FRAMSTAELLNING AV VATTENFRIA KARBOXYLSYROR UR ALKOHOLER UNDER ANVAENDNING AV RODIUM-KOMPLEX- KATALYSATORER OCH EN ORGANISK ESTERKAELLA.

摘要

A process for the production of organic carboxylic acids and organic carboxylic acid anhydrides by the catalytic reaction of an alcohol of the formula ROH and carbon monoxide in contact with an organic ester source and a homogeneous catalyst system of rhodium metal atom, a phosphorus containing ligand in which there is present at least one oxo (=0) oxygen atom attached to a phosphorus atom or a carbon atom to form a Z group and the @ or@ group in said Z group is located at least one carbon atom removed and preferably from 2-4 carbon atoms removed from the phosphorus atom of the molecules represented by the formulas and a halogen source, under mild reaction conditions, wherein R min is aryl, alkaryl, aralkyl, or alkyl, and wherein 1 or more of said R min groups can be substituted with a Z group but not more than 3 of said R min groups in the molecule are so substituted; a is an integer from 0-4; b is an integer from 0-3; and Z is P(O)R min R min ; -C(O)OR sec or C(O)R sec , wherein R sec is R min or -H; and wherein ROH is methanol or a mixture of methanol and at least one higher alcohol.