CN113213494A - Method for producing white carbon black by alkaline leaching desilication slag with waste denitration catalyst - Google Patents
Method for producing white carbon black by alkaline leaching desilication slag with waste denitration catalyst Download PDFInfo
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- CN113213494A CN113213494A CN202110509712.6A CN202110509712A CN113213494A CN 113213494 A CN113213494 A CN 113213494A CN 202110509712 A CN202110509712 A CN 202110509712A CN 113213494 A CN113213494 A CN 113213494A
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- silicic acid
- carbon black
- white carbon
- denitration catalyst
- alkaline leaching
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000002893 slag Substances 0.000 title claims abstract description 30
- 239000006229 carbon black Substances 0.000 title claims abstract description 29
- 238000002386 leaching Methods 0.000 title claims abstract description 25
- 239000002699 waste material Substances 0.000 title claims abstract description 24
- 239000003054 catalyst Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 40
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 39
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002244 precipitate Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 230000029219 regulation of pH Effects 0.000 claims abstract description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid group Chemical group C(C(=O)O)(=O)O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 7
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 6
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 4
- 239000011975 tartaric acid Substances 0.000 claims description 4
- 235000002906 tartaric acid Nutrition 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 11
- 239000003814 drug Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000002920 hazardous waste Substances 0.000 abstract description 2
- 238000011112 process operation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 239000003513 alkali Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000012065 filter cake Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000000967 suction filtration Methods 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000003828 vacuum filtration Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- UVGLBOPDEUYYCS-UHFFFAOYSA-N silicon zirconium Chemical compound [Si].[Zr] UVGLBOPDEUYYCS-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
-
- 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
- C01P2006/12—Surface area
-
- 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
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
-
- 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
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Silicon Compounds (AREA)
Abstract
The invention discloses a method for producing white carbon black by alkaline leaching desilication residues with a waste denitration catalyst, which comprises the following steps: s1: mixing the waste denitration catalyst alkaline leaching desilication residue with softened water in a ratio of 1: 3-5, and heating to 60-80 ℃ to form silicon slag slurry; s2: adding a pH regulator into the silicon slag slurry to regulate the pH to 0.5-1.5 to obtain a pH regulation slurry; s3: filtering the pH adjusting slurry to obtain crude silicic acid precipitate; s4: mixing the crude silicic acid precipitate with hydrochloric acid solution with the content of 3% -5%, adding 0.1% -0.5% of dispersing agent, stirring at normal temperature, washing, standing for 4-8 hours, and filtering and separating by a centrifuge to obtain washing silicic acid; s5: washing silicic acid, and drying at 100 ℃ to obtain the high-quality white carbon black. The method for producing the white carbon black by using the alkaline leaching desiliconized slag has the advantages of low energy consumption, low medicament consumption, low cost and simple process operation, can improve the economic benefit and simultaneously recycle and reduce hazardous wastes, and plays a good ecological and environment-friendly benefit.
Description
Technical Field
The invention relates to the field of uniaxial compression tests of transparent rock masses, in particular to a method for producing white carbon black by using alkali-leaching desilication slag of a waste denitration catalyst.
Background
White carbon black is an older variety of silicon compounds and is white highly dispersed amorphous powder or flocculent powder in appearance. The internal surface area is large, the application is wide, the dispersing power in the crude rubber is large, and the rubber can be used as a reinforcing filler, a thickening agent or a thickening agent of rubber, plastics and the like, a blending agent and a delustering agent of paint, a casting release agent and the like.
The production method of the white carbon black mainly comprises a precipitation method and a gas phase method. The raw materials used in the precipitation method are cheap and easy to obtain, the production process and equipment are simpler, and the product has low price and occupies the leading position of production. At present, the raw materials for preparing the white carbon black mainly comprise fly ash, coal gangue, bentonite, silicon tetrafluoride in phosphate fertilizer plants, copper-smelting water slag or iron-smelting water slag, zirconium silicon slag, wollastonite and the like.
