CN108187479A - A kind of lime drier and preparation method thereof - Google Patents
A kind of lime drier and preparation method thereof Download PDFInfo
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- CN108187479A CN108187479A CN201810029889.4A CN201810029889A CN108187479A CN 108187479 A CN108187479 A CN 108187479A CN 201810029889 A CN201810029889 A CN 201810029889A CN 108187479 A CN108187479 A CN 108187479A
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- lime
- particle
- hydrophobic material
- preparation
- drier
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- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 152
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 152
- 239000004571 lime Substances 0.000 title claims abstract description 152
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 106
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000003960 organic solvent Substances 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 35
- 239000011259 mixed solution Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 19
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 11
- 239000012188 paraffin wax Substances 0.000 claims description 11
- DCXXMTOCNZCJGO-UHFFFAOYSA-N Glycerol trioctadecanoate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000009834 vaporization Methods 0.000 claims description 9
- 230000008016 vaporization Effects 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 6
- 238000010348 incorporation Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 238000005243 fluidization Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 239000010410 layer Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- 239000002274 desiccant Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 235000013305 food Nutrition 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000005909 ethyl alcohol group Chemical group 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- CKQVRZJOMJRTOY-UHFFFAOYSA-N octadecanoic acid;propane-1,2,3-triol Chemical class OCC(O)CO.CCCCCCCCCCCCCCCCCC(O)=O CKQVRZJOMJRTOY-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Solid Materials (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of lime drier and preparation method thereof, the lime drier is made of lime dry particle；For the lime dry particle using lime particle as core, shell is porous hydrophobic material layer；Lime particle diameter size is 0.1~0.4mm；The weight ratio of the lime particle and hydrophobic material is 1:0.01~0.05.Lime drier of the present invention, lime particle surface hydrophobic material is coated uniformly, and hydrophobic material consumption is few, at low cost；Lime drier of the present invention effectively recycles organic solvent, can reduce the organic solvents such as energy consumption and alcohol can all volatilize, and will not cause peculiar smell in preparation process simultaneously.
Description
Technical field
The present invention relates to drier fields more particularly to a kind of lime drier and preparation method thereof.
Background technology
Lime drier is food desiccant common in the market, for keeping humidity relatively low in food pack, is prevented
The only moist influence to food quality.However existing lime drier is mostly to be broken for packing after particle by quick lime using,
When lime drier enters in water, lime particle is contacted with water, is chemically reacted, and generates amount of heat, water temperature is made drastically to rise
Height is susceptible to bum accidents.Although some lime drier reduce drier quilt using the higher packaging material of tearing strength
The possibility of opening, but the safety of drier cannot be still improved from root.Thus need to prepare a kind of novel stone
Grey drier hinders the violent chemical reaction come into contact in a large area so as to avoid lime and water of but lime particle and water, in solution
State problem.
Invention content
The purpose of the present invention is to provide a kind of novel lime drier and preparation method thereof, the lime drier of preparation
In lime particle surface there are protective layer, coming into contact in a large area for lime and water is avoided, so as to avoid acutely chemically reacting what is caused
It burns risk.To achieve these goals, the present invention provides following technical solution：A kind of lime drier, the lime drying
Agent is made of lime dry particle；For the lime dry particle using lime particle as core, shell is porous hydrophobic material layer；
Lime particle diameter size is 0.1~0.4mm；The weight ratio of the lime particle and hydrophobic material is 1:0.01~0.05.
Preferably, the hydrophobic material is high-melting-point hydrophobic material；The hydrophobic material includes glycerin monostearate, palm fibre
Palmitic acid is stearic, any in paraffin.
Preferably, the weight ratio of the lime particle and hydrophobic material is 1：0.02.
A kind of preparation method of above-mentioned lime drier, which is characterized in that include the following steps：
1-5 parts by weight hydrophobic material with 95-99 weight parts organic solvents is mixed, stirs to hydrophobic material and be completely dissolved by a
Form mixed solution；
Lime particle and step a mixed solution formed are pressed 3 by b：1~2 weight part ratio mixing, until abundant mixing；
C extracts the lime particle with mixed solution mixing in step b, and the lime particle of extraction is delivered to level-one
Fluid bed；The extra mixed solution filtered out is recycled.
D, level-one fluid bed provide hot wind, dry organic molten in lime particle, vaporization lime particle surface mixed solution
Agent；The organic solvent of vaporization is recycled；Lime particle after drying enters two level fluid bed；
E, two level fluid bed carry out drying and processing again to lime particle；
F collects the dry lime particle of two level fluid bed discharge.
