CN101301602B - Method for preparing gaseous mercury absorbing and purifying agent - Google Patents
Method for preparing gaseous mercury absorbing and purifying agent Download PDFInfo
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- CN101301602B CN101301602B CN2008100580393A CN200810058039A CN101301602B CN 101301602 B CN101301602 B CN 101301602B CN 2008100580393 A CN2008100580393 A CN 2008100580393A CN 200810058039 A CN200810058039 A CN 200810058039A CN 101301602 B CN101301602 B CN 101301602B
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- vermiculite
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 64
- 239000006096 absorbing agent Substances 0.000 title claims description 5
- 239000012629 purifying agent Substances 0.000 title claims description 5
- 238000000034 method Methods 0.000 title description 6
- 239000010455 vermiculite Substances 0.000 claims abstract description 23
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 23
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 23
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000003463 adsorbent Substances 0.000 claims description 25
- 239000000126 substance Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 14
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 239000002250 absorbent Substances 0.000 abstract description 4
- 230000002745 absorbent Effects 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 2
- 230000003213 activating effect Effects 0.000 abstract 1
- 238000012824 chemical production Methods 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 239000002594 sorbent Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 14
- 239000003546 flue gas Substances 0.000 description 14
- 239000003245 coal Substances 0.000 description 9
- 229910021536 Zeolite Inorganic materials 0.000 description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000010457 zeolite Substances 0.000 description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000006317 isomerization reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000885822 Spinturnix psi Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000005899 aromatization reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- BKBMACKZOSMMGT-UHFFFAOYSA-N methanol;toluene Chemical compound OC.CC1=CC=CC=C1 BKBMACKZOSMMGT-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Abstract
The present invention relates to a preparation of an absorbent for absorbing and purifying the gaseous elementary mercury, which is made from the vermiculite which is modified by hydrochloric acid, namely, mixing 2-6 mol/L hydrochloric acid and the vermiculite as the solid-to-liquid ratio of 1:2-4,laying for 6-8 hours, putting the mixture into the mill furnace at the temperature of 105-110 degreeC, activating for 20-24 hours, taking out and grinding to less than 200 meshes, drying in the mill furnace until the water ratio is less than 5%, and then the modified vermiculite adsorption is obtained. The absorption effect of the sorbent of the present invention is better than the active carbon for trace gaseity elementary mercury in the coom smoke gas or the other industrial tail gas. When purifying the tail gas containing elementary mercury less than 100ug/m<3>, the absorption capability of the elementary mercury can reach 3.2ug/g-6.0ug/g. The preparation of the present invention is especially used for occasions need to control mercury in the tail gas, such as coal-fired power plant, garbage incinerator and some chemical production factories.
Description
One, technical field
The present invention relates to a kind of gaseous elemental mercury removing pollutant treatment technology.The preparation field that belongs to chemosorbent.
Two, background technology
Mercury is trace element in coal, but the environmental pollution that it may cause but is the problem of people's special concern.The nearest data analysis of U.S. environmental protection general administration and the United Nations shows, the annual discharging naturally in the whole world and anthropogenic discharge's mercury approximately are 4400-7500t, wherein U.S. anthropogenic discharge mercury accounts for 3% (132-225t/yr) of the total mercury emissions in the whole world greatly, wherein the discharging of coal-burning power plant's mercury accounts for 1% of the total mercury emissions in the whole world, promptly accounts for 33% (44-75t/yr) of the artificial mercury emissions of the U.S..The mercury that discharges from coal-burning boiler has three kinds of forms: simple substance mercury (Hg
0), the mercury (Hg of oxidation state
+And Hg
2+) and the mercury of particulate form.Because mercuric compound has very high water-soluble, particle mercury can be caught by deduster, so the mercury of these two kinds of forms is removed than being easier to relatively, and simple substance mercury is owing to pass through the atmosphere transportation of long distance easily in atmosphere, and form global mercury pollution, its mean residence time in atmosphere reaches half a year to two year, is one of form the most rambunctious.Therefore, to being controlled to of simple substance mercury pollution the emphasis and the difficult point of current research.On March 15th, 2005, Environmental Protection Agency has announced " atmosphere cleaning mercury bill ", purpose is exactly the emission problem of long-term control coal-burning power plant mercury, target is controlled within 38 tons to mercury emission in 2010 exactly, be controlled within 15 tons to mercury emission in 2018, discharge capacity than 1999 nearly reduces 70%.
