HETEROGENEOUS CATALYSTS FOR THE DIRECT CARBONYLATION OF NITRO AROMATIC COMPOUNDS TO ISOCYANATES
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Apr 27, 2023
app pub date -
Nov 3, 2022
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Apr 5, 2017
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Abstract
A process for preparing an aromatic isocyanate by direct carbonylation of a nitro aromatic compound by reacting the nitro aromatic compound with carbon monoxide in the presence of a catalyst, characterized in that the catalyst contains a multi metallic material comprising one or more binary intermetallic phases of the general formula AxBy wherein:
- A is one or more element selected from Ni, Ru, Rh, Pd, Ir, Pt and Ag,B is one or more element selected from Sn, Sb, Pb, Zn, Ga, In, Ge and As,x is in the range 0.1-10,y in is in the range 0.1-10.
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