The traditional precipitation method adopts quartz sand, soda ash, industrial hydrochloric acid or sulfuric acid or carbon dioxide. The process route is mainly as follows: the industrial water glass is prepared by reacting quartz sand with soda ash at high temperature, the industrial water glass is prepared into dilute solution with certain concentration by using water, then certain acid is added under certain conditions to precipitate silicon dioxide, and then the product white carbon black is prepared by cleaning, filtering, drying and crushing. However, the method has the problems of high medicament cost, high water treatment cost, high energy consumption, complex operation, high wastewater treatment difficulty and the like.
The waste denitration catalyst contains 3-6% of silicon, in the resource utilization process, the alkali is added for roasting to extract tungsten and vanadium, the alkali leaching solution contains silicon with higher concentration, alkali leaching desilication slag is generated in the purification process, and the desilication slag contains aluminum, titanium, sodium, magnesium, tungsten, trace heavy metals and other impurity elements, which belongs to dangerous waste, but at present, no good treatment method is available for the desilication slag, and the environment can be greatly influenced after the desilication slag is discarded.
Disclosure of Invention
In order to solve the problems, the invention provides a method for producing white carbon black by using waste denitration catalyst alkaline leaching desilication slag, which has the advantages of low energy consumption, low medicament consumption, low cost and simple process operation, can improve the economic benefit and simultaneously recycle and reduce hazardous waste, and has good ecological and environment-friendly benefits.
The invention is realized by the following technical scheme:
a method for producing white carbon black by using waste denitration catalyst alkaline leaching desilication slag comprises the following steps:
s1: mixing the waste denitration catalyst alkaline leaching desilication residue with softened water in a ratio of 1: 3-5, and heating to 60-80 ℃ to form silicon slag slurry;
s2: adding a pH regulator into the silicon slag slurry to regulate the pH to 0.5-1.5 to obtain a pH regulation slurry;
s3: filtering the pH adjusting slurry to obtain crude silicic acid precipitate;
s4: mixing the crude silicic acid precipitate with hydrochloric acid solution with the content of 3% -5%, adding 0.1% -0.5% of dispersing agent, stirring at normal temperature, washing, standing for 4-8 hours, and filtering and separating by a centrifuge to obtain washing silicic acid;
s5: mixing 60 ℃ softened water in a ratio of 1: spraying a small amount of the mixture in a ratio of 1-1:2 into a centrifuge for multiple times, and centrifuging for multiple times to obtain pure silicic acid;
s6: and drying the pure silicic acid at 100 ℃ to obtain the high-quality white carbon black.
The pH regulator adopts oxalic acid, citric acid or tartaric acid.
Mixing 60 ℃ softened water in a ratio of 1: 1-2, spraying on the washing silicic acid obtained in step S4 in a centrifuge for multiple times in a small amount, and centrifuging for multiple times to obtain pure silicic acid; drying the pure silicic acid.
The dosage ratio of the hydrochloric acid to the crude silicic acid precipitate is 1: 10-20, wherein the dosage ratio of the dispersing agent to the crude silicic acid precipitate is 1: 20-100.
The dispersant is sodium dodecyl sulfate.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the method for producing the white carbon black by using the waste denitration catalyst alkaline leaching desiliconized slag, the waste denitration catalyst alkaline leaching desiliconized slag is used as a raw material, and the white carbon black can be prepared by adding less acid, so that the waste is changed into valuable, the energy consumption and the medicament cost are low, and the operation is simple;
2. according to the method for producing the white carbon black by using the waste denitration catalyst alkaline leaching desilication residue, only a part of the PH regulator and the hydrochloric acid are needed to be added in the whole process, the harmfulness of the generated waste liquid is small, the treatment is simple, and good ecological and environment-friendly benefits are achieved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Example 1
200g of waste denitration catalyst alkali leaching desilication slag is mixed with 600mL of softened water and fully stirred (350r/min), the temperature is increased to 80 ℃, oxalic acid is added after 0.5 hour to adjust the pH value to 0.5, the temperature is kept and stirring is carried out continuously, and crude silicic acid precipitate is obtained by suction filtration in a vacuum filtration bottle after 1 hour; mixing the crude silicic acid precipitate with 600mL of 3% hydrochloric acid and 0.5% sodium dodecyl sulfate solution, stirring at normal temperature for 2 hours, standing for 8 hours, then pouring out supernatant, and vacuum filtering the residual slurry to obtain washing silicic acid; spraying softened water of 60 ℃ on the filter cake for a few times, and filtering and separating; and finally, drying the obtained pure silicic acid in a vacuum drying oven at 100 ℃, and grinding to obtain the white carbon black product.