As primary energy, its mode of utilizing mainly is burning in China at China's coal, and annual 84% of the coal of producing of China is directly used in burning.For a long time, the ratio of coal in China's energy consumption structure is very high always.According to prediction, by 2015, coal also will account for 62.6%, even to the year two thousand fifty, coal still accounts for more than 50%.So not only present, and in a quite long period, China will be difficult to change based on the energy consumption structure of coal.The pollution control problem that this shows coal-fired mercury is the SO that continues
2Get the problem of human concern with another fiducial value after the NOx.
The domestic and international at present control method to gaseous state trace simple substance mercury mainly concentrates on adsorbents adsorb and removes the aspect.What wherein study more comparatively maturation is exactly the charcoal absorption technology.Can be by following dual mode with the mercury in the charcoal absorption flue gas: a kind of powdered active carbon that before particulate removal device, sprays into; Another kind is that flue gas is passed through activated carbon adsorption bed.Directly adopt active carbon adsorption removal of mercury efficient higher, also often be injected into some chemical substances in the activated carbon, the common chemical material has the compound of iodine, chlorine, bromine and sulphur etc., in order to the suction-operated of enhanced activity carbon to simple substance mercury.At present removing of simple substance mercury mainly concentrated on the adsorbent Study on Additive.The researcher wishes to increase the adsorbance of adsorbent to simple substance mercury greatly by adding certain reagent, though research has also obtained certain achievement.But owing to utilize charcoal absorption method cost too high, coal fired power plant is difficult to bear, and modified activated carbon has increased the cost of active carbon on the one hand, and the reason owing to technical elements is difficult to large-scale manufacturing again on the other hand.So become the obstacle that this technology is further applied.
In addition, the flying dust that produces in the coal-fired process also can adsorb the mercury in the flue gas, and flying dust also is a key factor that influences the form distribution of mercury in the flue gas.Studies show that the phosphorus content height is very favourable to the absorption of mercury in the flying dust.But also have research to think, the phosphorus content that increases considerably flying dust can not improve the ability of absorption mercury.
Administer the bigger U.S. of research investment at the coal-fired flue-gas mercury pollution, EPA (EPA) has adopted calcium base class material (as CaO, Ca (OH)
2, CaCO
3, CaSO
4.2H
2O etc.) research mercury removes.Discover that calcium base class material has much relations, Ca (OH) to the chemical species that mercury in the removal efficiency of mercury and the flue gas exists
2To HgCL
2Adsorption efficiency can reach 85%, the alkaline adsorbent that contains CaO is to HgCL
2Adsorption effect also fine, but Ca-base adsorbent is but very low to the adsorption efficiency of simple substance mercury.Therefore unsatisfactory to the removal effect of mercury in the coal-fired flue-gas.The research of at present relevant Ca-base adsorbent still is in the laboratory research stage, also is not used for industrial practice.
In the exploitation fume mercury-removing adsorbent, to the removing of mercury, U.S. PSI is with the adsorbent of zeolitic material as the control of Industrial Boiler mercury emissions as adsorbent research for the also useful zeolite of researchers, kaolin, titanium type oxide, noble metal etc.At present just be devoted to find suitable additive, so that increase substantially the adsorption capacity of zeolite to mercury.
In addition, plasma technique also is used to the removal research of coal-fired flue-gas mercury.SO in the plasma treatment coal-fired flue-gas
2, NO
xExisting successful application.Because the concentration of mercury is very low in the coal-fired flue-gas, defy capture, plasma is used for the research of fume mercury-removing and few.
Patent of invention CN1059673A invents a kind of HZSM-5 zeolite/vermiculite catalyst, be a kind of with the zeolite new zeolite catalyst of embedding life on natural vermiculite organically, be applied to the isomerization of dimethylbenzene, contain isomerization, toluene disproportionation, methanol toluene alkylation and the propylene aromatization of the dimethylbenzene of ethylbenzene.
