Patent ID: 6750362
Filing Date: 2004-06-15
Classification: B01J,C07C,Y02P

Abstract:
A process for making 5FVN, comprising contacting in a reactor 3PN with CO and hydrogen in the presence of a catalyst comprising rhodium and a bidentate phosphite ligand to produce a product stream comprising 5FVN, unreacted 3PN and catalyst, separating at least a portion of said product stream into a low boiler fraction comprising 3PN and a major portion of the 5FVN and a high boiler fraction comprising a minor portion of the 5FVN and catalyst, contacting at least a portion of said high boiler fraction with hydrogen at a temperature in the range 50 degrees C. to 170 degrees C. and a pressure in the range 50 psig to 2000 psig to produce a hydrogen-treated high boiler fraction, and introducing at least a portion of said hydrogen-treated high boiler fraction into the reactor.