CN108928827A - A method of improving white carbon black specific surface area and Kong Rong - Google Patents
A method of improving white carbon black specific surface area and Kong Rong Download PDFInfo
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- CN108928827A CN108928827A CN201810650266.9A CN201810650266A CN108928827A CN 108928827 A CN108928827 A CN 108928827A CN 201810650266 A CN201810650266 A CN 201810650266A CN 108928827 A CN108928827 A CN 108928827A
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- sodium
- carbon black
- white carbon
- surface area
- specific surface
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000006229 carbon black Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 35
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 59
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 59
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 52
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 27
- 239000000243 solution Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 18
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 18
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 15
- 239000004299 sodium benzoate Substances 0.000 claims abstract description 15
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000010790 dilution Methods 0.000 claims abstract description 5
- 239000012895 dilution Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- -1 filtering Substances 0.000 claims abstract description 4
- 238000003801 milling Methods 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims abstract description 3
- 239000012065 filter cake Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 5
- 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 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- FOSBRQMHWFGSCZ-UHFFFAOYSA-I [Si+4].C(C1=CC=CC=C1)(=O)[O-].[Na+].C(C1=CC=CC=C1)(=O)[O-].C(C1=CC=CC=C1)(=O)[O-].C(C1=CC=CC=C1)(=O)[O-].C(C1=CC=CC=C1)(=O)[O-] Chemical compound [Si+4].C(C1=CC=CC=C1)(=O)[O-].[Na+].C(C1=CC=CC=C1)(=O)[O-].C(C1=CC=CC=C1)(=O)[O-].C(C1=CC=CC=C1)(=O)[O-].C(C1=CC=CC=C1)(=O)[O-] FOSBRQMHWFGSCZ-UHFFFAOYSA-I 0.000 claims description 2
- 230000029087 digestion Effects 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 14
- 239000000377 silicon dioxide Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 230000032683 aging Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 229910002026 crystalline silica Inorganic materials 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229910052905 tridymite 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
- C01B33/187—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates
- C01B33/193—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates of aqueous solutions of silicates
-
- 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
- C01P2006/14—Pore volume
Abstract
The invention discloses a kind of methods for improving white carbon black specific surface area and Kong Rong, sodium silicate solid is dissolved with water, filtering, dilution, obtain sodium silicate solution, and the sodium silicate solution is added in sodium benzoate, sodium sulphate and is dissolved, obtain sodium metasilicate mixed liquor, sulfuric acid is added in sodium metasilicate mixed liquor, is constantly stirred to react, until pH value of reaction system is to 6.2-6.5, aged again, filters pressing, washing, drying, milling processing, obtain high-specific surface area and the white carbon black of Kong Rong.This method improves the specific surface area and Kong Rong of white carbon black by the way that sodium benzoate, control pH value in reaction, temperature, stirring and post-treatment condition are added in reaction raw materials.
Description
Technical field
The invention belongs to white carbon black production preparation technical fields, and in particular to a kind of raising white carbon black specific surface area and Kong Rong
Method.
Background technique
White carbon black is the general name of white powder X-ray amorphous silicic acid and silicate product, is primarily referred to as precipitating dioxy
SiClx, fumed silica and superfine silicon dioxide gel also include powdered synthetic aluminium silicate and calcium silicates etc., and composition can
Use SiO2·nH2O indicates, wherein nH2O is existed in the form of surface hydroxyl.
Precipitated silica refers to the silica produced using sulfuric acid, hydrochloric acid, CO2 and waterglass as base stock, master
Want production technology are as follows: reacted by quartz sand with soda ash industrial waterglass is made under the high temperature conditions, waterglass is diluted with water to one
Determine concentration, acid solution is added, generate precipitation of silica, then cleaned, filtering, dry (drying or spraying), crush, product is made
White carbon black.White carbon black exists with unformed micropore powder, is a kind of important industrial chemicals, since it is with good
The characteristics such as absorption, fire-retardant, insulation, suspension, thixotropy, thixotroping, light scattering, surface graft modification are widely used in rubber, raise
The fields such as feed additives, pesticide, adhesive, abluent, plastic functional sexupara material.In precipitated silica preparation process, silicon
The autohemagglutination of acid molecule and the degree of the degree of polymerization determine the particle size of white carbon black product.Existing white carbon black production technology production
The universal specific surface area of product and hole hold it is relatively low, performance is not high.
