Process for preparing aromatic isocyanates by carbonylation of nitro compounds in the presence of supported catalysts prepared from heteropolymetallic complexes

摘要

A process for the manufacture of aromatic isocyanates by carbonylation of nitro derivatives comprising carrying out the reaction in the presence of supported catalysts containing as the active phase particles or an oxide of a precious metal of Group VIII and of a metal selected from Group VB, VIB, and VIII of the Periodic Table; the precursor of the active phase being a heteropolymetallic complex and, more particularly, a mixed bimetallic cluster.