the present inventor has made high water content calcium hydroxide powder, powdered or granular acid calcium carbonate, oxycarboxylic acid, oxycarboxylate, saccharide, sugar alcohol, monohydric alcohol, polyhydric alcohol, primary amine, secondary Group power consisting of amine, alcohol, amine, succinic acid, metal succinic acid and lignosulfonate. Digested water containing a water-soluble compound selected from 1.5 to 5 of the theoretical amount required for digestion of the calcium carbonate.
- the present invention provides a porous acid-calcium granular material having an BET specific surface area of 50 m 2 / g or more, which is an aggregate of acid-calcium porous particles, Porous particles with a spherical shape and a diameter of 2 to: the total pore volume of the pores in the range of LOOnm is in the range of 0.40 to 0.70 mLZg Calcium is in particulate matter.
- Preferred embodiments of the porous acidic calcium carbonate particles of the present invention are as follows.
- the maximum pore diameter is 30 nm or more.
- the maximum pore diameter is in the range of 30-100 nm.
- the BET specific surface area is in the range of 50 to 120 m 2 Zg.
- the BET specific surface area is in the range of 60 to 90 m 2 Zg.
- the present invention also preparing a water content of 35 to 55 wt% of the high water calcium hydroxide powder BET specific surface area is combined mixing and water Mizusani ⁇ calcium powder above 30 m 2 / g
- the high water content calcium hydroxide powder is agglomerated by the method of agglomerating the particles by contacting the particles under rotation to form an aggregate of spherical water-containing porous particles.
- the present invention also relates to powdery or granular acid calcium carbonate, oxycarboxylic acid, A water-soluble compound selected from the group consisting of carboxylates, saccharides, sugar alcohols, monohydric alcohols, polyhydric alcohols, primary amines, secondary amines, alcoholamines, succinic acid, metal succinic acid, and lignite sulfonate.
- Digestion is carried out by bringing the digested water into contact with stirring in an amount 1.5 to 5 mass times the theoretical amount necessary for the digestion of the calcium oxide, and a low water content of 5 to 33 mass%.
- a step of obtaining a calcium hydroxide powder a step of adding water to the low water content calcium hydroxide and stirring to obtain a high water content calcium hydroxide powder having a water content of 35 to 55% by mass, the high water content hydrous acid Hydrous calcium hydroxide with a moisture content of 28-50% by mass, which is an aggregate of spherical hydrous porous particles, which is agglomerated by the method of agglomerating the particles by contacting the particles under rotation.
- Work to obtain granular materials The water-containing calcium hydroxide granular material is dried at a temperature of 100 to 250 ° C. for 5 hours or more until the water content becomes 0.5% by mass or less.
- the step of calcining the dried calcium hydroxide granular material at a temperature of 315 to 500 ° C. under a pressure of 300 Pa or less to produce acid calcium calcium porous particles.
- the present invention is also a fixing treatment material for a decomposition product of a halogenated gas or a halogenated gas, the main component of which is a calcium oxide granular material, wherein the acidic calcium granular material is ⁇ Agglomerates of calcium porous particles, which are porous calcium oxide particulates having a BET specific surface area of 50 m 2 / g or more, and the calcium oxide porous particles have a spherical shape and are completely porous. Diameter included in particles 2 to:
- the fixed treatment material is a porous calcium oxide granular material having a total pore volume in the range of LOOnm in the range of 0.40 to 0.70 mLZg. There is also.
- Preferred embodiments of the fixing treatment material of the halogenated gas or the decomposition product thereof according to the present invention are as follows.
- Diameter of porous acid calcium carbonate granular material 2 to: Total pore volume of pores in the range of LOOnm SO. 40 to 0.60 m 2 / g.
- the maximum pore diameter of the porous acidic calcium carbonate particles is 30 nm or more.
- the maximum pore diameter of the porous calcium oxide granular material is in the range of 30 to: LOOnm.
- the BET specific surface area of the porous calcium oxide particles is in the range of 50 to 120 m 2 Zg.
- the BET specific surface area of the porous acidic calcium carbonate particles is in the range of 60 to 90 m 2 / g.
- the strength of the porous acid calcium carbonate granular material is not more than 5% by mass, and the particle size is not less than 5% by mass.
- Porous acid calcium calcium particulate strength Hydroxy calcium is contained in an amount of 10% by mass or less.
- the proportion of porous calcium oxide particulates that contributes to the reaction with the halide gas or the decomposition product of the halide gas is 60 mol% or more.
- the present invention also provides a reaction tube filled with the above-described porous acid-calcium calcium particles of the present invention, and the porous material filled when the halide gas or the decomposition product of the halide gas is fixed.
- a reaction tube for fixing treatment of halogenated gas or decomposition products of halogenated gas characterized in that the utilization efficiency of the calcium oxide granular material is 30 mol% or more.
- the present invention is also an aggregate of calcium oxide porous particles filled in a reaction cylinder, and is a porous acid-calcium calcium particulate having a BET specific surface area of 50 m 2 Zg or more.
- Calcium fluoride porous particles are in a spherical form, and the total pore volume of pores in the diameter range of 2 to 100 nm contained in all porous particles is in the range of 0.40 to 0.70 mLZg.
- a decomposition product of a halogenated gas or a halogenated gas characterized by bringing a decomposition product of a halogenated gas or a halogenated gas into contact with the porous acid calcium particulate under reduced pressure.
- a preferred embodiment of the method for fixing a halogenated gas or a decomposition product thereof according to the present invention is as follows.
- the maximum pore diameter of the porous acidic calcium carbonate particles is 30 nm or more.
- Porous calcium carbonate strength Contains calcium hydroxide in an amount of 10% by mass or less.
- the present invention is also an aggregate of calcium oxide porous particles packed in a reaction cylinder, wherein the BET specific surface area is a porous acid-calcium calcium particulate having a BET specific surface area of 50 m 2 Zg or more.
- the calcium fluoride porous particles are in a spherical form and are included in the total porous particles.
- the present invention also includes a step of treating a semiconductor substrate with a halide gas, and an oxide calcium porous particle filled with a halide gas used in the above process in a reaction cylinder.
- It is an aggregate and is a porous acid-calcium calcium particulate having a BET specific surface area of 50 m 2 Zg or more, the calcium oxide porous particles are in a spherical form, and the diameter 2 contained in all the porous particles Fixing the waste gas of the above-mentioned process in which the total pore volume of pores in the range of ⁇ 100 nm is brought into contact with the porous acid calcium carbonate particles in the range of 0.40 to 0.70 mL / g under reduced pressure
- a method for manufacturing a semiconductor device including the step of:
- the present invention is also a porous hydroxide-calcium granular material having a BET specific surface area of 2 Om 2 Zg or more, which is an aggregate of calcium hydroxide-calcium porous particles, Porous water in which the calcium porous particles are in a spherical form and the total porous volume of the pores in the range of 2 to LOOnm is in the range of 0.25 to 0.40 mLZg It is also found in soy particles.
