CN102924401A - Dewatering method in production process of vulcanization promoter CZ - Google Patents
Dewatering method in production process of vulcanization promoter CZ Download PDFInfo
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- CN102924401A CN102924401A CN2012104427153A CN201210442715A CN102924401A CN 102924401 A CN102924401 A CN 102924401A CN 2012104427153 A CN2012104427153 A CN 2012104427153A CN 201210442715 A CN201210442715 A CN 201210442715A CN 102924401 A CN102924401 A CN 102924401A
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Abstract
The invention relates to a dewatering method in the production process of vulcanization promoter CZ. Raw materials adopts rough mitochondria (M) which is rich in oil phase, and filtering rate is reduced, so in the first dewatering to vulcanization promoter CZ, nonionic surfactant or anionic surfactant is added in suspension liquid containing the vulcanization promoter CZ. After sufficient mixing, liquid phase in the suspension liquid is removed through vacuum filtering and dewatering. The dewatering method has the advantages that through adoption of new process, after the vulcanization promoter CZ being subjected to the first dewatering, water content of filter cakes is reduced by 10% or so compared with an original process so that the content of the oil phase in the filter cakes can be greatly reduced, and filtering rate is accelerated and subsequent washing water dosage is substantially reduced.
Description
Technical field
The present invention relates to a kind of rubber vulcanization accelerant CZ production technical field, particularly relate to the dewatering in a kind of rubber vulcanization accelerant CZ production process.
Background technology
Rubber vulcanization accelerant CZ, formal name used at school N-cyclohexyl-2-[4-morpholinodithio sulphenamide.Be a kind of aftereffect thiofide, have the characteristics such as time of scorch is long, vulcanization rate is fast, be widely used in all kinds of Rubber processing industry.Promoter action is very strong when 138 ° of C of curing temperature are above, and normal the cooperation with Vulcanization accelerator TMTD, vulkacit D or other basic-type accelerators done the second promotor.The industrial most employing sodium hypochlorite oxidization of the synthetic method of CZ, hydrogen peroxide oxidation method, non-oxidation agent synthesis method, these four kinds of methods of dioxygen oxidation method.Present domestic main employing sodium hypochlorite oxidization.The technological process of production of sodium hypochlorite oxidization production rubber vulcanization accelerant CZ as shown in Figure 1.Thick M, hexahydroaniline are added reactor, fully drip hypochlorite oxidation after the reaction and generate CZ suspension, through primary dewatering and second dehydration, drying makes the accelerator CZ finished product.Mother liquor is through the Distillation recovery hexahydroaniline, and the hexahydroaniline of recovery is re-used as raw material and reacts.
2 Mercaptobenzothiazole (MBT) is to be made with extra care by sulphur, dithiocarbonic anhydride and aniline synthetic thick M under condition of high voltage to form as the main raw material of CZ.In the industrial production, because unfavorable factors such as thick M refining step is many, energy consumption large, a large amount of waste water of generation, in order to save cost, a lot of manufacturers are the direct synthetic rubber accelerant CZ of raw material with thick M at present.Owing to being rich in impurity among the thick M, in the process of promoter for generation CZ, cause the generation of a large amount of Gugulipid by products, and be wrapped in solid particles surface, seriously hindered filtering rate, in addition, rubber accelerator CZ filter cake water capacity after primary dewatering is very high, is about about 43%, causes follow-up wash water consumption large, power consumption is large, has had a strong impact on production efficiency.Therefore study the technology of rubber accelerator CZ high efficiency filter, to enhancing productivity, improving the quality of products has important meaning with economic benefit.
Summary of the invention
Technical problem to be solved by this invention be in a kind of rubber vulcanization accelerant CZ production process that proposes for existing background technology accelerated filtration speed and significantly the dehydration method, it to the effect that for this part of primary dewatering in the whole rubber vulcanization accelerant CZ Production Flow Chart, can effectively increase filtering rate, and the water content of accelerant CZ filter cake is declined to a great extent.
The present invention solves the problems of the technologies described above the technical scheme that adopts:
Be at rubber vulcanization accelerant CZ when carrying out primary dewatering, in the suspension that contains rubber vulcanization accelerant CZ, add tensio-active agent, stir make CZ suspension and tensio-active agent fully mix after, carry out vacuum filtration dehydration.
Described glass or plastic containers or anion surfactant.Nonionogenic tenside is selected sorbitol monooleate (span80); Anion surfactant is selected sodium lauryl sulphate and sodium laurylsulfonate.
The addition of nonionic watch active agent span80 and anionic and sodium laurylsulfonate be in the CZ suspension solid phase quality 0.25% ~ 0.75%.
Compared with prior art, the invention has the advantages that: the water content of filter cake reduces about 10% with respect to former technique after the rear rubber vulcanization accelerant CZ suspension primary dewatering of adopting new technology, greatly reduce the content of oil phase in the filter cake, effectively increase filtering rate, reduced follow-up wash water consumption.
Description of drawings
Fig. 1: the existing technological process of production of producing rubber vulcanization accelerant CZ.
Fig. 2: schematic flow sheet of the present invention.
Embodiment
The invention will be further described below in conjunction with example, but should be noted that these several embodiment only are used for system and method for the present invention is described, and scope of the present invention can not be confined to this.