Preferably, organic solvent described in step a includes any in absolute ethyl alcohol, n-hexane.
Preferably, in step a, hydrophobic material and organic solvent mix in the container with stirring slurry, incorporation time 15-
20min, stirring slurry rotating speed are 60r/min.
Preferably, in step b, lime particle and mixed solution mix in auger type mixer, incorporation time 1-
2min。
Preferably, in step d, level-one fluid bed hot wind is 75-80 DEG C of hot wind, is 2- to lime particle drying time
5min。
Preferably, in step e, fluidized-bed temperature is 55-65 DEG C, drying time 10-15min.
Preferably, after step f, by measuring cup type measuring packing machine, the dry lime particle of collection is packed.
The lime drier of the present invention in lime particle outer wrapping hydrophobic material, controls the reaction speed of lime and water,
After lime is made to be contacted with water, the phenomenon that being not in notable heating, injury of burning is avoided.The lime drier of the present invention, lime
Particle surface hydrophobic material is coated uniformly, and hydrophobic material dosage is few, of low cost.Preparation method provided by the invention, using having
Lime dip particle after solvent dissolving hydrophobic material, and more than organic solvent boiling point, fluid bed instantaneously dries drying so that
After organic solvent is acutely vaporized and volatilized, porous hydrophobic layer is formed in lime particle surface；Porous hydrophobic layer can make steam
It slowly penetrates into lime particle, plays within a package, absorb steam, ensure that product is in the environment compared with low humidity, ensure
The mouthfeel of product；It can prevent when lime is steeped in water again simultaneously, water comes into contact in a large area with lime particle, violent chemistry occurs
Reaction generates amount of heat.In addition preparation method of the invention, with two level fluid bed drying technology, had both ensured that organic solvent had
While effect recycling, and energy consumption can be reduced, and ensure the problem of organic solvents such as alcohol can all volatilize, will not cause peculiar smell.
Specific embodiment
For technical staff is made to more fully understand the present invention, below the embodiment of the present invention clearly and detailedly illustrated, but
It is not as a limitation of the invention.Obviously, described embodiment is only the part of the embodiment rather than whole of the present invention
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art institute without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
Present embodiment discloses a kind of lime drier and preparation method thereof, specifically, the lime drier is in particle
Shape, granule core are lime particle, shell package porous hydrophobic material, and the weight ratio of lime particle and outer shell and hydrophobic material is
1：0.02；Its hydrophobic material is palm stearin.The preparation method of lime drier is as follows in this example：
(1) in material-compound tank, 1 part of palm stearin with 99 parts of n-hexanes is mixed, opens stirring slurry, 60r/min mixing
15min until palm stearin is completely dissolved, forms palm stearin and n-hexane mixed solution；
(2) mixed solution in step (1) is pumped into auger type mixer, while lime particle is pressed 3：1 ratio (stone
Grey particle：Palm stearin n-hexane mixed solution) it is transported in auger type mixer by conveyer belt, 2min is mixed, it is fully mixed
It is even；
(3) after step (2), lime particle is filtered out, lime particle is transported in level-one fluid bed；By what is filtered out
Extra palm stearin n-hexane mixed solution blowback is to material-compound tank；
(4) level-one fluid bed leads to 75-80 DEG C of hot wind, dries lime particle and causes in lime particle surface mixed solution just
Hexane vaporizes；Drying time is 2min；The n-hexane of vaporization is recycled by recovery tower；
(5) the lime particle dried in step (4) is discharged into two level fluid bed, dried again, two level fluidized-bed temperature is
55-65 DEG C, drying time 15min；The exhaust gas of two level fluid bed discharge carries out burning disposal；
(6) the dried lime particle of collection step (5), by measuring cup type measuring packing machine, lime grain after packaging is dry
Son.
Technical scheme of the present invention makes lime particle in water by adding hydrophobic material palm stearin in lime particle surface
In will not acutely absorb water, chemically react, generate amount of heat, cause bum accidents.The preparation method of the present embodiment, passes through
Organic solvent-normal hexane dissolves hydrophobic material, palm stearin is enable uniformly to be attached to lime desiccant particle surface, while protect again
It demonstrate,proves lime particle in process, it is unaffected that chemical reactions, the functions of making the moisture absorption of lime particle such as water suction will not be generated.
The preparation method of the present embodiment further includes multiple recycling steps, and hydrophobic material and organic solvent mixed solution are recycled,
The organic solvent of vaporization is recycled, production cost is greatly saved.
