Process for the preparation of aliphatic isocyanates.

摘要

A multi-step process for the preparation of an aliphatic mono-, di- or poly- isocyanate from primary aliphatic amines and isocyanic acid to form an aliphatic urea which is then reacted with a dialkyl amine to give a mono-, di- or poly- (dialkyl) urea which is then thermally treated in the presence of a reaction promoter to produce the desired isocyanate.