- porous calcium hydroxide calcium particulate material of the present invention is as follows.
- the total pore volume of pores having a diameter in the range of 2 to 100 nm is in the range of 0.25 to 0.35 mLZg.
- BET specific surface area is in the range of 20-55m 2 Zg.
- the present invention also preparing a water content of 35 to 55 wt% of the high water calcium hydroxide powder BET specific surface area is combined mixing and water Mizusani ⁇ calcium powder above 30 m 2 / g
- the method for producing the porous calcium hydroxide granules of the present invention comprising the step of drying the hydrous calcium hydroxide granules.
- the present invention further relates to powdery or granular calcium carbonate, oxycarboxylic acid, oxycarboxylate, saccharide, sugar alcohol, monohydric alcohol, polyhydric alcohol, primary amine, secondary amine, alcohol.
- Digestion water containing a water-soluble compound selected from the group consisting of amine, succinic acid, metal succinic acid and lignin sulfonate is 1.5 to 5 times the theoretical amount required for digestion of the calcium oxide.
- the method for producing a porous calcium hydroxide granule according to the present invention includes a step of obtaining a hydrous calcium hydroxide granule having a porous particle force and a step of drying the hydrous calcium hydroxide granule. There is also.
- the porous acid-calcium particles and the porous hydroxide-calcium particles of the present invention are particularly highly reactive with various gases such as halogenated gases and their decomposition products. That is, the porous acid-calcium particles and the porous hydroxide-calcium particles of the present invention are particularly useful as a fixing treatment material for halogenated gas or decomposition products of halogenated gas. is there.
- the product can be fixed and removed industrially advantageously.
- porous calcium oxide granules and porous hydroxide hydroxide calcium granules having high reactivity with various gases such as halogenated gases and their decomposition products are obtained. It becomes possible to manufacture industrially advantageous.
- the porous calcium oxide granular material of the present invention is an aggregate of calcium oxide porous particles.
- Oxy-calcium porous particles are spherical in size (primary particles).
- Aggregated particles aggregated into The acid calcium carbonate granule of the present invention has a BET specific surface area of 5 Om 2 Zg or more, preferably in the range of 50 to 120 m 2 Zg, particularly preferably in the range of 60 to 9 Om 2 Zg.
- the calcium oxide granules of the present invention have a total pore volumetric force SO. 40 to 0.70 mL / g, particularly 0.40 to 0.60 mL / g, of pores in the range of diameter 2 to LOOnm. It is in the range of g.
- the total pore volume means the pore volume determined by the desorption isotherm force BJH method of nitrogen gas.
- the porous calcium oxide granular material of the present invention preferably has a maximum pore diameter of 30 nm or more, more preferably in the range of 30 to 100 nm, and more preferably in the range of 40 to 80 nm. Particularly preferred.
- the maximum pore diameter is the mode diameter of a pore measured by a mercury intrusion method, and means the diameter of the pore having the largest pore volume expressed by dv (log d). If the maximum pore diameter is too small, it becomes difficult for the gas to be treated to enter the porous particles constituting the granular material, and the fixation efficiency of the gas to be treated tends to be lowered.
- the maximum pore diameter is too large, the strength of the porous particles constituting the granular material is reduced, and it tends to collapse.
- a gas fixing treatment material such as halogenated gas
- the porous particles may collapse, resulting in a problem that the appropriate particle size cannot be maintained and the conductance of the reaction tube is lowered.
- plasma is used to excite halogenated gases, if the maximum pore diameter is excessively large, the skeleton of the particles cannot be maintained, and the pressure loss caused by the reaction cylinder may increase, thereby inhibiting plasma discharge. There is.
- the powdered calcium oxide granular material of the present invention preferably has a pulverization rate of 2.0% by mass or less, and more preferably 1.5% by mass or less 1.0. It is more preferable that the amount is not more than mass%. It is particularly preferable that the amount is not more than 0.4 mass%.
- the pulverization rate is obtained when a porous calcium oxide granular material is put into a sieve having an opening of 250 m and vibrated for 10 minutes under the conditions of amplitude lmm and frequency 50 times Z seconds.
- it means the mass percentage of particles that have passed through the sieve with respect to the total amount of porous calcium oxide particles.
- This pulverization rate is an index that indicates the ease with which the porous particles are collapsed during transportation or when the reaction column (column) is packed. That is, in the porous calcium oxide granular material used by filling the reaction cylinder, In particular, a low powdering rate is preferred.
- the porous calcium carbonate granule of the present invention may contain calcium carbonate and Z or calcium hydroxide in a range where the content thereof does not exceed 20% by mass, particularly 10% by mass. .
- the porous calcium carbonate granular material of the present invention has pores having a diameter of 2 to 9 nm in a pore distribution determined using a desorption isotherm measured using nitrogen gas and the BJH method. It is preferable that the distribution has a peak divided into two, that is, a pore having a diameter of 10 to 100 nm. Specifically, in the pore diameter distribution curve Ds (logd) based on the specific surface area obtained using the BJH method, the pore diameter ranges from 2 to 9 nm and the pore diameter ranges from 10 to 100 nm. It is preferable that one or more peaks are observed.
- the pores having a diameter in the range of 2 to 9 nm correspond to pores formed on the surface and inside of the fine particles constituting the porous particles. Therefore, when the specific surface area of all the pores in the diameter range of 2 to 9 nm is large, the gas adsorption ability of the fine particles constituting the porous particles is improved.
- Total pore specific surface area of pores in the diameter range of 2 ⁇ 9nm obtained by BJ H method is in the range of preferably tool 30 ⁇ 85m 2 / g in the range of 20 to 1 00m 2 / g Is particularly preferred.
- a pore having a diameter of 10 to: LOOnm corresponds to a pore formed as a gap between the fine particles constituting the porous particles. Accordingly, when the volume of all pores in the range of diameter 10 to: LOOnm is large, the gas to be treated can easily enter between the fine particles constituting the porous particles, and the porous particles Gas adsorption capacity is improved. Diameter required by BJH method 10 ⁇ : The total pore volume of LOOnm pores is preferably in the range of 0.10 ⁇ 0.60mLZg and should be in the range of 0.20 ⁇ 0.55mLZg. A more preferred range is 0.35 to 0.55 mLZg.
- the porous calcium oxide granular material of the present invention is used as a fixing treatment material for a halide gas or a decomposition product of a halide gas
- the porous calcium oxide granular material is used for a reaction with the decomposition product of the halide gas or the halide gas. More preferably, the contribution ratio is 60 mol% or more.
- the ratio contributing to the reaction means that the calcium contained in the porous calcium oxide particles is brought into contact with the halide gas or a decomposition product thereof. This means the molar percentage of calcium converted to calcium halide.
- the reaction cylinder filled with the porous acid-calcium particles of the present invention when the halogen gas or the decomposition product of the halogen gas is fixed, the charged porous acid-calcium is filled. It is preferable that the utilization efficiency of the granular material is 30 mol% or more. In the present specification, the utilization efficiency is changed to halogenated calcium by contacting the calcium in the total amount of porous calcium oxide particles filled in the reaction cylinder with a halogenated gas or a decomposition product thereof. This is the molar percentage of calcium that is effectively used.
