ENVIRONMENT-FRIENDLY SYNTHESIS METHOD FOR DIBENZOTHIAZOLE DISULFIDE AS RUBBER VULCANIZATION ACCELERATOR

摘要

The present invention discloses an environment-friendly synthesis method for dibenzothiazole disulfide as rubber vulcanization accelerator, belonging to the technical field of chemical engineering. The method specifically is: completely dissolving 2-mercaptobenzothiazole in the sodium carbonate aqueous solution, then dropwise adding hydrogen peroxide, introducing carbon dioxide to adjust the pH of the system, and carrying out oxidation to generate dibenzothiazole disulfide and sodium bicarbonate. The sodium carbonate solution formed by heating the obtained sodium bicarbonate solution can be used for dissolving the raw material 2-mercaptobenzothiazole so as to realize circulation of the raw materials. The purity of the product prepared by the method in the present invention can reach 99% or more, compared with the traditional mixed acid oxidation method, a large amount of salt-containing wastewater is reduced, and the process is environmentally friendly.