Process for the joint manufacture of carboxylic acids,...

Details Process for the joint manufacture of carboxylic acids,... Process for the joint manufacture of carboxylic acids,...

C - Chemistry, Metallurgy

07

C

260/495.1, 260/5

C07C 51/12 (2006.01) C07C 51/56 (2006.01) C07C 51/567 (2006.01) C07C 53/08 (2006.01)

Patent

CA 1258469

PROCESS FOR THE JOINT MANUFACUTRE OF CARBOXYLIC ACIDS, CARBOXYLIC ANHYDRIDES AND, IF DESIRED, CARBOXYLIC ACID ESTERS ABSTRACT OF THE DISCLOSURE: Carboxylic acids, carboxylic anhydrides and, if desired, carboxylic acid esters of the general formulae RCOOH, RCOOCOR and RCOOR, respectively, in which R each time stands for one and the same alkyl radical having from 1 to 4 carbon atoms, are produced jointly. To this end, dialkyl ether of the general formula ROR is react- ed at temperatures of 50 to 250°C and under pressures of 0.1 to 120 bars, with an alcohol of the general for- mula ROH in a molar ratio of 9 : 1 to 1 : 9 under an- hydrous conditions, with carbon monoxide and, if desir- ed, hydrogen in the presence of a catalyst system con- sisting of carbonyl complexes of noble metals belonging to group VIII of the Periodic System; an alkali metal iodide, organophosphonium iodide or organoammonium iodide; an alkyl iodide of the general formula RI; and, if desired, compounds of carbonyl-yielding non-noble metals belonging to groups IV, V, VI, VII or VIII of the Periodic system.

486571

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