Dewatering method in production process of vulcanization promoter CZ

A rubber vulcanization and production process technology, applied in the field of rubber vulcanization accelerator CZ production, can solve the problems of affecting production efficiency, large energy consumption, and large amount of washing water, so as to reduce the amount of washing water, increase the filtration rate, and reduce the oil phase The effect of content

Inactive Publication Date: 2013-02-13
TIANJIN UNIV +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the crude M is rich in impurities, in the process of generating the accelerator CZ, a large amount of oily resin by-products are produced and wrapped on the surface of the solid particles, which seriously hinders the filtration rate. In addition, the rubber accelerator CZ is filtered after a dehydration. The moisture content of the cake is very high, about 43%, resulting in a large amount of subsequent washing water and energy consumption, which seriously affects the production efficiency

Method used

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  • Dewatering method in production process of vulcanization promoter CZ
  • Dewatering method in production process of vulcanization promoter CZ

Examples

Experimental program
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Effect test

Embodiment 1

[0014] like figure 2 In the technical route shown, non-ionic surfactant sorbitan monooleate (span80) is added to the CZ suspension containing rubber vulcanization accelerator, and the addition amount is 0.75% of the solid phase mass in the CZ suspension. Stir evenly to fully mix the accelerator CZ suspension with the surfactant, and then use vacuum filtration to dehydrate once. The water content of the accelerator CZ filter cake is relatively lower than that of the CZ suspension without surfactant. 11.36% (wt).

Embodiment 2

[0016] like figure 2 In the technical route shown, the non-ionic surfactant span80 is added to the rubber vulcanization accelerator CZ suspension, and the addition amount is 0.5% of the solid phase mass in the CZ suspension. Stir evenly to fully mix the accelerator CZ suspension with the surfactant, and then use vacuum filtration to dehydrate once. The water content of the accelerator CZ filter cake is relatively lower than that of the CZ suspension without surfactant. 8.3% (wt).

Embodiment 3

[0018] like figure 2 In the technical route shown, the non-ionic surfactant span80 is added to the rubber vulcanization accelerator CZ suspension, and the addition amount is 0.25% of the solid phase mass in the CZ suspension. Stir evenly to fully mix the accelerator CZ suspension with the surfactant, and then dehydrate once by vacuum filtration. The water content of the accelerator CZ filter cake is relative to the water content of the filter cake when the CZ suspension without surfactant is filtered. decreased by 7.86% (wt).

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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 [0001] The invention relates to the technical field of production of rubber vulcanization accelerator CZ, in particular to a dehydration method in the production process of rubber vulcanization accelerator CZ. Background technique [0002] Rubber vulcanization accelerator CZ, scientific name N-cyclohexyl-2-benzothiazole sulfenamide. It is a post-effect rubber vulcanization accelerator, which has the characteristics of long scorch time and fast vulcanization speed, and is widely used in various rubber processing industries. When the vulcanization temperature is above 138°C, the accelerating effect is very strong, and it is often used as the second accelerator in combination with accelerator TMTD, accelerator D or other basic accelerators. The synthesis method of CZ is industrially mostly adopted four methods of sodium hypochlorite oxidation method, hydrogen peroxide oxidation method, non-oxidant synthesis method, and oxygen oxidation method. At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/80
Inventor 谭蔚马新龙刘丽艳苏艳霞王树华安静李松
Owner TIANJIN UNIV
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