Production method of N-cyclohexyl-2-benzothiazole sulfenamide

Abstract

The invention discloses a production method of N-cyclohexyl-2-benzothiazole sulfonamide in the technical field of preparation of N-cyclohexyl-2-benzothiazole sulfonamide. The N-cyclohexyl-2-benzothiazole sulfonamide is prepared by firstly adding 15-17% of cyclohexane in an oxidizing tank, and stirring the cyclohexane solution and adding 2-thiol group benzothiazole to form a mixed solution, wherein the amine ratio of cyclohexane and 2-thiol group benzothiazole is 2.3; secondly fully stirring the mixed solution, and then cooling to 35 DEG C, slowly dropwise adding sodium hypochlorite solution with concentration of 5% in the mixed solution, and forming reaction fluid, until the N-cyclohexyl-2-benzothiazole sulfonamide is generated, and yellow grain of 2-thiol group benzothiazole in the reaction fluid is disappeared; thirdly, stirring the oxidized reaction fluid and pouring to a suction filtration tank to filter; washing the filtered N-cyclohexyl-2-benzothiazole sulfonamide by hot water until the neutral; performing centrifugal drying and blowing by hot wind, and obtaining the finished product. Through optimizing the production process, the generation rate of the target matter is improved and waste of reactant is reduced.

Description

Technical field [0001] The invention relates to the technical field of production and preparation of N-cyclohexyl-2-benzothiazole sulfenamide, and in particular to a production method of N-cyclohexyl-2-benzothiazole sulfenamide. Background technique [0002] N-cyclohexyl-2-benzothiazole sulfenamide, trade name accelerator CZ, is one of the commonly used accelerators for vulcanized rubber. It has two major advantages: excellent scorch resistance and short vulcanization time. When used together with accelerators MBT, TMTD and MBTS, it can improve the elongation strength and tensile strength of vulcanized rubber. CZ is especially suitable for natural rubber and synthetic rubber with strong alkaline oil furnace method to reinforce carbon black, and has slight discoloration, no blooming, and excellent aging resistance of vulcanized rubber; it is widely used in the manufacture of tires, rubber shoes, rubber hoses, and tapes. , cables and other industrial products, etc. [0003] ...

AI Technical Summary

Problems solved by technology

In the first stage, there is a situation where the concentration of cyclohexylamine is too high and the ratio of cyclohexylamine to 2-mercaptobenzothiazolamine is too high, and the concentration of cyclohexylamine is too high to cause it to react with 2-mercaptobenzene The reaction speed of thiazole is too fast, and the high temperature generated by the reaction destroys the structure of 2-mercaptobenzothiazole, reduces its available amount, and finally leads to excessive cyclohexylamine remaining, while the target N-cyclohexyl-2- The generation rate of benzothiazole sulfenamide is reduced; in the second stage, the reaction temperature is too high, and the high temperature destroys N-cyclohexyl-2-benzothiazole sulfenamide, which affects its generation rate

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