VERFAHREN ZUR HERSTELLUNG VON AROMATISCHEN ISOCYANATEN

摘要

Aromatic isocyanates are prepared by thermal decomposition of an aromatic hydroxamic acid halide wherein there are at least two hydroxamic acid halide groups attached to the same or different aromatic rings. The aromatic hydroxamic acid halide may be prepared by reacting nitrosyl halide with an aromatic compound containing one or more methyl or halomethyl groups attached to an aromatic ring.