Patent of invention CN101049942A invents a kind of hydrosol of vermiculite and its production and application, can evenly disperse in meeting material, can be applied directly to various material surfaces, material is formed hydrosol of vermiculite of effective protection and its production and application.Be mainly used in the fresh-keeping packaging material of fire-proof heat-insulating material, vegetable and fruit, dyeing waste water, the processing of waste water such as heavy metal-containing waste water.
Three, summary of the invention
One of purpose of the present invention is, a kind of preparation method of gaseous mercury absorbing and purifying agent is provided, and is raw material with the vermiculite, with the salt pickling bath liquor vermiculite is carried out modification and handles, Hg
0Be oxidized to Hg
2+Removed, under 105-110 ℃ of temperature, activated again, obtained being applicable to the adsorbent of coal-fired flue-gas or the central micro-gaseous elemental mercury of other industrial tail gas.To containing simple substance mercury＜100ug/m
3Tail gas clean-up the time, its adsorption capacity to simple substance mercury can reach 3.2ug/g-6.0ug/g.
Two of purpose of the present invention is, the application conditions of above-mentioned adsorbent is provided.
Technical scheme:
The present invention is raw material with the vermiculite, and its chemical component weight percentage is: SiO
237～42%, Al
2O
39～17%, Fe
2O
35～18%, MgO 11～23%, H
2O 5～11%, total amount 100%; Raw material is crushed to less than 120 orders, and the hydrochloric acid that with concentration is 2-6mol/L flooded ageing 6-8 hour then by solid-liquid weight ratio 1: 2-4 and vermiculite mixing and stirring; Place mixture heating furnace under 105-110 ℃ of temperature, to activate 20-24 hour; Taking-up is milled to less than 200 orders then, places resistance furnace to dry to moisture content＜5wt% again, obtains the product adsorbent.
With the prepared adsorbent of the method, to containing micro-simple substance mercury (＜100ug/m
3) tail gas clean-up the time, the adsorption capacity of simple substance mercury can reach 3.2ug/g-6.0ug/g under the normal temperature.
Compare advantage and the good effect that has with known technology:
The present invention adopts the salt pickling bath liquor that vermiculite is carried out modification and handles, thereby the difficult Hg that removes
0Be oxidized to Hg
2+Removed.By studies show that its efficient that removes mercury of vermiculite absorbent after the modification can reach 3.2ug/g-4.8ug/g, PERFORMANCE OF MODIFIED VERMICULITE is favourable to the adsorption capacity of mercury under 120 ℃ of-200 ℃ of high temperature especially, but under this higher temperature, be disadvantageous to charcoal absorption mercury, the optimal adsorption temperature of activated carbon is to be lower than 100 ℃, and actual coal-fired flue-gas after UTILIZATION OF VESIDUAL HEAT IN exhaust temperature about 100 ℃-250 ℃, so utilizing vermiculite is favourable as the adsorbent of coal-fired flue-gas mercury, specific activity carbon has better applicability.This adsorbent can be widely used in the adsorption cleaning of micro-gaseous elemental mercury in high temperature coal flue gas and other industrial waste gases, is specially adapted to the occasion of mercury emissions control in the flue tail gas, as coal-burning power plant, garbage burning boiler and some Chemical Manufacture producers.
Four, the specific embodiment
Further specify the solution of the present invention and effect below by embodiment.
Embodiment 1
With vermiculite chemical component weight percentage be: SiO
2: 32.45%, Al
2O
3: 15.53%, Fe
2O
323.85%, MgO 12.85%, and CaO 2.28%, K
2O 2.36%, H
2Pulverize after the O 10.68% flotation removal of impurities and ground 120 mesh sieves.Taking by weighing the 2g vermiculite adds in 4mol/L hydrochloric acid (the every liter of ≈ 1000 grams) solution of 4.8ml, stir, leave standstill dipping ageing 6 hours, place it in then and place resistance furnace under 105 ℃～110 ℃ temperature, to activate 20h in the container, take out then and be milled to that " 200 orders are positioned over once more to dry by the fire in the resistance furnace to moisture content＜5wt% and obtain the product adsorbent.
