PROCESS FOR THE PREPARATION OF P-TOLUENESULFOCHLORIDE

摘要

Improved process for the preparation of p-toluenesulfochloride, wherein for each mol of toluene about 1 - 2 mols of chlorosulfonic acid and about 0.1 - 1 mol of an alkali metal-, alkaline-earth metal- or ammonium salt are placed in a reaction vessel, Toluene is added thereto and after reacting at 60 DEG - 90 DEG C the mixture is cooled to about 30 DEG - 40 DEG C, a further amount of chlorosulfonic acid (at least 1 mol per each mol of toluene) is added and the reaction mixture is treated to form p-toluenesulfochloride. In comparison with known processes the instant process has the great advantage that the p-toluenesulfochloride is obtained in a much higher yield.