Embodiment 2
Present embodiment discloses a kind of lime drier and preparation method thereof, specifically, the lime drier is in particle
Shape, granule core are lime particle, shell package porous hydrophobic material, and the weight ratio of lime particle and outer shell and hydrophobic material is
1：0.03；Its hydrophobic material is glycerin monostearate.The preparation method of lime drier is as follows in this example：
In material-compound tank, 5 parts of glycerin monostearates are mixed with 95 parts of absolute ethyl alcohols by A, open stirring slurry, 60r/min
20min is mixed, until glycerin monostearate is completely dissolved, forms glycerin monostearate and absolute ethyl alcohol mixed solution；
Mixed solution in step A is pumped into auger type mixer by B, while lime particle is pressed 3：1 ratio (lime
Particle：Glycerin monostearate absolute ethyl alcohol mixed solution) it is transported in auger type mixer by conveyer belt, 1min is mixed,
Abundant mixing；
C after stepb, filters out lime particle, lime particle is transported in level-one fluid bed；It is more by what is filtered out
Remaining glycerin monostearate absolute ethyl alcohol mixed solution blowback is to material-compound tank；
D, level-one fluid bed lead to 75-80 DEG C of hot wind, dry lime particle and cause nothing in lime particle surface mixed solution
Water-ethanol vaporizes；Drying time is 5min；The absolute ethyl alcohol of vaporization is recycled by alcohol distillation column；
The lime particle dried in step D is discharged into two level fluid bed, dried again by E, and two level fluidized-bed temperature is 55-
65 DEG C, drying time 10min；The exhaust gas of two level fluid bed discharge carries out burning disposal；
The dried lime particle of F, collection step E, by measuring cup type measuring packing machine, lime particle after packaging is dry.
The lime drier of the present embodiment in lime particle outer wrapping hydrophobic material glycerin monostearate, controls stone
Ash and the reaction speed of water after lime is made to be contacted with water, the phenomenon that being not in notable heating, avoid injury of burning.This implementation
The preparation method that example provides, using lime dip particle after organic solvent absolute ethyl alcohol dissolving glycerin monostearate, and in nothing
More than water-ethanol boiling point, fluid bed instantaneously dries drying so that after organic solvent is acutely vaporized and volatilized, in lime particle surface
Form porous hydrophobic layer；Porous hydrophobic layer can be such that steam slowly penetrates into lime particle, play within a package, absorb water
Vapour ensures that product is in the environment compared with low humidity, ensures the mouthfeel of product；It can prevent when lime is steeped in water again simultaneously,
Water comes into contact in a large area with lime particle, violent chemical reaction occurs, generates amount of heat.In addition preparation method of the invention,
With two level fluid bed drying technology, while not only ensureing that organic solvent effectively recycles, but also energy consumption can be reduced, and ensure that alcohol etc. has
Solvent can all volatilize, the problem of will not causing peculiar smell.
Embodiment 3
Present embodiment discloses a kind of lime drier and preparation method thereof, specifically, the lime drier is in particle
Shape, granule core are lime particle, and shell wraps up hydrophobic material, and multiple holes are distributed in hydrophobic material layer；Lime particle and shell
The weight ratio of hydrophobic material is 1：0.03；Its hydrophobic material is paraffin.The preparation method of lime drier is as follows in this example：
(a) in material-compound tank, 1 part of paraffin is mixed with 99 parts of n-hexanes, unlatching stirring slurry, 60r/min mixing 15min,
It is completely dissolved to paraffin, forms paraffin and n-hexane mixed solution；
(b) mixed solution in step (a) is pumped into auger type mixer, while lime particle is pressed 3：2 ratio (stone
Grey particle：Paraffin n-hexane mixed solution) it is transported in auger type mixer by conveyer belt, mix 2min, abundant mixing；
(c) after step (b), lime particle is filtered out, lime particle is transported in level-one fluid bed；By what is filtered out
Extra paraffin n-hexane mixed solution blowback is to material-compound tank；
(d) level-one fluid bed leads to 75-80 DEG C of hot wind, dries lime particle and causes in lime particle surface mixed solution just
Hexane vaporizes；Drying time is 2min；The n-hexane of vaporization is recycled by recovery tower；
(e) the lime particle dried in step (d) is discharged into two level fluid bed, dried again, two level fluidized-bed temperature is
55-65 DEG C, drying time 15min；The exhaust gas of two level fluid bed discharge carries out burning disposal；
(f) the dried lime particle of collection step (e), by measuring cup type measuring packing machine, lime grain after packaging is dry
Son.