- the porous calcium carbonate granular material of the present invention is a high water content hydrous acid having a water content of 35 to 55% by mass by mixing calcium hydroxide powder having a BET specific surface area of 30 m 2 Zg or more and water.
- a step of preparing ⁇ calcium powder, the high water content calcium hydroxide powder is granulated by a method of agglomerating particles by contact between particles under rotation, and a water content which is an aggregate of spherical water content porous particles.
- the raw material hydroxy calcium powder used as a raw material has a BET specific surface area in the range of 30 to 65 m 2 Zg, and further 30 to 60 m 2. It is preferably in the range of Zg.
- the calcium hydroxide powder preferably has a total pore volume in the range of 0.25-0.50 mLZg of pores having a diameter of 2 to LOOnm.
- a calcium hydroxide calcium powder having a BET specific surface area of 30 m 2 / g or more can be produced, for example, by the method described in (1) to (3) below.
- the high water content calcium hydroxide powder which is an intermediate product of the above (1) hydroxide solution calcium powder
- the high water content calcium hydroxide powder can also be used. That is, as a high water content hydrous calcium carbonate powder, powdery or granular acid calcium is added to xylic acid rubonic acid, oxycarboxylate, saccharide, sugar alcohol, monohydric alcohol, polyhydric alcohol, first grade. Digestion water containing a water-soluble compound selected from the group consisting of amines, secondary amines, alcoholamines, succinic acid, metal succinic acid and lignite sulfonate is used for digestion of the acidic calcium.
- the water-soluble compounds are particularly preferably sorbitol and diethylene alcohol, which are preferably sugar alcohol and polyhydric alcohol.
- the amount of the water-soluble compound in the digested water is generally from 0.1 to the calcium hydroxide produced by the digestion of calcium oxide when sorbitol and diethylenedarcol are used as the water-soluble compound. It is in the range of 20% by mass, preferably in the range of 0.1 to 10% by mass, more preferably in the range of 0.1 to 5.0% by mass.
- the powdered or granular calcium oxide used as a raw material is defined in the reference test method of the Japan Lime Association!
- the activity measured by the coarse-grain titration method (measured using 50 g of acid calcium and 4N hydrochloric acid).
- the constant value) is preferably 200 mL (5 minutes value) or more.
- the high hydrous calcium hydroxide powder is granulated by a method of aggregating the particles by contacting the particles under rotation, A water-containing calcium hydroxide granular material (aggregate of spherical water-containing porous particles) having a water content of 28 to 50% by mass is used.
- a method of agglomerating particles by contacting particles under rotation a rolling granulation method and a stirring granulation method can be used.
- hydrous porous particles can be obtained without applying excessive pressure to the highly hydrous calcium hydroxide powder. Therefore, the water-containing porous particles obtained in this granulation step tend to have a larger interval between the calcium hydroxide and calcium fine particles than the porous particles obtained by the extrusion method.
- Granulation of the high water content calcium hydroxide powder is preferably performed while heating the high water content calcium hydroxide powder at a temperature of 100 to 200 ° C.
- the growth of calcium hydroxide fine particles proceeds and the bonding between the calcium hydroxide and calcium fine particles (primary particles) becomes stronger. The strength of the porous particles tends to increase.
- the water-containing calcium hydroxide granular material obtained in the granulation step is dried over a period of 5 hours or more until the water content becomes 0.5 mass% or less.
- the drying temperature is generally in the range of 100 to 250 ° C, preferably in the range of 120 to 200 ° C.
- Hydrous calcium hydroxide granular material In order to prevent the carbonate of calcium hydroxide and calcium carbonate from being dried, it is preferable that the inside of the dryer is deaerated using a hermetic dryer. By adjusting the pressure in the dryer by degassing, it is possible to adjust the time until the water content of the water-containing calcium hydroxide granular material becomes 0.5% by mass or less.
- the pressure in the dryer is usually in the range of atmospheric pressure to 0.1 l X 10 5 Pa.
- the drying time until the water content of the water-containing calcium hydroxide granular material is 0.5% by mass is preferably in the range of 10 to 30 hours, particularly preferably in the range of 20 to 30 hours. Good.
- the longer the drying time in this drying step the lower the powdery rate of the finally obtained calcium oxide granular material, that is, the tendency that fine powder is generated.
- the total pore volume of pores in the range of LOOnm is generally in the range of 0.25 to 0.40 mLZg, preferably in the range of 0.25 to 0.35 mL LZg .
- the above dry hydroxylated lucium granule is usually 300 Pa or less, preferably in the range of 1 to 200 Pa, more preferably in the range of 1 to 150 Pa. Under pressure, usually 315-500. C, preferably 330-450. Bake at a temperature of C to form porous calcium oxide granules. Although the firing time varies depending on conditions such as the firing temperature, it is generally in the range of 30 minutes to 30 hours.
- the porous calcium carbonate granular material of the present invention can be advantageously used as a hygroscopic material, an acidic gas fixing treatment material, a halogenated gas and a decomposition product thereof.
- the acidic gas that can be fixed with the porous acidic calcium carbonate particles of the present invention include hydrogen fluoride gas, hydrogen chloride gas, diacid sulfur gas, and carbon dioxide gas.
- the halogen gas that can be fixed with the porous acid calcium carbonate particles of the present invention is a compound in which part or all of the hydrogen in the hydrocarbon is substituted with halogen (especially fluorine or bromine). Gas decomposition products are included.
- the porous calcium carbonate calcium particles of the present invention are mixed with a fluorocarbon gas decomposition catalyst and used as a fixing treatment material for fluorocarbon gas (including perfluorocarbon gas). can do.
- a decomposition catalyst of fluorocarbon gas used in combination with the porous acid-calcium calcium particulate material of the present invention an alumina-based catalyst containing 80% acid-aluminum, 80% acid-aluminum and 20% nickel oxide (NiO) is used. Can be mentioned.
- the gas decomposition catalyst is preferably a catalyst capable of decomposing fluorocarbon gas in the presence of water vapor, usually at a temperature of 300 to 1000 ° C. (special temperature, 700 to 1000 ° C.).
- the decomposition catalyst for fluorocarbon gas is preferably a porous granular material.
- the compounding ratio of the fluorocarbon gas decomposition catalyst in the fluorocarbon gas decomposition treatment material and the porous acid calcium carbonate particles of the present invention may be in the range of 10:90 to 90:10 by mass ratio. I like it.
- the porous calcium carbonate calcium particles of the present invention can be advantageously used particularly for filling a reaction tube (column).
- the reaction cylinder filled with the porous acid-calcium calcium granular material of the present invention can be arranged in the flow path of the gas to be treated.
