Societe Nationale Des Poudres Et Explosifs

Jacques Sala

Denis Souyri

Julien C Deweerdt

According to the invention, phosgene is reacted with a mercaptan in the presence of a catalyst of the general formula: ##STR1## in which X=O or S and in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are, in particular, aliphatic, cycloaliphatic or aromatic groups or a hydrogen atom. The proportion of catalyst is 0.1 to 10 mol %, relative to the mercaptan, and the reaction is carried out at ambient temperature and at atmospheric pressure. The process, which can be made continuous, results in short residence times and in a high yield and a high purity. Thiochloroformates are applied essentially as intermediates for the synthesis of herbicidal compounds.

Growing community of inventors

Portet sur Garonne, France

Jacques Sala