Process for preparation of mercaptobenzothiazole

Details Process for preparation of mercaptobenzothiazole Process for preparation of mercaptobenzothiazole

C - Chemistry, Metallurgy

07

D

260/309.5

C07D 277/22 (2006.01) C07D 277/72 (2006.01)

Patent

CA 1075245

IMPROVED PROCESS FOR PREPARATION OF MERCAPTOBENZOTHIAZOLE ABSTRACT OF THE DISCLOSURE In the preparation of 2-mercaptobenzothiazole by the reaction of aniline, sulfur and carbon disulfide, less than desirable yields of 2-mercaptobenzothiazole are obtained and valuable reactants are lost in a tarry by-product residue co-produced. These by-products must be removed from the mercaptobenzothiazole before the material is used commercially as an accelerator for the vulcanization of rubber. An improved process with increased yields of mercaptobenzothiazole of high purity are obtained when the tarry reaction by- product produced in said process is separated from the mercaptobenzothiazole, benzothiazole distilled therefrom and reacted with sulfur and carbon disulfide to produce mer- captobenzothiazole. - 1 -

270762

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