CN112679994A - Method for adjusting pH value of carbon black for rubber - Google Patents
Method for adjusting pH value of carbon black for rubber Download PDFInfo
- Publication number
- CN112679994A CN112679994A CN202011358858.7A CN202011358858A CN112679994A CN 112679994 A CN112679994 A CN 112679994A CN 202011358858 A CN202011358858 A CN 202011358858A CN 112679994 A CN112679994 A CN 112679994A
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- CN
- China
- Prior art keywords
- carbon black
- rubber
- value
- magnesium sulfate
- ammonium sulfate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000006229 carbon black Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 17
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 40
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 22
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 20
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 20
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000005469 granulation Methods 0.000 claims abstract description 8
- 230000003179 granulation Effects 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000005550 wet granulation Methods 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 239000011230 binding agent Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 13
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical class C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Landscapes
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention provides a method for adjusting the pH value of carbon black for rubber, which comprises the following steps: in the wet granulation process of the carbon black, firstly, ammonium sulfate or magnesium sulfate is added into a granulation adhesive solution, and the mixture is stirred and fully dissolved to obtain a regulating solution; then the regulating solution is injected into granulating water, and the granulating water is added into the powdered carbon black for granulation and drying. The preparation method is simple, the reaction conditions are mild, the pH value of the carbon black for rubber can be accurately adjusted by utilizing the ammonium sulfate or the magnesium sulfate, the pH value of the carbon black can be controlled in a relatively narrow range, and various requirements of different customers are met; avoids using strong acid or alkali, avoids corroding reaction equipment or increasing reaction ash content to influence product quality.
Description
Technical Field
The invention belongs to the technical field of carbon black generation, and particularly relates to a method for adjusting the pH value of carbon black for rubber.
Background
The pH of carbon black is a parameter that expresses the acidity or basicity of the carbon black surface. The pH of carbon black is mainly affected by the acidity or basicity of the surface chemical groups of the carbon black, the nature of the binder, the quality of the process water, and the like. The pH value of the carbon black for rubber is generally required to be 6-10, and the range required by part of customers is narrow, so that certain difficulty is brought to production control. Experiments prove that the effect of regulating the pH value of the carbon black by adopting the traditional acid or alkali is not good, the acid corrodes more equipment, the addition of a large amount of alkali causes the increase of ash content of a product, and in addition, the carbon black production line uses more secondary water, wherein more impurities exist, and hard scale is easily formed under the strong alkali condition, so that the blockage of pipelines or the damage of equipment are caused.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a method which is simple and mild in condition and can accurately adjust the pH value of rubber carbon black.
The technical scheme adopted by the invention is as follows: a method for adjusting the pH value of carbon black for rubber adopts ammonium sulfate or magnesium sulfate as a regulator of the pH value of the carbon black.
Preferably, ammonium sulfate is added to the binder solution when the carbon black has a higher pH and requires downward adjustment, and magnesium sulfate is added to the binder solution when the carbon black has a lower pH and requires upward adjustment.
Preferably, the mass ratio of the ammonium sulfate to the carbon black is (0.5-3): 1000.
preferably, the mass ratio of the magnesium sulfate to the carbon black is (0.5-3): (10000-500000).
Preferably, the method comprises the following steps: in the wet granulation process of the carbon black, firstly, ammonium sulfate or magnesium sulfate is added into a binder solution for granulation, and the mixture is stirred and fully dissolved to obtain a regulating solution; then the regulating solution is injected into granulating water, and the granulating water is added into the powdered carbon black for granulation and drying.
Preferably, the mass ratio of the ammonium sulfate to the carbon black is 1: 1000.
preferably, the mass ratio of the magnesium sulfate to the carbon black is 1: (10000-500000).
