Abstract: The process of converting FS smoke agent (a mixture of sulfur trioxide and hlorosulfonic acid) to sulfamic acid and ammonium chloride comprising the steps of dissolving the FS smoke agent in an organic solvent solution to obtain a solvation product, subjecting the solvation product to ammonia gas to obtain a sulfamic acid ammonium chloride mix, and separating and purifying the mix into sulfamic acid and ammonium chloride.

Abstract: Tear gas or CS (o-Chlorobenzalmalononitrile) has two nitrile functional gps which, when removed, effects the chemical conversion of bulk CS to o-chlorostyrene. This involves a first step, an acid or base catalyzed hydrolysis of CS to o-chlorocinnamic acid. Thereafter a second reaction is the decarboxylation of the intermediate product to give o-chlorostyrene.CS is reacted with 70% sulfuric acid at 120.degree. C., producing ammonium sulfate and orth-ochlorocinnamic acid (the intermediate product). This intermediate product is separated and thermally decarboxylated at 270.degree. C. (with a catalytic amount of soda lime and copper powder) to ortho-chlorostyrene.