PROCESS FOR PREPARATION OF DISODIUM STILBENEDISULFONATES

摘要

The present invention relates to a process for preparing sodium benzenesulf onate, more specifically, to a process for preparing sodium benzenesulfonate, which comprises the steps of a) reacting 2-X-4, 6-dichloro-l, 3, 5-triazine with a benzenesulf onic acid, 2, 2- (1, 2-ethenediyl) bis [5-amino] - disodium salt to produce a mixture; b) adding cyanuric chloride to the mixture from a); c) adding the compound, XH to the mixture from b) to produce a benzenesulf onic acid, 2,2'- (1, 2-ethenediyl) bis [5- (4-X-ß-chloro-l, 3, 5-triazine-2- yl) amino] disodium salt; and d) separating and purifying the product to obtain the final benzenesulf onic acid, 2, 2'- (1,2- ethenediyl) bis [5- (4-X-ß-chloro-l, 3, 5-triazin-2-yl) amino] - disodium salt [wherein, X represents an organic substituent].