The beneficial effects obtained by the invention are as follows: the preparation method is simple, the reaction condition is mild, the pH value of the carbon black for rubber can be accurately adjusted by utilizing ammonium sulfate or magnesium sulfate, the pH value of the carbon black can be controlled in a relatively narrow range, and various requirements of different customers are met; avoids using strong acid or alkali, avoids corroding reaction equipment or increasing reaction ash content to influence product quality.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
A method for adjusting the pH value of carbon black for rubber comprises the following steps: in the wet granulation process of the carbon black, firstly, ammonium sulfate or magnesium sulfate is added into a granulation adhesive solution, and the mixture is stirred and fully dissolved to obtain a regulating solution; then the regulating solution is injected into granulating water, and the granulating water is added into the powdered carbon black for granulation and drying. Ammonium sulfate is added to the binder solution when the pH of the carbon black is high and needs to be adjusted downward, and magnesium sulfate is added to the binder solution when the pH of the carbon black is low and needs to be adjusted upward. The mass ratio of the ammonium sulfate to the carbon black is (0.5-3): 1000. the magnesium sulfate and the carbon black are mixed according to the mass ratio of (0.5-3): (10000-500000).
The reaction principle of the invention is as follows: ammonia or ammonium salts may reduce the pH of the product to some extent. The reason for this is that oxidation of the surface of carbon black generates a certain amount of formaldehyde, and formaldehyde reacts with ammonium species to generate acid. The ammonium radical or free ammonia reacts with formaldehyde to generate hexamethylenetetramine salt and strong acid. This is a basic chemical reaction widely used to test the ammonia nitrogen content in water.
NH3·H2O＝NH4 ++OH-
6HCHO+4NH4 +＝(CH2)6N4H++6H2O+3H+
The effect of ammonium sulfate on the pH of carbon black varies from product to product. The effect is particularly pronounced for some products. We analyzed that the surface oxidation of such products produced more formaldehyde and therefore reacted more readily with ammonium sulfate, resulting in a more pronounced pH drop.
Example 1, N326 carbon black having a pH of 9.6 was reduced to about 8.5 using ammonium sulfate; the pH of the N134 or N234 carbon black of 7.2 can be reduced to about 6.0.
The effect of magnesium sulfate on the pH of the carbon black is less pronounced than ammonium sulfate. But repeated experiments prove that the medicine has a certain regulation effect. The analytical principle is that magnesium sulfate has the function of absorbing free ammonia. Acidification of the carbon black surface by ammonia or ammonium species can be avoided or reduced.
5MgSO4+10NH4HCO3＝4MgCO3·Mg(OH)2·4H2O↓ +6CO2↑+5(NH4)2SO4
MgSO4+NH3·H2O＝(NH4)2SO4+Mg(OH)2↓
Example 2N 660 carbon black having a pH of 6.5 was adjusted to about 7.0 using magnesium sulfate; or the pH of the N660 carbon black is adjusted to about 6.8, wherein the pH is about 6.3. Or the product with the pH value of about 7.0 is lifted to about 7.5. It is expected that the effect on the hard carbon black, which is more significantly affected by ammonia, will be more significant.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (7)
1. A method for adjusting the pH value of carbon black for rubber is characterized by comprising the following steps: ammonium sulfate or magnesium sulfate is used as a regulator of the pH value of the carbon black.
2. The method of claim 1, wherein the pH of the carbon black is adjusted by the following steps: ammonium sulfate is added to the binder solution when the pH of the carbon black is high and needs to be adjusted downward, and magnesium sulfate is added to the binder solution when the pH of the carbon black is low and needs to be adjusted upward.
3. The method of claim 2, wherein the pH of the carbon black for rubber is adjusted by: the mass ratio of the ammonium sulfate to the carbon black is (0.5-3): 1000.
4. the method of claim 2, wherein the pH of the carbon black for rubber is adjusted by: the magnesium sulfate and the carbon black are mixed according to the mass ratio of (0.5-3): (10000-500000).
5. The method of claim 1, wherein the pH of the carbon black is adjusted by the following steps: the method comprises the following steps: in the wet granulation process of the carbon black, firstly, ammonium sulfate or magnesium sulfate is added into a granulation adhesive solution, and the mixture is stirred and fully dissolved to obtain a regulating solution; then the regulating solution is injected into granulating water, and the granulating water is added into the powdered carbon black for granulation and drying.