- the porous calcium oxide calcium granular material of the present invention can be used by appropriately adjusting its size (particle size) according to the application. Porous oxidation power when packed in a reaction cylinder and used
- the content of particles with a particle size of 1 mm or less is less than 5% by mass (particularly 1% by mass or less), and the particle size is 10 mm.
- the content of the above particles is less than 5% by mass (in particular, 1% by mass or less).
- FIG. 1 is a configuration diagram showing an example of a halide gas fixing treatment apparatus using the porous acidic calcium carbonate particles of the present invention as a fixing treatment material.
- the halogen gas fixing treatment apparatus 3 includes a pretreatment section 31 and a gas fixation section 32 connected to the pretreatment section 31 via a pipe 36.
- the halide gas is excited to improve the reactivity of the halogen gas to the acid calcium, or the halogen gas is decomposed to react with the calcium oxide.
- a pretreatment is performed to convert the product into a high decomposition product.
- plasma treatment can be exemplified.
- Methods for converting halide gas into highly reactive decomposition products include hydrolysis, combustion components. Examples include a decomposing process, an oxidative decomposition process, a thermal decomposition process, and a catalytic decomposition process.
- the halogen gas or its decomposition product and the porous acid calcium calcium particulates are brought into contact with the porous acid gas calcium particles by bringing the halogen gas or decomposition products into contact therewith.
- the gas fixing part 32 is a cylindrical container composed of a porous plate 34 provided inside and a porous acidic calcium particulate material 33 filled on the porous plate 34.
- An exhaust pump 5 is connected to the gap 35 between the bottom of the gas fixing part 32 and the porous plate 34.
- other treatment conditions are not particularly limited as long as the effects of the present invention are not impaired.
- a semiconductor device (semiconductor device) manufacturing facility 1 includes a semiconductor substrate (as described above, a semiconductor material film is provided on a substrate such as a semiconductor material substrate or an insulator). Or a semiconductor material, an insulator material, or a structure in which one or more insulator material films, semiconductor material films, and Z or conductor material films are provided directly or indirectly on these substrates. Used in processes that selectively etch conductive materials, processes that form CF films on semiconductor substrates by CVD, and processes that clean unwanted deposits that adhere to the inner wall of the chamber after the CVD process. The halogenated gas is exhausted from the semiconductor device manufacturing facility 1 by the exhaust pump 2.
- CxFy gas for example, CF, CF gas, etc.
- a CxFy gas obtained by decomposition thereof, and a SiF gas derived from a material to be etched (for example, Si or SiO 2). Used as a raw material in the CF film CVD process
- Non-decomposed gas of CxFy gas for example, CF gas
- CxFy gas for example, CF gas
- Waste gas for example, CF gas, CF gas, CF gas, etc.
- the waste gas exhausted from equipment 1 is sent to the halogenated gas fixed treatment equipment 3.
- the waste gas is excited or separated by the pretreatment unit 31. After being unraveled, it is sent to the gas fixing part 32 through the pipe 36.
- the excited halide gas or the decomposition product thereof is fixed and removed in contact with the porous acidic calcium particulates under reduced pressure.
- the gas from which the halogenated gas or its decomposition products have been removed passes through the gap 35 and is exhausted to the outside by the exhaust pump 5.
- the porous porous calcium hydroxide particles of the present invention are aggregates of hydroxy hydroxide calcium porous particles.
- the calcium hydroxide calcium porous particles are aggregated particles in which hydroxide calcium calcium fine particles (primary particles) are aggregated in a spherical shape.
- the total pore volume of the pores in the range is in the range of 0.25 to 0.4 OmLZg, in particular in the range of 0.25 to 0.35 mLZg.
- the porous hydroxide-calcium granule of the present invention can be used as the dry hydroxide-calcium granule in the production of the porous acid-calcium granule of the present invention. If calcined as described above, the porous calcium carbonate calcium granular material of the present invention can be obtained.
- the porous calcium hydroxide calcium granular material of the present invention has a powdering rate of 2.0% by mass or less, and more preferably 1.0% by mass or less. More preferably, the content is 4% by mass or less, and particularly preferably 0.2% by mass or less.
- the porous calcium hydroxide granular material of the present invention may contain calcium carbonate and Z or calcium oxide in a content not exceeding 20 mass%, particularly not exceeding 10 mass%. .
- the porous hydroxide-calcium granular material of the present invention has a desorption isotherm measured using nitrogen gas and has a diameter of 2-9 nm in the pore distribution determined using the BJH method. Pore and diameter 10 ⁇ : It is preferable that the distribution is made with a peak that is divided into two pores of LOOnm. Specifically, in the pore diameter distribution curve Ds (log d) based on the specific surface area obtained using the BJH method, the pore diameter ranges from 2 to 9 nm and the pore diameter ranges from 10 to 100 nm. It is preferable that one or more peaks are observed.
- the pores having a diameter in the range of 2 to 9 nm correspond to the pores formed on the surface and inside of the fine particles constituting the porous particles. Therefore, all pores with pores in the diameter range 2-9nm When the specific surface area is large, the gas adsorption ability of the fine particles constituting the porous particles is improved.
- Total pore specific surface area of pores in the diameter range of 2 ⁇ 9nm obtained by BJ H method is in the range of 5 to 25 m 2 / g preferably in the range of instrument 10 to 25 2 / g Is particularly preferred
- the pores having a diameter in the range of 10 to: LOOnm correspond to pores formed as a gap between the fine particles constituting the porous particles. Accordingly, when the volume of all pores in the range of diameter 10 to: LOOnm is large, the gas to be treated can easily enter between the fine particles constituting the porous particles, and the porous particles Gas adsorption capacity is improved.
- the total pore volume of pores with a diameter of 10 to 100 nm required by the BJH method is preferably in the range of 0.20 to 0.35 mLZg, and in the range of 0.25 to 0.35 mL / g. It is particularly preferred.
- the high hydrous calcium hydroxide powder having a water content of 35 to 55% by mass used in the production of the porous hydroxy calcium carbonate particles of the present invention has a BET specific surface area of 30 m 2 / g or more. It can be prepared by mixing calcium powder and water. It is preferable that the raw material hydroxide power lucium powder has a BET specific surface area of 30 to 65 m 2 Zg, more preferably 30 to 60 m 2 Zg.
- the calcium hydroxide powder preferably has a total pore volume in the range of 0.25-0.50 mLZg of pores in the range of diameter 2 to: LOOnm.
- the water-soluble compounds are particularly preferably sorbitol and diethylene alcohol, which are preferably sugar alcohol and polyhydric alcohol.
- the amount of water-soluble compound in the digestion water is In the case of using bitol and diethylene dalcol, it is generally in the range of 0.1 to 20% by mass, preferably in the range of 0.1 to 10% by mass, based on calcium hydroxide produced by digestion of calcium oxide. More preferably, it is in the range of 0.1 to 5.0% by mass.
- the above-mentioned highly hydrous calcium hydroxide powder is granulated by a method of agglomerating particles by contact between the particles under rotation, and water content is obtained.
- a hydrous calcium hydroxide granular material (aggregate of spherical hydrous porous particles) having a rate of 28 to 50% by mass is used.