Summary of the invention
The purpose of the invention is to overcome drawbacks described above, a kind of side for improving white carbon black specific surface area and Kong Rong is provided
More bigger serface and the white carbon black of Kong Rong can be made by this method in method.
The purpose of the present invention is achieved by the following technical scheme:
A method of it improving white carbon black specific surface area and Kong Rong, sodium silicate solid is dissolved with water, filter, dilute, obtain silicon
Sodium benzoate, sodium sulphate are added the sodium silicate solution and dissolved, obtained sodium metasilicate mixed liquor, silicon is added in sulfuric acid by acid sodium solution
In sour sodium mixed liquor, constantly it is stirred to react, until pH value of reaction system is to 6.2-6.5, then it is aged, filters pressing, washing, dry
Dry, milling processing, obtains high-specific surface area and the white carbon black of Kong Rong.
Further, the method specifically comprises the following steps:
(1) sodium metasilicate mixed liquor is prepared
Sodium silicate solid is added to the water, heating dissolves sodium silicate solid, and it is filtered to remove insoluble impurity, is diluted with water,
Sodium silicate solution is obtained, sodium benzoate, sodium sulphate are added into the sodium silicate solution, obtains sodium metasilicate mixed liquor；
(2) it reacts
Sulfuric acid is added in the sodium metasilicate mixed liquor obtained to step (1), sulfuric acid is initially added speed control in reactant
The pH value of system stops that sulfuric acid is added when the pH value of reaction system is between 6.2-6.5, is aged, reacted between 8-8.5
It is stirred continuously in the process；
(3) it post-processes
The silica slurry obtained after step (2) reaction carries out filters pressing, and filter cake is washed with water, then done
It is dry, milling to get.
Further, in the step (1), the weight ratio of sodium silicate solid and water is 1:1, heating temperature 80-90
℃；
The concentration for being diluted with water rear sodium silicate solution is 13-18wt%.
Further, in the step (1), the concentration difference of sodium benzoate, sodium sulphate in the sodium metasilicate mixed liquor
For 20-30g/L and 30-50g/L；
The temperature of the sodium metasilicate mixed liquor is controlled at 80-90 DEG C.
Further, in the step (2), the concentration of sulfuric acid is 30wt%.
Further, in the step (2), reaction process temperature is controlled at 80-90 DEG C；
Stirring rate is 800rpm.
Further, in the step (2), digestion time 20-30min.
Further, in the step (3), drying carries out 8-10h at 170-180 DEG C.
The method provided by the invention for improving white carbon black specific surface area and Kong Rong using sulfuric acid and sodium metasilicate as reaction raw materials,
Reaction bottom material is sodium silicate aqueous solution, and sodium benzoate and sodium sulphate are added in advance in bottom material.Sulfuric acid is added into reaction bottom material, instead
The initial pH value of system is answered to control between 8-8.5, the reaction rate of sulfuric acid and sodium metasilicate is very fast in the pH value range, bottom material
In sodium sulphate be added in advance can speed up the generation of silicic acid.The silicic acid of generation occurs autohemagglutination and generates silica, sodium benzoate energy
Enough in conjunction with the silica generated, there are a large amount of crystalline silica nuclei in reaction system, give birth to silicon dioxide granule rapidly
Long, under conditions of 80-90 DEG C of high temperature and quickly stirring, silicon dioxide granule is not easy to form biggish white carbon black particle, thus
The specific surface area of white carbon black is improved, the white carbon black skeleton surface after high temperature drying forms micropore, improves the Kong Rong of white carbon black.
The invention has the following advantages:
The method provided by the invention for improving white carbon black specific surface area and Kong Rong, by the way that benzoic acid is added in reaction raw materials
Sodium, control pH value in reaction, temperature, stirring and post-treatment condition, improves the specific surface area and Kong Rong of white carbon black.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described, it should be understood that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Embodiment 1
A kind of production method of white carbon black, weighs sodium silicate solid 100kg, is put into 100kg water, is heated to 80-90 DEG C
It dissolves sodium silicate solid sufficiently, is filtered to remove insoluble impurity.Add water into sodium silicate solution, solution, which is diluted to concentration, is
13wt%.Be separately added into sodium benzoate, sodium sulphate according to the volume of sodium silicate solution after dilution, sodium benzoate and sodium sulphate it is dense
Degree is respectively 20g/L and 30g/L, obtains sodium metasilicate mixed liquor, controls the temperature of sodium metasilicate mixed liquor at 80-90 DEG C.To sodium metasilicate
In mixed liquor be added 30wt% sulfuric acid, sulfuric acid be added speed control initial reaction system pH value between 8-8.5, with
The addition system reaction system of sulfuric acid gradually decrease, until pH value of reaction system stops that sulfuric acid, ageing is added when being down to 6.2-6.5
20min.The temperature control of reaction system is stirred continuously at 80-90 DEG C, and with the rate of 800rpm in reaction and ageing process.Instead
Filters pressing is carried out after silica feed liquid cooling after answering, filter cake washes with water, the impurity such as the sodium sulphate in filter cake are removed,
10h drying is heated at 170 DEG C, is ground up to white carbon black.
