Preparation of adipic acid by hydrocarboxylation of pentenoic acids
AssigneeRhone-Poulenc Chimie
InventorsPhilippe Denis, Francois Metz, Robert Perron
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Abstract
Adipic acid is selectively prepared via hydrocarboxylation of pentenoic acids, by reacting water and carbon monoxide with at least one pentenoic acid, in the presence of a catalytically effective amount of a rhodium-based catalyst and at least one iodinated promoter therefor, at a temperature ranging from 100.degree. to 240.degree. C. and a pressure greater than atmospheric, and wherein (a) such reaction is carried out in the absence of a third reaction solvent and (b) the carbon monoxide partial pressure, measured at 25.degree. C., is less than or equal to 20 bar.
Claims8
A process for the preparation of adipic acid, comprising reacting water and carbon monoxide with at least one pentenoic acid, in the presence of a catalytically effective amount of a rhodium-based catalyst and at least one iodinated promoter therefor, at a temperature ranging from 100.degree. to 240.degree. C. and at a pressure greater than atmospheric, with the proviso that (a) said reaction is carried out in the absence of a third reaction solvent and (b) the carbon monoxide partial pressure, measured at 25.degree. C., is less than or equal to 20 bar.
Dependencies are inferred from the claim text.