Carrier-supported catalyst and process for making...

Details Carrier-supported catalyst and process for making... Carrier-supported catalyst and process for making...

C - Chemistry, Metallurgy

07

C

252/84, 260/536.

C07C 51/54 (2006.01) B01J 31/18 (2006.01) B01J 31/26 (2006.01) C07C 51/56 (2006.01)

Patent

CA 1267129

CARRIER-SUPPORTED CATALYST AND PROCESS FOR MAKING MONO- CARBOXYLIC ANHYDRIDES ABSTRACT OF THE DISCLOSURE Monocarboxylic anhydrides of the general formula (RCO)2O are made by reacting a carboxylic acid ester or dialkylether of the general formulae RCOOR and ROH, respectively, in which R stands for one and the same alkyl radical having from 1 4 carbon atoms, with carbon monoxide in gas phase, in the pre- sence of iodine or bromine or their compounds as a reaction promoter and also in the presence of a carrier-supported catalyst containing noble metal compounds of group VIII of the Periodic System, at temperatures of 130 - 400°C and under pressures of 1 - 150 bars. To this end, a novel carrier-sup- ported catalyst is used in which the carrier material has a noble metal/chelate-compound formed of the noble metal com- pound and a chelator containing organonitrogen, organophos- phorus, organoarsenic or organosulfur groups applied to it.

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