Simultaneous production of different isocyanates useful in polyurethane manufacture

摘要

In the simultaneous production of isocyanates (I) by reacting the corresponding amines (II) with phosgene (COCl2), reaction is carried out in a mixer and subsequent dwell reactor, then the reaction mixture is freed from excess COCl2 and hydrogen chloride (HCl) and separated into individual (I) fractions.