Specific surface area according to the method measurement product of HG/T3073-1999 is 215.5 ㎡/g, according to ISO 15901-1-
The Kong Rongwei 2.2mL/g of 2005 method measurement product.
Embodiment 2
A kind of production method of white carbon black, weighs sodium silicate solid 100kg, is put into 100kg water, is heated to 80-90 DEG C
It dissolves sodium silicate solid sufficiently, is filtered to remove insoluble impurity.Add water into sodium silicate solution, solution, which is diluted to concentration, is
15wt%.Be separately added into sodium benzoate, sodium sulphate according to the volume of sodium silicate solution after dilution, sodium benzoate and sodium sulphate it is dense
Degree is respectively 25g/L and 40g/L, obtains sodium metasilicate mixed liquor, controls the temperature of sodium metasilicate mixed liquor at 80-90 DEG C.To sodium metasilicate
In mixed liquor be added 30wt% sulfuric acid, sulfuric acid be added speed control initial reaction system pH value between 8-8.5, with
The addition system reaction system of sulfuric acid gradually decrease, until pH value of reaction system stops that sulfuric acid, ageing is added when being down to 6.2-6.5
25min.The temperature control of reaction system is stirred continuously at 80-90 DEG C, and with the rate of 800rpm in reaction and ageing process.Instead
Filters pressing is carried out after silica feed liquid cooling after answering, filter cake washes with water, the impurity such as the sodium sulphate in filter cake are removed,
8h drying is heated at 180 DEG C, is ground up to white carbon black.
Specific surface area according to the method measurement product of HG/T3073-1999 is 233.6 ㎡/g, according to ISO 15901-1-
The Kong Rongwei 2.8mL/g of 2005 method measurement product.
Embodiment 3
A kind of production method of white carbon black, weighs sodium silicate solid 100kg, is put into 100kg water, is heated to 80-90 DEG C
It dissolves sodium silicate solid sufficiently, is filtered to remove insoluble impurity.Add water into sodium silicate solution, solution, which is diluted to concentration, is
18wt%.Be separately added into sodium benzoate, sodium sulphate according to the volume of sodium silicate solution after dilution, sodium benzoate and sodium sulphate it is dense
Degree is respectively 30g/L and 50g/L, obtains sodium metasilicate mixed liquor, controls the temperature of sodium metasilicate mixed liquor at 80-90 DEG C.To sodium metasilicate
In mixed liquor be added 30wt% sulfuric acid, sulfuric acid be added speed control initial reaction system pH value between 8-8.5, with
The addition system reaction system of sulfuric acid gradually decrease, until pH value of reaction system stops that sulfuric acid, ageing is added when being down to 6.2-6.5
30min.The temperature control of reaction system is stirred continuously at 80-90 DEG C, and with the rate of 800rpm in reaction and ageing process.Instead
Filters pressing is carried out after silica feed liquid cooling after answering, filter cake washes with water, the impurity such as the sodium sulphate in filter cake are removed,
8h drying is heated at 180 DEG C, is ground up to white carbon black.
Specific surface area according to the method measurement product of HG/T3073-1999 is 230.2 ㎡/g, according to ISO 15901-1-
The Kong Rongwei 2.7mL/g of 2005 method measurement product.
Comparative example
The white carbon black production method of comparative example and the difference of embodiment 3 are, do not add benzene in sodium metasilicate mixed liquor mother liquor
Sodium formate.
Specific surface area according to the method measurement product of HG/T3073-1999 is 140.5 ㎡/g, according to ISO 15901-1-
The Kong Rongwei 1.3mL/g of 2005 method measurement product.
Performance test
Rubber product is made in 1-3 of the embodiment of the present invention and the white carbon black of comparative example and natural rubber and other additives.