The technical solution of the present embodiment makes lime particle in water by adding hydrophobic material paraffin in lime particle surface
It will not acutely absorb water, chemically react, generate amount of heat, cause bum accidents.The preparation method of the present embodiment, by having
Solvent n-hexane dissolution hydrophobic material enables paraffin to be uniformly attached to lime desiccant particle surface, while ensures lime again
Particle in process, it is unaffected will not to generate chemical reactions, the functions of making the moisture absorption of lime particle such as water suction.This implementation
The preparation method of example further includes multiple recycling steps, including being recycled to paraffin n-hexane mixed solution, having just to vaporization
Hexane is recycled, and production cost is greatly saved.
Embodiment 4
Present embodiment discloses a kind of lime drier, lime drier is in granular form, and granule core is lime particle, outside
Shell wraps up hydrophobic material, and multiple holes are distributed in hydrophobic material layer；The weight ratio of lime particle and outer shell and hydrophobic material is 1：0.01；
Lime particle diameter size is 0.4mm.
Embodiment 5
Present embodiment discloses a kind of lime drier, lime drier is made of lime dry particle, and granule core is
Multiple holes are distributed in lime particle, shell package hydrophobic material, hydrophobic material layer；The weight of lime particle and outer shell and hydrophobic material
Than being 1：0.05；Lime particle diameter size is 0.1mm.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, the technology extension or recreation made using description of the present invention are included in the patent of the present invention
In protection domain.
Claims (10)
1. a kind of lime drier, which is characterized in that the lime drier is made of lime dry particle；The lime drying
For particle using lime particle as core, shell is porous hydrophobic material layer；Lime particle diameter size is 0.1~0.4mm；It is described
The weight ratio of lime particle and hydrophobic material is 1:0.01~0.05.
2. lime drier according to claim 1, which is characterized in that the hydrophobic material is high-melting-point hydrophobic material；
The hydrophobic material includes any in glycerin monostearate, palm stearin, paraffin.
3. lime drier according to claim 1, which is characterized in that the weight ratio of the lime particle and hydrophobic material
It is 1：0.02.
4. a kind of preparation method of any lime drier of claim 1-3, which is characterized in that include the following steps：
1-5 parts by weight hydrophobic material with 95-99 weight parts organic solvents is mixed, stirs to hydrophobic material to be completely dissolved to be formed by a
Mixed solution；
Lime particle and step a mixed solution formed are pressed 3 by b：1~2 weight part ratio mixing, until abundant mixing；
C extracts the lime particle with mixed solution mixing in step b, and the lime particle of extraction is delivered to level-one fluidisation
Bed；The extra mixed solution filtered out is recycled.
D, level-one fluid bed provide hot wind, dry the organic solvent in lime particle, vaporization lime particle surface mixed solution；It is right
The organic solvent of vaporization is recycled；Lime particle after drying enters two level fluid bed；
E, two level fluid bed carry out drying and processing again to lime particle；
F collects the dry lime particle of two level fluid bed discharge.
5. the preparation method of lime drier according to claim 4, which is characterized in that organic solvent packet described in step a
It includes any in absolute ethyl alcohol, n-hexane.
6. the preparation method of lime drier according to claim 5, which is characterized in that in step a, hydrophobic material and organic
Solvent mixes in the container with stirring slurry, incorporation time 15-20min, and stirring slurry rotating speed is 60r/min.
7. the preparation method of lime drier according to claim 4, which is characterized in that in step b, lime particle and mixing
Solution mixes in auger type mixer, incorporation time 1-2min.
8. the preparation method of lime drier according to claim 4, which is characterized in that in step d, level-one fluid bed hot wind
It is 2-5min to lime particle drying time for 75-80 DEG C of hot wind.
9. the preparation method of lime drier according to claim 4, which is characterized in that in step e, fluidized-bed temperature is
55-65 DEG C, drying time 10-15min.
10. the preparation method of lime drier according to claim 4, which is characterized in that after step f, pass through measuring cup
Formula measuring packing machine packs the dry lime particle of collection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029889.4A CN108187479B (en) | 2018-01-12 | 2018-01-12 | Lime drying agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029889.4A CN108187479B (en) | 2018-01-12 | 2018-01-12 | Lime drying agent and preparation method thereof |
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| CN108187479A true CN108187479A (en) | 2018-06-22 |
| CN108187479B CN108187479B (en) | 2020-10-23 |
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