The Development Of A New Synthesis Technology Of Latex Sulfuration Accelerant (CBS)

N-Cyclohexyl-2-benzothiazole sulphenamide (abbreviate as CRS or CZ), is used as latex sulfuration accelerant with aftereffect. It has following characteristics including good anti-scorch, high speed of sulfuration, light color change and non-spray frost in the process of sulfuration. Furthermore, the extend strength and tensile strength are both improved during sulfuration. The application mainly refers to the production of tyres, rubber shoes, hoses, adhesive tapes and cables.In the past, the accelerant CBS were produced by the oxidant of sodium hypochlorite and yield 2000t per year. This technology has some problems like high cost and environment pollution. Carrying out the survey of technology and market, we find the pros and cons of the synthesis technology line of CBS with sodium hypochlorite, oxygen and oxydol as oxidant. Based on these, we developed a new technology with accelerant M and cyclohexane as crucial materials. After the systematic test, we built equipment with yielding 200t/y and studied deeply. According to the effect of feed composition, reaction temperature and reaction time on products quality and yield, the optimal technology condition have been chosen.In this work, the production ability of single reactor was improved by using low ratio of feed. The recycle use of original liquid reduces the cost and the drain of sewage. Compared with conventional technology of sodium hypochlorite oxidation, our new technology is safer and friendly to environment because of the non-use of chlorine. In addition, the product by new technology is better than that by original technology in application. The successful development of this technology gives foundation to reconstruct old equipment.