6. The method of claim 3, wherein the pH of the carbon black for rubber is adjusted by: the mass ratio of the ammonium sulfate to the carbon black is 1: 1000.
7. the method of claim 4, wherein the pH of the carbon black for rubber is adjusted by: the mass ratio of the magnesium sulfate to the carbon black is 1: (10000-500000).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011358858.7A CN112679994B (en) | 2020-11-27 | 2020-11-27 | Method for adjusting pH value of carbon black for rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011358858.7A CN112679994B (en) | 2020-11-27 | 2020-11-27 | Method for adjusting pH value of carbon black for rubber |
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| Publication Number | Publication Date |
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| CN112679994A true CN112679994A (en) | 2021-04-20 |
| CN112679994B CN112679994B (en) | 2022-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956688A (en) * | 2021-11-24 | 2022-01-21 | 茂名环星新材料股份有限公司 | Carbon black and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB517274A (en) * | 1937-06-17 | 1940-01-25 | Columbian Carbon | Improvements in and relating to the treatment of carbon black and lamp black |
| NL73596C (en) * | 1948-12-28 | 1953-11-16 | Phillips Petroleum Co. | PROCESS FOR INCREASING THE ACIDITY OF OVEN BLACK |
| CN102002265A (en) * | 2010-11-01 | 2011-04-06 | 朝阳黑猫伍兴岐炭黑有限责任公司 | Method for regulating PH value of carbon black |
| CN206447808U (en) * | 2017-01-23 | 2017-08-29 | 喀什德力克石油工程技术有限公司 | A kind of PH value of carbon black regulating system, pelletizing of carbon black system and carbon black production system |
| CN110862701A (en) * | 2019-10-18 | 2020-03-06 | 嘉峪关大友嘉能化工有限公司 | Device and method for adjusting pH value of carbon black |
| CN211570515U (en) * | 2019-10-18 | 2020-09-25 | 嘉峪关大友嘉能化工有限公司 | Adjusting device for pH value of carbon black |
-
2020
- 2020-11-27 CN CN202011358858.7A patent/CN112679994B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB517274A (en) * | 1937-06-17 | 1940-01-25 | Columbian Carbon | Improvements in and relating to the treatment of carbon black and lamp black |
| NL73596C (en) * | 1948-12-28 | 1953-11-16 | Phillips Petroleum Co. | PROCESS FOR INCREASING THE ACIDITY OF OVEN BLACK |
| CN102002265A (en) * | 2010-11-01 | 2011-04-06 | 朝阳黑猫伍兴岐炭黑有限责任公司 | Method for regulating PH value of carbon black |
| CN206447808U (en) * | 2017-01-23 | 2017-08-29 | 喀什德力克石油工程技术有限公司 | A kind of PH value of carbon black regulating system, pelletizing of carbon black system and carbon black production system |
| CN110862701A (en) * | 2019-10-18 | 2020-03-06 | 嘉峪关大友嘉能化工有限公司 | Device and method for adjusting pH value of carbon black |
| CN211570515U (en) * | 2019-10-18 | 2020-09-25 | 嘉峪关大友嘉能化工有限公司 | Adjusting device for pH value of carbon black |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956688A (en) * | 2021-11-24 | 2022-01-21 | 茂名环星新材料股份有限公司 | Carbon black and preparation method and application thereof |
| CN113956688B (en) * | 2021-11-24 | 2022-09-27 | 茂名环星新材料股份有限公司 | Carbon black and preparation method and application thereof |
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| CN112679994B (en) | 2022-02-18 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A method for adjusting the pH value of carbon black used in rubber Effective date of registration: 20231024 Granted publication date: 20220218 Pledgee: China Construction Bank Corporation Shahe Branch Pledgor: LONGXING CHEMICAL STOCK Co.,Ltd. Registration number: Y2023980057352 |
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