A method for the production of alkyl polyethylene glycol carboxylic acids and poly glycol dicarboxylic acids by means of direct oxidation

摘要

The object of the invention is a process for the preparation of compounds of the formula (ia) and / or compounds of the formula (ib), whereinR¹ a saturated, linear or branched alkyl radical having 1 to 22 carbon atoms or a a - or polyunsaturated linear or branched alkenyl radical having from 2 to 22 carbon atoms,R², R³ independently of one another are hydrogen, a linear or branched alkyl radical having 1 to 22 carbon atoms, a a - or polyunsaturated linear or branched alkenyl radical having from 2 to 22 carbon atoms or an aryl radical having 6 to 12 carbon atoms,X is an alkylene radical having 2 to 4 carbon atoms,n is a number between 0 and 100,m is a number between 1 and 250 andB is a cation or hydrogen, and / or of the corresponding protonoerten carboxylic acids, in that one or more compounds of the formula (iia) and / or of the formula (iib), wherein r¹, R², R³, X, n and m have the significance given above, with oxygen or oxygen-containing gases in the presence of a gold-containing catalyst and at least one alkaline compound are oxidized.