Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid anhydrides
Patent
1994-02-10
1994-11-01
Killos, Paul J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid anhydrides
562890, C07C 5112, C07C 5312
Patent
active
053609298
ABSTRACT:
A process for the production of a carboxylic acid anhydride comprises contacting a reaction composition comprising a carboxylic acid ester, a hydrocarbyl halide and/or a hydrocarbyl ether reactant and a hydrocarbyl halide promoter with carbon monoxide in the presence of a catalyst comprising an insoluble polymer support having pendant quaternised N-base or alkylated N-oxide pyridine groups supporting a rhodium species in which process the rhodium species is prevented from leaching from the polymer support by maintaining throughout the process a finite concentration of carboxylic acid anhydride in the reaction composition.
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Sunley John G.
Watson Derrick J.
Watt Robert J.
Williams Bruce L.
BP Chemicals Limited
Killos Paul J.
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