The performance of gained rubber product is tested.
Using computer system tensile testing machine (GT-TCS-2000) test breaking strength, pull apart elongation percentage and tearing strength.
Test result see the table below.
| Breaking strength MPa | Pull apart elongation percentage % | Tearing strength kN/m | |
| Embodiment 1 | 32.2 | 650 | 185 |
| Embodiment 2 | 33.8 | 680 | 210 |
| Embodiment 3 | 33.4 | 670 | 203 |
| Comparative example | 23.7 | 530 | 128 |
As seen from the above table, the white carbon black of the embodiment of the present invention can be improved the mechanics of rubber due to the addition of sodium benzoate
Performance.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of method for improving white carbon black specific surface area and Kong Rong, which is characterized in that sodium silicate solid is dissolved with water, filtering,
Dilution, obtains sodium silicate solution, and the sodium silicate solution is added in sodium benzoate, sodium sulphate and is dissolved, sodium metasilicate mixed liquor is obtained, by sulphur
Acid is added in sodium metasilicate mixed liquor, is constantly stirred to react, until pH value of reaction system is to 6.2-6.5, then aged, filters pressing,
Washing, dry, milling processing, obtain high-specific surface area and the white carbon black of Kong Rong.
2. the method according to claim 1 for improving white carbon black specific surface area and Kong Rong, which is characterized in that the method tool
Body includes the following steps:
(1) sodium metasilicate mixed liquor is prepared
Sodium silicate solid is added to the water, heating dissolves sodium silicate solid, is filtered to remove insoluble impurity, is diluted with water, obtains silicon
Sodium benzoate, sodium sulphate are added into the sodium silicate solution, obtains sodium metasilicate mixed liquor for acid sodium solution；
(2) it reacts
Sulfuric acid is added in the sodium metasilicate mixed liquor obtained to step (1), sulfuric acid is initially added speed control in reaction system
PH value stops that sulfuric acid is added when the pH value of reaction system is between 6.2-6.5, is aged, reaction process between 8-8.5
In be stirred continuously；
(3) it post-processes
The silica slurry obtained after step (2) reaction carries out filters pressing, and filter cake washes with water, is then dried, grinds
Powder to get.
3. the method according to claim 2 for improving white carbon black specific surface area and Kong Rong, which is characterized in that the step
(1) in, the weight ratio of sodium silicate solid and water is 1:1, and heating temperature is 80-90 DEG C；
The concentration for being diluted with water rear sodium silicate solution is 13-18wt%.
4. the method according to claim 2 for improving white carbon black specific surface area and Kong Rong, which is characterized in that the step
(1) in, sodium benzoate in the sodium metasilicate mixed liquor, sodium sulphate concentration be respectively 20-30g/L and 30-50g/L；
The temperature of the sodium metasilicate mixed liquor is controlled at 80-90 DEG C.
5. the method according to claim 2 for improving white carbon black specific surface area and Kong Rong, which is characterized in that the step
(2) in, the concentration of sulfuric acid is 30wt%.
6. the method according to claim 2 for improving white carbon black specific surface area and Kong Rong, which is characterized in that the step
(2) in, reaction process temperature is controlled at 80-90 DEG C；
Stirring rate is 800rpm.
7. the method according to claim 2 for improving white carbon black specific surface area and Kong Rong, which is characterized in that the step
(2) in, digestion time 20-30min.
8. the method according to claim 2 for improving white carbon black specific surface area and Kong Rong, which is characterized in that the step
(3) in, drying carries out 8-10h at 170-180 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650266.9A CN108928827A (en) | 2018-06-22 | 2018-06-22 | A method of improving white carbon black specific surface area and Kong Rong |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650266.9A CN108928827A (en) | 2018-06-22 | 2018-06-22 | A method of improving white carbon black specific surface area and Kong Rong |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110150272A (en) * | 2019-06-05 | 2019-08-23 | 确成硅化学股份有限公司 | A kind of dedicated white carbon black of farm chemical carrier and preparation method thereof |
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| CN113484209A (en) * | 2021-05-24 | 2021-10-08 | 浦林成山（山东）轮胎有限公司 | Method for identifying white carbon black in vulcanized rubber and application thereof |
| CN113484209B (en) * | 2021-05-24 | 2023-08-18 | 浦林成山（山东）轮胎有限公司 | Identification method of white carbon black in vulcanized rubber and application thereof |
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