Embodiment 1:
Technological line as shown in Figure 2 adds nonionogenic tenside sorbitol monooleate (span80) to containing in the rubber vulcanization accelerant CZ suspension, addition be in the CZ suspension solid phase quality 0.75%.Stir make accelerant CZ suspension and tensio-active agent fully mix after, adopt the vacuum filtration method to carry out primary dewatering, cake moisture 11.36% (wt) that the descended when water content of accelerant CZ filter cake does not add the CZ suspension filtered of tensio-active agent relatively.
Embodiment 2:
Technological line as shown in Figure 2 adds nonionogenic tenside span80 to rubber vulcanization accelerant CZ suspension, addition be in the CZ suspension solid phase quality 0.5%.Stir make accelerant CZ suspension and tensio-active agent fully mix after, adopt the vacuum filtration method to carry out primary dewatering, cake moisture 8.3% (wt) that the descended when water content of accelerant CZ filter cake does not add the CZ suspension filtered of tensio-active agent relatively.
Embodiment 3:
Technological line as shown in Figure 2 adds nonionogenic tenside span80 to rubber vulcanization accelerant CZ suspension, addition be in the CZ suspension solid phase quality 0.25%.Stir make accelerant CZ suspension and tensio-active agent fully mix after, adopt the method for vacuum filtration to carry out primary dewatering, cake moisture 7.86% (wt) that the descended when water content of accelerant CZ filter cake does not add the CZ suspension filtered of tensio-active agent relatively.
Embodiment 4:
Technological line as shown in Figure 2 adds anionic to rubber vulcanization accelerant CZ suspension, addition be in the CZ suspension solid phase quality 0.75%.Stir make accelerant CZ suspension and tensio-active agent fully mix after, adopt the method for vacuum filtration to carry out primary dewatering, cake moisture 6.58% (wt) that the descended when water content of accelerant CZ filter cake does not add the CZ suspension filtered of tensio-active agent relatively.
Embodiment 5:
Technological line as shown in Figure 2 adds the anion surfactant sodium laurylsulfonate to rubber vulcanization accelerant CZ suspension, addition be in the CZ suspension solid phase quality 0.75%.Stir make accelerant CZ suspension and tensio-active agent fully mix after, adopt the method for vacuum filtration to carry out primary dewatering, cake moisture 8.66% (wt) that the descended when water content of accelerant CZ filter cake does not add the CZ suspension filtered of tensio-active agent relatively.
Dewatering in the rubber vulcanization accelerant CZ production process of the present invention can also make other changes in different forms on the basis of the above description for those of ordinary skill in the field.Here need not also can't give all embodiments exhaustive.So similar replacement and change apparent to those skilled in the artly, they are deemed to be included in spirit of the present invention, scope and the content.
Claims (4)
1. the dewatering in the rubber vulcanization accelerant CZ production process, it is characterized in that when rubber vulcanization accelerant CZ carries out primary dewatering, in the suspension that contains rubber vulcanization accelerant CZ, add tensio-active agent, stir make CZ suspension and tensio-active agent fully mix after, through the vacuum filtration dehydration, remove water and oil phase in the filter cake.
2. the dewatering in a kind of rubber vulcanization accelerant CZ production process as claimed in claim 1 is characterized in that described glass or plastic containers or anion surfactant.
3. the dewatering in a kind of rubber vulcanization accelerant CZ production process as claimed in claim 2 is characterized in that described nonionogenic tenside selects sorbitol monooleate; Anion surfactant is selected sodium lauryl sulphate and sodium laurylsulfonate.
4. the dewatering in a kind of rubber vulcanization accelerant CZ production process as claimed in claim 1, it is characterized in that described tensio-active agent addition be in the CZ suspension solid phase quality 0.25% ~ 0.75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104427153A CN102924401A (en) | 2012-11-06 | 2012-11-06 | Dewatering method in production process of vulcanization promoter CZ |
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| CN2012104427153A CN102924401A (en) | 2012-11-06 | 2012-11-06 | Dewatering method in production process of vulcanization promoter CZ |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539756A (en) * | 2013-10-16 | 2014-01-29 | 科迈化工股份有限公司 | Method for dehydrating in process of producing rubber vulcanizing accelerant MBTS (2-mercaptobenzothiazole disulfide) by using hydrogen peroxide method |
| CN108059626A (en) * | 2017-12-21 | 2018-05-22 | 科迈化工股份有限公司 | Improve the method for vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamide caking |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307037A (en) * | 2008-06-13 | 2008-11-19 | 天津大学 | Dewatering process in production process of rubber vulcanization accelerator M |
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2012
- 2012-11-06 CN CN2012104427153A patent/CN102924401A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307037A (en) * | 2008-06-13 | 2008-11-19 | 天津大学 | Dewatering process in production process of rubber vulcanization accelerator M |
Non-Patent Citations (1)
| Title |
|---|
| 谭蔚、卓永、杨小刚等: "表面活性剂对橡胶促进剂M脱水效果的影响", 《化学工业与工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539756A (en) * | 2013-10-16 | 2014-01-29 | 科迈化工股份有限公司 | Method for dehydrating in process of producing rubber vulcanizing accelerant MBTS (2-mercaptobenzothiazole disulfide) by using hydrogen peroxide method |
| CN108059626A (en) * | 2017-12-21 | 2018-05-22 | 科迈化工股份有限公司 | Improve the method for vulcanization accelerator N cyclohexyl 2 benzothiazole sulfenamide caking |
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Application publication date: 20130213 |