Process for the joint manufacture of carboxylic acids, carboxylic anhydrides and, if desired, carboxylic acid esters
CA 1258469 A · Owner: Hoechst Aktiengesellschaft · Inventors: Horstermann, Peter; Gehrmann, Klaus; Erpenbach, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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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 reacted at temperatures of 50 to 250°C and under pressures of 0.1 to 120 bars, with an alcohol of the general formula ROH in a molar ratio of 9 : 1 to 1 : 9 under anhydrous conditions, with carbon monoxide and if desir-, ed, hydrogen …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 15, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 15, 2006.
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