Example 2
200g of waste denitration catalyst alkali leaching desilication slag is mixed with 600mL of softened water and fully stirred (350r/min), the temperature is raised to 60 ℃, citric acid is added after 0.5 hour to adjust the pH value to 1, the temperature is kept and stirring is carried out continuously, and after 1 hour, a vacuum filtration bottle is adopted for suction filtration to obtain crude silicic acid precipitate; mixing the crude silicic acid precipitate with 600mL of 5% hydrochloric acid and 0.3% sodium dodecyl sulfate solution, stirring at normal temperature for 2 hours, standing for 8 hours, then pouring out supernatant, and vacuum filtering the residual slurry to obtain washing silicic acid; spraying softened water of 60 ℃ on the filter cake for a few times, and filtering and separating; and finally, drying the obtained pure silicic acid in a vacuum drying oven at 100 ℃, and grinding to obtain the white carbon black product.
Example 3
200g of waste denitration catalyst alkali leaching desilication slag is mixed with 600mL of softened water and fully stirred (350r/min), the temperature is increased to 80 ℃, tartaric acid is added after 0.5 hour to adjust the pH value to 0.5, the temperature is kept and stirring is carried out continuously, and crude silicic acid precipitate is obtained by suction filtration in a vacuum suction bottle after 1 hour; mixing the crude silicic acid precipitate with 600mL of 4% hydrochloric acid and 0.5% sodium dodecyl sulfate solution, stirring at normal temperature for 2 hours, standing for 8 hours, then pouring out supernatant, and vacuum filtering the residual slurry to obtain washing silicic acid; spraying softened water of 60 ℃ on the filter cake for a few times, and filtering and separating; and finally, drying the obtained pure silicic acid in a vacuum drying oven at 100 ℃, and grinding to obtain the white carbon black product.
Example 4
200g of waste denitration catalyst alkali leaching desilication slag is mixed with 600mL of softened water and fully stirred (350r/min), the temperature is increased to 80 ℃, tartaric acid is added after 0.5 hour to adjust the pH value to 1, the mixture is kept warm and continuously stirred, and after 1 hour, a vacuum filtration bottle is adopted for suction filtration to obtain crude silicic acid precipitate; mixing the crude silicic acid precipitate with 600mL of 3% hydrochloric acid and 0.5% sodium dodecyl sulfate solution, stirring at normal temperature for 2 hours, standing for 8 hours, then pouring out supernatant, and vacuum filtering the residual slurry to obtain washing silicic acid; spraying softened water of 60 ℃ on the filter cake for a few times, and filtering and separating; and finally, drying the obtained pure silicic acid in a vacuum drying oven at 100 ℃, and grinding to obtain the white carbon black product.
The white carbon black powder prepared in the examples 1 to 4 is SiO of the product according to the requirements of the chemical industry standard HG/T3061-2The purity, specific surface area, total iron content, color, pH, heating loss and ignition loss were tested and the results are given in the following table:
from the results, it can be seen that the main indexes of the white carbon black prepared by the invention all meet the requirements of the chemical industry standard HG/T3061-one 2009.
