Process for the manufacture of aromatic isocyanates
AssigneeProduits Chimiques Ugine Kuhlmann
InventorsJacques Kervennal, Jean-Marie Cognion, Pierre Braunstein
Life of this patent
Estimating the term…
Abstract
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 V.sub.B, VI.sub.B, and VIII of the Periodic Table; the precursor of the active phase being a heteropolymetallic complex and, more particularly, a mixed bimetallic cluster.
Claims7
In the process for the manufacture of aromatic isocyanates by carbonylation of nitro derivatives, the improvement comprising carrying out the reaction in the presence of a supported catalyst comprising as the active phase particles or an oxide of a precious metal of Group VIII and of a metal selected from Group V.sub.B, VI.sub.B, or VIII of the Periodic Table;
- and precursor of the active phase being a heteropolymetallic cluster.
Dependencies are inferred from the claim text.