Process for carbonylating alcohols, employing a catalyst...

Details Process for carbonylating alcohols, employing a catalyst... Process for carbonylating alcohols, employing a catalyst...

2006-10-03

2006-10-03

Page, Thurman K. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S517000

Reexamination Certificate

active

07115774

ABSTRACT:
In a process for liquid phase carbonylation of alcohols by carbon monoxide, the carbonylation reaction is carried out in a reaction zone at a temperature of 50° C. to 150° C. 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 with general formula Q+A−, in which Q+represents a quaternary ammonium and/or a quaternary phosphonium cation, said salt having a melting point of less than 90° C.; the non-aqueous ionic liquid containing at least the major portion of the catalyst is separated; and the separated non-aqueous ionic liquid containing at least the major portion of the catalyst is returned to the reaction zone.

REFERENCES:
patent: 4366259 (1982-12-01), Knifton et al.
patent: 6211405 (2001-04-01), Cheung et al.
patent: 0338730 (1989-10-01), None
patent: 0976711 (2000-02-01), None
patent: 2029409 (1980-03-01), None

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