VERFAHREN ZUR HERSTELLUNG VON ARYLISOCYANATEN DURCH THERMISCHE SPALTUNG VON ARYLURETHANEN

摘要

A process for making aryl isocyanates comprises thermally decomposing aryl urethanes at a temperature between 175 DEG C. and 600 DEG C. in the presence of a catalyst, present in the heterogeneous phase, said catalyst being a metal selected from the group consisting of zinc, aluminum, titanium, iron, chromium, cobalt and nickel.