Heterogeneous catalysis for direct carbonylation of nitroaromatic compounds to isocyanates

摘要

A method for preparing an aromatic isocyanate by direct carbonylation of said nitroaromatic compounds by reacting nitroaromatic compounds with carbon monoxide in the presence of a catalyst, wherein the catalyst is in general formulaA is one or more elements selected from Ni, Ru, Rh, PD, IR, Pt and Ag;B is one or more elements selected from Sn, Sb, Pb, Zn, GA, in, GE and as.X is within the range of 0.1 toY is within the range of 0.1 toA method of containing a polymetallic material containing one or more dual intermetallic phases of one.Diagram