- a rolling granulation method and a stirring granulation method can be used as a method of agglomerating particles by contacting particles under rotation.
- the granulation of the high water content calcium hydroxide powder is preferably performed while heating the high water content calcium hydroxide powder at a temperature of 100 to 200 ° C.
- the growth of calcium hydroxide fine particles proceeds and the bonding between the calcium hydroxide and calcium fine particles (primary particles) becomes stronger. The strength of the porous particles tends to increase.
- the water-containing calcium hydroxide granular material obtained in the granulation step is dried at a temperature of 100 to 250 ° C, more preferably 120 to 200 ° C. Drying of the hydrous calcium hydroxide particulates is preferably carried out while degassing the inside of the dryer using a hermetic dryer in order to prevent calcium carbonate from being hydrated. By adjusting the pressure in the dryer by degassing, it is possible to adjust the time required for drying the hydrous calcium hydroxide calcium particulates.
- the pressure in the dryer is usually in the range of atmospheric pressure to 0.1 X 10 5 Pa.
- the porous calcium hydroxide granular material of the present invention is an acidic gas fixing treatment material, halide gas, and decomposition products thereof. It can be advantageously used as a fixed processing material.
- the porous calcium hydroxide particulate material of the present invention can be used by mixing with a fluorocarbon gas decomposition catalyst and mixing with a fluorocarbon gas (including perfluorocarbon gas). it can.
- the porous calcium hydroxide calcium granular material of the present invention can be used by appropriately adjusting its size (particle size) according to the application.
- Porous hydroxyaluminum calcium granules when used in a reaction tube generally have a particle content of less than 5% by mass (particularly 1% by mass or less) with a particle size of 1 mm or less. Is less than 5% by weight (particularly 1% % Or less).
- Moisture content [% by mass] 100 X Loss on drying [g] Mass of Z measurement object [g]
- pore diameter distribution curve Ds (logd) based on specific surface area calculated by desorption isotherm force BJH method.
- the pore specific surface area is obtained from the cumulative pore specific surface area curve calculated by the BJH method from the desorption isotherm.
- the pore volume is determined from the cumulative pore volume curve calculated by the BJ H method from the desorption isotherm.
- the desorption isotherm is obtained by a nitrogen gas adsorption method using a fully automatic gas adsorption measuring device (Autosorb-3B) manufactured by Quantach Rome.
- the maximum pore diameter is measured by a mercury intrusion method using a fully automatic pore distribution measuring device (PoreMaster 60-GT) manufactured by QuantaChrom.
- Powder ratio (10 minutes value) [mass%] 100 X sample weight under sieve [g] / 60 [g]
- a lump calcium oxide lump (baked quicklime) having a particle size of S40 to 70 mm was pulverized until passing through a sieve having a mesh size of 74 m (200 mesh) and passing 75 mass% or more.
- the activity of the resulting calcium carbonate powder was 205 mL at 5 minutes and 212 mL at 10 minutes. The activity was measured by the following method (a method based on the coarse grain titration method of the Japan Lime Association Reference Test Method).
- the stirring speed of the stirring mixer was changed to 180 rpm, and the high water content calcium hydroxide powder was stirred for 5 minutes to granulate spherical water-containing porous particles. Obtained hydrous hydroxide The moisture content of the shim granules was 30% by mass.
- the dried calcium hydroxide granules produced in (4) above are placed in a vacuum firing electric furnace, the furnace pressure is reduced to 50 Pa or less using a vacuum pump, and the furnace temperature is changed from room temperature to 1.5 ° C / The temperature was raised to 425 ° C at a rate of minutes and calcinated for 14 hours while maintaining the furnace temperature. Next, it was allowed to cool until the furnace temperature in the vacuum firing electric furnace reached 250 ° C, and the fired product was taken out from the furnace. During firing, the vacuum firing electric furnace was always evacuated with a vacuum pump so that the furnace pressure did not exceed 150 Pa. Also, the fired product was taken out after adjusting the furnace pressure to atmospheric pressure with nitrogen gas.
- the obtained fired product was a porous granular material of calcium carbonate.
- the resulting porous acidic particulate material has a BET specific surface area of 75.4m 2 Zg and a diameter of 2 ⁇ : LOOnm.
- the total pore volume is 0.560mL / g, the maximum pore size.
- the diameter was 58.8 nm and the powdering rate was 0.18% by mass.
- the obtained porous acid-calcium calcium granular material had a pore diameter of 2 to It was confirmed that the pores were distributed with peaks in the range of 9 nm and the range of pore diameters of 10 to 100 nm.
- the total pore specific surface area of the pores in the range of diameter 2-9 nm was 67.3 m 2 Zg, and the total pore volume of the pores in the range of diameter 10-: LOOnm was 0.459 mLZg.
- a porous acid calcium carbonate granule produced as described above (particle size is about 3 mm, and the content of particles having a particle size of 1 mm or less or 10 mm or more is 1% by mass or less, respectively)
- the gas and its decomposition products were fixed.
- a commercially available high-frequency plasma generator such as an alumina cylindrical treatment tube, a high-frequency coil wound around the outer periphery of the treatment tube, and a high-frequency power source with a frequency of 2 MHz was used.
- the output of the high-frequency power source was 3.
- the gas fixing part 32 was a bottomed cylindrical reaction tube made of stainless steel with an inner diameter of 150 mm and a length of 600 mm.
- the mass of the porous calcium oxide calcium particles filled in the gas fixing part 32 was 2 kg, and the filling height was 155 mm.
- an infrared absorption spectroscopic analyzer is provided on the exhaust side of the exhaust pump 5 connected to the gas fixing portion 32.
- the pretreatment unit 31 includes Ar gas and O gas.
- the mixed gas consisting of 4 2 and CF gas is Ar: 300 sccm, O: 150 sccm, CF: 50 sccm
- the internal pressure of the pretreatment section 31 during the fixing process was maintained at 0.4 kPa (3 torr).
- the porous calcium carbonate calcium particles filled in the gas fixing part 32 are stable without collapsing, and the pressure loss due to the gas fixing part 32 is as low as 0.2 kPa during the processing.
- the internal pressure of the portion 31 was also stable, and good plasma discharge could be maintained. That is, the porous calcium oxide granular material of the present invention has a low pulverization rate, can maintain the skeleton of the particles, and can maintain the plasma discharge without increasing the pressure loss caused by the gas fixing part 32. did it.
- one of the porous calcium oxide particles at a depth of 50 mm from the filling surface of the porous calcium oxide particles in the gas fixing part 32 is sampled, and the one granular material is sampled.
- EDX energy dispersive X-ray fluorescence spectrometer
- the overall granular material has an F ZCa ratio of 0.86, ie
- reaction contribution ratio was 86 mol%.
- Example 1 In the drying of the hydrous calcium carbonate granule of Example 1 (4), the pressure in the dryer was changed to about 0.5 X 10 5 Pa, and the hydrous calcium hydroxide granule was heated at a temperature of 180 ° C. A fired product was produced in the same manner as in Example 1 except that the moisture content was not more than 0.5% by mass and dried for 8 hours.
