Production of isocyanates by reaction of amines and phosgene comprises use of the isocyanate as a solvent in a reactor column with at least partial recycle

摘要

A process for the production of isocyanates by reaction of amines and phosgene comprises use of the isocyanate as a solvent. The reaction is performed in a reactor column whereby the condensed phase in the sump of the reactor column is at least partially recycled to the concentrating part of the column.