Embodiment 2
With drying and crushing after vermiculite (chemical composition is identical with example 1) the flotation removal of impurities, ground 120 mesh sieves.Taking by weighing the 2g vermiculite adds in the 2mol/L hydrochloric acid solution of 5.0ml, stir, leave standstill dipping ageing 8 hours, place it in then and place resistance furnace under 110 ℃ of conditions, to activate 24h in the container, taking-up is milled to less than 200 orders then, is positioned over once more in the resistance furnace and obtains the product adsorbent behind the baking 2h.
Embodiment 3
Press example 1 prepared adsorbent, adsorption conditions is mercury entrance concentration 72.59ug/m
3, the adsorbent granularity is less than 200 orders, reaction velocity 7000hr
-1, adsorption temp is selected 25 ℃-30 ℃ for use, and adsorption capacity is the 5.5ug/g adsorbent, and adsorption capacity only is 1.16ug/g under the unmodified vermiculite original soil similarity condition.
Embodiment 4
Vermiculite absorbent of the present invention and the contrast of acticarbon adsorption capacity.Press example 1 preparation adsorbent, adsorption conditions is mercury entrance concentration 34.8ug/m
3, reaction velocity 7000hr
-1, absorbent particles is all got less than 200 orders, 140 ℃ of reaction temperatures.The active carbon adsorption capacity is the 3.2ug/g adsorbent as a result, and the mercury adsorption capacity of adsorbent of the present invention is the 8.3ug/g adsorbent.
Claims (2)
1. the preparation method of a gaseous mercury absorbing and purifying agent is characterized in that: it is implemented by following technical scheme,
With the vermiculite is raw material, is crushed to less than 120 orders, and the hydrochloric acid that with concentration is 2-6mol/L flooded ageing 6-8 hour then by solid-liquid weight ratio 1: 2-4 and vermiculite mixing and stirring; Place mixture heating furnace under 105-110 ℃ of temperature, to activate 20-24 hour; Taking-up is milled to less than 200 orders then, places resistance furnace to dry to moisture content＜5wt% again, obtains the product adsorbent.
2. the preparation method of gaseous mercury absorbing and purifying agent according to claim 1 is characterized in that, the material chemical component percentage by weight is: SiO
232.45%, Al
2O
315.53%, Fe
2O
323.85%, MgO 12.85%, and CaO 2.28%, K
2O 2.36%, H
2O 10.68%.
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|---|---|---|---|
| CN2008100580393A CN101301602B (en) | 2008-01-18 | 2008-01-18 | Method for preparing gaseous mercury absorbing and purifying agent |
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|---|---|---|---|
| CN2008100580393A CN101301602B (en) | 2008-01-18 | 2008-01-18 | Method for preparing gaseous mercury absorbing and purifying agent |
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| CN101301602B true CN101301602B (en) | 2010-07-21 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143320B (en) * | 2013-03-12 | 2014-09-17 | 山东科技大学 | Active carbon/zeolite shaped composite material for removing elemental mercury in coal-burned flue gas and preparation method thereof |
| CN104741074A (en) * | 2015-04-07 | 2015-07-01 | 石河子大学 | Method for preparing expanded vermiculite adsorbent |
| CN105967319A (en) * | 2016-05-30 | 2016-09-28 | 安庆丰源化工有限公司 | Fluorine chemical wastewater treating agent and preparation method thereof |
| CN108371238A (en) * | 2018-02-10 | 2018-08-07 | 汪逸凡 | A kind of feed takes off mould dose of preparation method |
| CN109012569A (en) * | 2018-07-18 | 2018-12-18 | 东南大学 | A kind of Ca-base adsorbent and preparation method thereof |
| CN110449119A (en) * | 2019-08-07 | 2019-11-15 | 光大生态环境设计研究院有限公司 | Method and device of the preparation for the adsorbent of garbage incinerating power plant |
| CN110614090A (en) * | 2019-09-26 | 2019-12-27 | 杨皓 | Process for activating, deactivating and removing organic matter active carbon by using gas boiler flue gas |
| CN113663641A (en) * | 2021-08-24 | 2021-11-19 | 航天环境工程有限公司 | Preparation method and application of novel mercury removal adsorbent |
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|---|---|
| CN101301602A (en) | 2008-11-12 |
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