Patent ID: 6346644
Filing Date: 2002-02-12
Classification: C07C

Abstract:
A process for producing organic carboxylic acid having (n+1) carbon atoms from alcohol having n carbon atoms and carbon monoxide, wherein the carbon monoxide and the alcohol are reacted in a liquid reaction medium comprising of a rhodium catalyst system, and subsequently the carboxylic acid is recovered from the resulting reaction product; during the course of carbonylation in the carbonylation reactor, the liquid reaction medium for the rhodium catalyst system comprises the following composition: (1) the rhodium catalyst, (2) the iodide derivative corresponding to the alcohol which is being reacted, (3) the ester formed by carboxylic acid and alcohol, (4) the carboxylic acid, (5) at least a finite quantity of water, (6) one or more catalyst stabilizers as shown in the following formula (A): R1-R5: at least one is â€”(CH2)mY; m=0Ëœ6; Y is COOH, COOR, SO3H, or SO3R; R&boxH;CnH2n+1, n=1-5.