Process for purification of crude 2-mercaptobenzothiazole

摘要

Crude 2-mercaptobenzothiazole is purified by preparing a crude, liquid 2-mercaptobenzothiazole by reacting aniline, carbon disulfide and sulfur under elevated pressure at high temperatures; extracting said crude, liquid 2-mercaptobenzothiazole in the molten state with cold carbon disulfide by liquid-liquid extraction thereby forming a slurry of 2-mercaptobenzothiazole crystals; and filtering and drying said crystals.