Patent ID: 7115774
Filing Date: 2006-10-03
Classification: B01D,B01J,C07C,Y02P

Abstract:
1. A process for carbonylating alcohols with carbon monoxide in the liquid phase, said process comprising: carrying out the carbonylation reaction in a reaction zone at a temperature of 50° C. to 150° C. and at a pressure in the range 0.5 MPa to 20 MPa in the presence of at least one catalyst comprising at least one rhodium and/or iridium complex and a halogenated promoter in at least one non-aqueous ionic liquid comprising at least one salt of the formula Q withdrawing an effluent from the reaction zone and separating from the effluent the non-aqueous ionic liquid containing in dissolved form substantially all rhodium and/or iridium values in the effluent; and recycling at least partly the resultant separated non-aqueous ionic liquid to the reaction zone.