Process for preparing a diester of oxalic acid
AssigneeUnion Carbide Corporation
InventorsBernard C. Ream, Joseph P. Henry, Louis A. Kapicak
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Abstract
A process is disclosed for preparing a diester of oxalic acid by contacting carbon monoxide and an ester of nitrous acid in the vapor state under a pressure in the presence of a supported palladium monolith catalyst.
Claims15
The vapor phase heterogeneous process for preparing a diester of oxalic acid which comprises contacting a vaporous ester of nitrous acid with carbon monoxide in the vapor state, in the presence of a solid supported palladium monolith catalyst comprising metallic palladium or a salt thereof deposited on a monolithic carrier at a temperature of between about 50.degree. C. and about 200.degree. C., and recovering a diester of oxalic acid, in which the ester group corresponds to the alcohol used in making the ester of nitrous acid.
Dependencies are inferred from the claim text.