Therefore, the waste denitration catalyst alkaline leaching desiliconized slag is used as a raw material, the white carbon black meeting the requirements can be prepared by adding less acid, waste materials are changed into valuable materials, the energy consumption and the medicament cost are low, and the operation is simple; meanwhile, only partial PH regulator and hydrochloric acid are needed to be added in the whole process, the produced waste liquid has small harmfulness and simple treatment, and good ecological and environmental protection benefits are achieved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A method for producing white carbon black by using waste denitration catalyst alkaline leaching desilication slag is characterized by comprising the following steps:
s1: mixing the waste denitration catalyst alkaline leaching desilication residue with softened water in a ratio of 1: 3-5, and heating to 60-80 ℃ to form silicon slag slurry;
s2: adding a pH regulator into the silicon slag slurry to regulate the pH to 0.5-1.5 to obtain a pH regulation slurry;
s3: filtering the pH adjusting slurry to obtain crude silicic acid precipitate;
s4: mixing the crude silicic acid precipitate with hydrochloric acid solution with the content of 3% -5%, adding 0.1% -0.5% of dispersing agent, stirring at normal temperature, washing, standing for 4-8 hours, and filtering and separating by a centrifuge to obtain washing silicic acid;
s5: washing silicic acid, and drying at 100 ℃ to obtain the high-quality white carbon black.
2. The method for producing white carbon black by using the spent denitration catalyst alkaline leaching desilication slag as claimed in claim 1, wherein the pH regulator is oxalic acid, citric acid or tartaric acid.
3. The method for producing white carbon black by using the spent denitration catalyst alkaline leaching desilication slag as claimed in claim 1, wherein the ratio of 60 ℃ softened water to 1: 1-2, spraying on the washing silicic acid obtained in step S4 in a centrifuge for multiple times in a small amount, and centrifuging for multiple times to obtain pure silicic acid; drying the pure silicic acid.
4. The method for producing white carbon black by using the spent denitration catalyst alkaline leaching desilication residue as claimed in claim 1, wherein the dosage ratio of the hydrochloric acid solution to the crude silicic acid precipitate is 1: 10-20, wherein the dosage ratio of the dispersing agent to the crude silicic acid precipitate is 1: 20-100.
5. The method for producing white carbon black by using the spent denitration catalyst alkaline leaching desilication slag as claimed in claim 1, wherein the dispersant is sodium dodecyl sulfate.
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|---|---|---|---|---|
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| US20180169636A1 (en) * | 2015-08-18 | 2018-06-21 | Bp Corporation North America Inc. | Desilicated zsm-5 catalysts for xylene isomerization |
| CN110385044A (en) * | 2019-07-24 | 2019-10-29 | 中国科学院过程工程研究所 | A kind of method of useless SCR catalyst dearsenification desiliconization |
| CN112408397A (en) * | 2020-10-21 | 2021-02-26 | 斯瑞尔环境科技股份有限公司 | Method for producing white carbon black for high oil absorption rubber by using waste catalyst |
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2021
- 2021-05-11 CN CN202110509712.6A patent/CN113213494A/en active Pending
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|---|---|---|---|---|
| CN1121098A (en) * | 1995-01-17 | 1996-04-24 | 魏晓军 | Method for production of silica white using industrial sludge |
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| WO2013155975A1 (en) * | 2012-04-19 | 2013-10-24 | 浙江宇达化工有限公司 | Preparation method for precipitated silica |
| CN104709911A (en) * | 2015-03-04 | 2015-06-17 | 江苏理工学院 | Electric furnace waste residue comprehensive utilization method |
| US20180169636A1 (en) * | 2015-08-18 | 2018-06-21 | Bp Corporation North America Inc. | Desilicated zsm-5 catalysts for xylene isomerization |
| CN105197940A (en) * | 2015-10-09 | 2015-12-30 | 中国地质大学（武汉） | Method for preparing white carbon black from water-quenched blast furnace slag |
| CN110385044A (en) * | 2019-07-24 | 2019-10-29 | 中国科学院过程工程研究所 | A kind of method of useless SCR catalyst dearsenification desiliconization |
| CN112408397A (en) * | 2020-10-21 | 2021-02-26 | 斯瑞尔环境科技股份有限公司 | Method for producing white carbon black for high oil absorption rubber by using waste catalyst |
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