- the obtained fired product was a porous granular material of calcium carbonate.
- the resulting porous acidic particulate material has a BET specific surface area of 70. OmVg, a diameter of 2 to: the total pore volume of the pores in the range of LOOnm is 0.567 mLZg, and the maximum pore diameter is 37. lnm and the powdering rate were 0.45% by mass.
- the obtained porous acid-calcium calcium granular material had a pore diameter of 2 to It was confirmed that the pores were distributed with peaks in the range of 9 nm and the range of pore diameters of 10 to 100 nm.
- the total pore specific surface area of the pores in the range of diameter 2-9 nm was 40.9 m 2 Zg, and the total pore volume of the pores in the range of diameter 10-: LOOnm was 0.505 mLZg.
- the obtained porous calcium oxide granules (particle size was about 3 mm, and the content of particles having a particle size of 1 mm or less or 10 mm or more was 1% by mass or less, respectively) as in Example 1.
- the gas fixing part 32 of the halogenated gas fixing processing device is filled with CF gas and its
- the utilization efficiency of the porous acidic particles filled in the gas fixing part 32 was 30.3 mol%.
- the ratio was 0.60, that is, the reaction contribution ratio was 60 mol%.
- Example 1 Example 1 except that the pressure in the furnace was not over 500 Pa, the firing temperature was 550 ° C, and the firing time was 7 hours. A fired product was produced in the same manner as described above.
- the obtained calcined product was confirmed to be a porous granule of acid calcium by X-ray diffractometry, and its BET specific surface area was 41.8 mVg and pores having a diameter in the range of 2 to 100 nm.
- the total pore volume was 0.344 mL / g, the maximum pore diameter was 45 nm, and the powdering rate was 0.45% by mass.
- the pores are distributed in the range of the pore diameter of 2 to 9 nm and the pore diameter of 10 to: LOOnm, respectively.
- the total pore specific surface area of the pores was 27.8 m 2 Zg, pore diameter 10 to: the total pore volume of the pores in the range of LOOnm was 0.312 mLZg.
- porous calcium oxide granules (particle size is about 3 mm, and the content of particles having a particle size of 1 mm or less or 10 mm or more is 1% by mass or less) are fixed to halide gas.
- the gas fixing part 32 of the processing equipment is filled up so that the mass is 18 g and the filling height is 5 mm, and the flow rate of the mixed gas consisting of Ar gas, O gas and CF gas is Ar: 264 sccm
- the internal pressure of the pretreatment section 31 during the fixing process is maintained at lkPa.
- Example 1 (m 2 / g) (m L / g) (nm) (mol%)
- Example 1 7 5 .4 0 .5 6 0 5 8 .8 8 6
- Example 2 7 0 .0 0 .5 6 7 3 7 1 6 0
- Comparative Example 1 4 1 .8 0 .3 4 4 4 5 3 6
- a fired product was produced in the same manner as in Example 1 except that the drying time of the hydrous calcium hydroxide granular material of Example 1 (4) was 72 hours.
- the obtained fired product was a porous granular material of calcium oxide and its BET specific surface area was 108.5 m 2.
- the total pore volume of the pores in the range of Zg and a diameter of 2 to 100 nm was 0.415 mL / g, the maximum pore diameter was 70.5 nm, and the dust ratio was 1.2% by mass.
- the pore distribution of the obtained porous calcium oxide granular material was confirmed by a pore diameter distribution curve Ds (log d) based on the specific surface area.
- Example 1 The pressure loss due to the gas fixing part 32 during the fixing process was 0.4 kPa, and the force of removing the CF gas slightly higher than that in Example 1 was almost the same as that in Example 1.
- Porous calcium carbonate particles were produced in the same manner as in Example 2 except that the baking time of the dry calcium hydroxide particles was changed to 4 hours.
- the obtained porous acidic calcium carbonate granule has a BET specific surface area of 78.
- OmVg a diameter of 2 to: LOOnm
- the total pore volume is 0.558 mL / g
- the powdering rate is 0. It was 14% by mass and contained 4% by mass of calcium hydroxide.
- the fixing treatment starting force was also measured by FT-IR for the amount of water in the exhaust gas from the exhaust pump 5.
- Example 1 In the firing of the dried calcium hydroxide granule of Example 1 (5), the fired product was obtained in the same manner as in Example 1 except that the firing time of the dried calcium hydroxide particulate was set to 4.5 hours. 7 manufactured.
- the obtained fired product was a porous granular material of calcium carbonate.
- the resulting porous acidic particulate material has a BET specific surface area of 77.4 m 2 Zg, diameter 2 to: pores in the range of LOOnm
- the total pore volume was 0.557 mL / g, and the powdering rate was 0.15% by mass.
- the pore distribution of the obtained porous porous calcium carbonate particles was confirmed by a pore diameter distribution curve D s (log d) based on the specific surface area.
- pores were distributed with peaks in the range of 2 to 9 nm and the pore diameter of 10 to: LOOnm.
- the total pore specific surface area of the pores in the range of 2 to 9 nm in diameter was 72.8 m 2 / g, and the total pore volume of the pores in the range of 10 to 100 nm in diameter was 0.456 mLZg.
- Example 1 In the drying of the hydrous calcium carbonate granule of Example 1 (4), the moisture content is 0.5 mass at a temperature of 180 ° C by changing the pressure in the dryer to about 0.5 X 10 5 Pa. In the firing of dried calcium hydroxide calcium particles in (5), the firing time of the dried hydroxide calcium particles is set to 4.5 hours. A fired product was produced in the same manner as in Example 1 except that.
- the obtained fired product was a porous granular material of calcium carbonate.
- the resulting porous acidic particulate material has a BET specific surface area of 79. OmVg, a diameter of 2 to: the total pore volume in the range of LOOnm is 0.573 mLZg, and the dusting rate is 0.62 It was mass%.
- the pore distribution of the obtained porous porous calcium carbonate particles was confirmed by a pore diameter distribution curve D s (log d) based on the specific surface area.
- the pores were distributed with the peak of the pores in the range of 2 to 9 nm and the pore diameter of 10 to: LOOnm, respectively.
- the total pore specific surface area of the pores in the diameter range of 2-9 nm was 54.5 m 2 Zg, and the total pore volume of the pores in the diameter range of 10-100 nm was 0.500 mLZg.
- Example 1 The high water content calcium hydroxide powder produced in the same manner as in the production of the high water content calcium hydroxide powder in (2) was put into a shelf-type vacuum dryer, and the pressure in the dryer was determined using a vacuum pump. Was degassed to 0.5 X 10 5 Pa or less, dried at a temperature of 180 ° C until the water content of the calcium hydroxide powder having a high water content was 0.5 mass% or less, and crushed. .
- the obtained calcium hydroxide dry powder had a BET specific surface area of 38.5 m 2 / g, and the total pore volume of pores having a diameter in the range of 2 to: L00 nm was 0.317 mLZg.
- hydrous calcium hydroxide granular material was dried in the same manner as in Example 1. (Dryer pressure: about 1. OX 10 5 Pa, temperature: 180 ° C, moisture content 0.5 mass% or less (24 hours) until dry, calcium hydroxide granules were classified, classified, and fired (furnace pressure: 150 Pa or less, temperature: 425 ° C., firing time: 14 hours).
- the obtained fired product was a porous granular material of calcium carbonate.
- the obtained porous acid-solid material has a BET specific surface area of 72.3 m 2 Zg, a total pore volume of pores in the diameter range of 2 to 100 nm of 0.575 mL / g, and a pulverization rate. 0.08% by mass.
- the pore distribution of the obtained porous porous calcium carbonate particles was confirmed by a pore diameter distribution curve D s (log d) based on the specific surface area.
- pores were distributed with peaks in the range of 2 to 9 nm and the pore diameter of 10 to: LOOnm.
- the total pore specific surface area of the pores in the diameter range of 2-9 nm was 67.3 m 2 Zg, and the total pore volume of the pores in the diameter range of 10-100 nm was 0.475 mLZg.
- the obtained dry calcium hydroxide calcium powder had a BET specific surface area of 47.0 m 2 Zg, and a total pore volume of pores in the range of diameter 2 to LOONm was 0.276 mLZg.
- hydrous calcium hydroxide granular material was dried in the same manner as in Example 1. (Dryer pressure: about 1. OX 10 5 Pa, temperature: 180 ° C, moisture content 0.5 mass% or less (24 hours) until dry, calcium hydroxide granules were classified, classified, and fired (furnace pressure: 150 Pa or less, temperature: 425 ° C., firing time: 14 hours).
- the obtained fired product was a porous granular material of calcium carbonate.
- the resulting porous acidic particulate material has a BET specific surface area of 77. OmVg and a diameter of 2 to: LOOnm with a total pore volume of 0.537 mLZg and a pulverization rate of 0.15. It was mass%.
- the pore distribution of the obtained porous porous calcium carbonate particles was confirmed by a pore diameter distribution curve D s (log d) based on the specific surface area.
- pores were distributed with peaks in the range of 2 to 9 nm and the pore diameter of 10 to: LOOnm.
- the total pore specific surface area of the pores in the diameter range of 2 to 9 nm was 80.8 m 2 / g, and the total pore volume of the pores in the diameter range of 10 to 100 nm was 0.418 mLZg.
- Drying of the hydrous calcium hydroxide particles was carried out by changing the pressure in the dryer to about 0.5 X 10 5 Pa and taking 8 hours until the water content became 0.5% by mass or less.
- a fired product was produced in the same manner as in Example 6 except that. [0113] When the chemical composition of the obtained fired product was analyzed by X-ray diffraction, it was confirmed that the obtained fired product was a porous granular material of calcium carbonate.
- the resulting porous acid-siculate granule has a BET specific surface area of 76.8 m 2 / g, a total pore volume of pores in the range of 2 to 100 nm in diameter of 0.579 mLZg, and a pulverization rate of 0 78% by weight.
- the pore distribution of the obtained porous porous calcium carbonate particles was confirmed by a pore diameter distribution curve D s (log d) based on the specific surface area. It was confirmed that pores were distributed with peaks in the range of 2 to 9 nm and the pore diameter of 10 to: LOOnm.
- the total pore specific surface area of the pores in the diameter range of 2-9 nm was 47.6 m 2 Zg, and the total pore volume of the pores in the diameter range of 10-100 nm was 0.512 mLZg.
- the porous calcium carbonate particles produced in Examples 5 to 9 all have a high BET specific surface area and a large pore volume.
- the porous calcium carbonate granular material produced with a hydrous hydroxylation capacity of sucrose granular material for 24 hours has a pulverization rate of 0.2% by mass or less, and fine powder is hardly generated. It is very advantageous when packed in a reaction cylinder (column).
- a lump calcium oxide lump (baked quicklime) having a particle size of S40 to 70 mm was pulverized until passing through a sieve having a mesh size of 74 m (200 mesh) and passing 75 mass% or more. Obtained acid calcium powder The activity of was 205 mL at 5 minutes and 212 mL at 10 minutes.
- the above-mentioned water-containing calcium hydroxide granular material is put into a shelf-type vacuum dryer, and using a vacuum pump, the pressure in the dryer is deaerated so as to be about 1. OX 10 5 Pa. It was dried for 24 hours until the water content became 0.5% by mass or less at a temperature of 180 ° C. Next, the obtained porous calcium hydroxide particles were classified with a circular vibrating sieve to adjust the particle diameter to a range of 2.0 to 5.6 mm.
- the obtained porous hydroxy calcium carbonate particles have a BET specific surface area of 28.7 mVg, a diameter of 2 to: the total pore volume of pores in the range of LOOnm is 0.301 mL / g, powdered The rate was 0.07 mass%.
- the obtained porous calcium hydroxide granular material was confirmed by a pore diameter distribution curve Ds (log d) based on the specific surface area, the obtained granular material had a pore diameter of 2 to It was confirmed that pores were distributed with peaks in the range of 9 nm and the range of pore diameters of 10 to 100 nm.
- the total pore specific surface area of pores in the range of 2-9 nm in diameter was 13. Om 2 Zg and the total pore volume of pores in the range of 10 to: LOOnm was 0.286 mL / g .
- a high water content calcium hydroxide powder produced in the same manner as in Example 10 was converted into a shelf-type vacuum dryer.
- the moisture content becomes 0.5% by mass or less at a temperature of 180 ° C. while degassing using a vacuum pump so that the pressure in the dryer is 0.5 X 10 5 Pa or less.
- the obtained calcium hydroxide calcium dry powder had a BET specific surface area of 38.5 m 2 / g and a total pore volume of pores having a diameter in the range of 2 to 10 nm was 0.317 mLZg.
- hydrous calcium hydroxide particles were dried in the same manner as in Example 10. (Dryer pressure: about 1.0 X 10 5 Pa, temperature: 180 ° C, moisture content 0.5 mass% or less The time to reach: 24 hours) was classified and the particle size was adjusted to a range of 2.0 to 5.6 mm.
- the resulting porous hydroxy calcium carbonate particles have a BET specific surface area of 29.6 mVg, a diameter of 2 to: the total pore volume of the pores in the range of LOOnm is 0.393 mL / g, pulverized The rate was 0.08% by mass.
- the pore distribution of the obtained porous calcium hydroxide granular material was confirmed by a pore diameter distribution curve Ds (log d) based on the specific surface area, the obtained granular material had a pore diameter of 2 to It was confirmed that pores were distributed with peaks in the range of 9 nm and the range of pore diameters of 10 to 100 nm.
- the total pore specific surface area of the pores in the range of diameter 2-9 nm was 17.5 m 2 Zg, and the total pore volume of the pores in the range of diameter 10-: LOOnm was 0.274 mLZg.
- the dehydrated calcium hydroxide powder obtained was degassed with a vacuum pump so that the pressure in the dryer was 0.5 X 10 5 Pa or less, and the moisture content was 0 at a temperature of 180 ° C. It was dried and crushed to 5% by mass or less.
- the obtained calcium hydroxide dry powder had a BET specific surface area power of 7. Om 2 Zg, and the total pore volume of pores in the diameter range of 2 to 100 nm was 0.276 mLZg.
- hydrous calcium hydroxide particles were dried in the same manner as in Example 10. (Dryer pressure: about 1.0 X 10 5 Pa, temperature: 180 ° C, moisture content 0.5 mass% or less The time to reach: 24 hours) was classified and the particle size was adjusted to a range of 2.0 to 5.6 mm.
- the obtained porous hydroxy calcium carbonate particles have a BET specific surface area of 23.5 mVg and a diameter of 2 to: the total pore volume of the pores in the range of LOOnm is 0.260 mL / g, powdered The rate was 0.07 mass%.
- the pore distribution of the obtained porous calcium hydroxide granular material was confirmed by a pore diameter distribution curve Ds (log d) based on the specific surface area, the obtained granular material had a pore diameter of 2 to It was confirmed that pores were distributed with peaks in the range of 9 nm and the range of pore diameters of 10 to 100 nm.
- the total pore specific surface area of pores in the range of diameter 2-9 nm was 15.5 m 2 Zg, and the total pore volume of pores in the range of diameter 10-: LOOnm was 0.244 mLZg.
- Drying of the hydrous calcium hydroxide particles was carried out by changing the pressure in the dryer to about 0.5 X 10 5 Pa and taking 8 hours until the water content became 0.5% by mass or less. Except for the above, a granular material having calcium hydroxide calcium porous particle force was produced in the same manner as in Example 10.
- the resulting porous hydroxyaluminum calcium granule has a BET specific surface area power of 6.6 m 2 / g, diameter 2 to: the total pore volume of pores in the range of LOOnm is 0.316 mL / g, powdered The rate was 0.20% by mass.
- the obtained porous calcium hydroxide granular material had a pore diameter of 2 to It was confirmed that pores were distributed with peaks in the range of 9 nm and the range of pore diameters of 10 to 100 nm.
- the total pore specific surface area of pores in the range of 2-9 nm in diameter was 18.7 m 2 Zg and the total pore volume of pores in the range of 10 to: LOOnm was 0.289 mL / g .
- Drying of the hydrous calcium hydroxide particles was carried out by changing the pressure in the dryer to about 0.5 X 10 5 Pa and taking 8 hours until the water content became 0.5% by mass or less. Except for the above, a granular material having calcium hydroxide porous particle force was produced in the same manner as in Example 11.
- the obtained porous hydroxyaluminum calcium granule has a BET specific surface area power of 1.2 mVg, a diameter of 2 to: the total pore volume in the range of LOOnm is 0.296 mL / g, and the pulverization rate is 0 05% by mass.
- the pore distribution of the obtained porous calcium hydroxide granular material was confirmed by a pore diameter distribution curve Ds (log d) based on the specific surface area, the obtained granular material had a pore diameter of 2 to It was confirmed that pores were distributed with peaks in the range of 9 nm and the range of pore diameters of 10 to 100 nm.
- the total pore specific surface area of the pores in the range of diameter 2-9 nm was 14.5 m 2 Zg, and the total pore volume of the pores in the range of diameter 10-: LOOnm was 0.276 mLZg.
- Drying of the hydrous calcium hydroxide particles was carried out by changing the pressure in the dryer to about 0.5 X 10 5 Pa and taking 8 hours until the water content became 0.5% by mass or less. Except for the above, a granular material having calcium hydroxide porous particle force was produced in the same manner as in Example 12.
- the obtained porous hydroxyaluminum calcium granule has a BET specific surface area of 42.8 m 2 / g, a diameter of 2 to: the total pore volume of pores in the range of LOOnm is 0.313 mL / g, pulverized The rate was 0.05 mass%. Further, when the pore distribution of the obtained porous calcium hydroxide granular material was confirmed by a pore diameter distribution curve Ds (log d) based on the specific surface area, the obtained granular material was It was confirmed that pores were distributed with peaks in the range of pore diameters of 2-9 nm and in the range of pore diameters of 10-100 nm. The total pore specific surface area of the pores in the range of diameter 2-9 nm was 18.6 m 2 Zg, and the total pore volume of the pores in the range of diameter 10-: LOOnm was 0.288 mL / g.
- the BET specific surface area and the diameter of the porous hydroxyaluminum calcium granules produced in Examples 10 to 15 are 2 to: the total pore volume of pores in the range of LOOnm, and Summarize the powdering rate.
- Example 10 28. 7 0. 301 0. 07
- Example 1 1 29. 6 0. 293 0. 08
- Example 12 23. 5 0. 260 0. 07
- Example 13 46. 6 0. 316 0. 20
- Example 14 41. 2 0. 296 0. 05
- Example 15 42. 8 0. 313 0. 05
- FIG. 1 is a configuration diagram showing an example of a halogenated gas fixing process apparatus using the porous acidic calcium calcium particles of the present invention as a fixed processing material.
- FIG. 2 Compositions of Ca and F in the particle cross section of the porous acid-calcium calcium particulate after completion of the fixation treatment by the halide gas fixation treatment apparatus in Example 1, Example 2 and Comparative Example 1.
- the measurement positions are at regular intervals of approximately 1Z4 of the radius of the granular material.
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Claims
Priority Applications (5)
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EP07744655A EP2039655A1 (en) | 2006-06-02 | 2007-06-04 | Porous calcium oxide particulate and porous calcium hydroxide particulate |
US12/303,005 US20090246524A1 (en) | 2006-06-02 | 2007-06-04 | Porous calcium oxide particulate and porous calcium hydroxide particulate |
JP2008520562A JP5148490B2 (ja) | 2006-06-02 | 2007-06-04 | 多孔質酸化カルシウム粒状物及び多孔質水酸化カルシウム粒状物 |
KR1020087031527A KR101383996B1 (ko) | 2006-06-02 | 2007-06-04 | 다공질 산화칼슘 입상물 및 다공질 수산화칼슘 입상물 |
IL195635A IL195635A0 (en) | 2006-06-02 | 2008-12-01 | Porous calcium oxide particulate and porous calcium hydroxide particulate |
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EP (1) | EP2039655A1 (ja) |
JP (1) | JP5148490B2 (ja) |
KR (1) | KR101383996B1 (ja) |
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IL195635A0 (en) | 2009-09-01 |
JPWO2007142192A1 (ja) | 2009-10-22 |
TWI415793B (zh) | 2013-11-21 |
EP2039655A1 (en) | 2009-03-25 |
TW200815287A (en) | 2008-04-01 |
KR101383996B1 (ko) | 2014-04-10 |
US20090246524A1 (en) | 2009-10-01 |
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