Patent ID: 6784313
Filing Date: 2004-08-31
Classification: C07C

Abstract:
A process for producing a carboxylic acid having (n+1) carbon atoms, comprising:carbonylating an alcohol having n carbon atoms, and/or an ester of said alcohol and said carboxylic acid with carbon monoxide in the presence of a catalytic system containing a rhodium catalyst, said process using a reaction medium for the carbonylation which comprises: (1) a rhodium catalyst; (2) an organic halide corresponding to said alcohol; (3) an ester of said alcohol and said carboxylic acid; (4) said carboxylic acid; optionally (5) water, a haloid acid, an inorganic halogen salt or an acetate; and (6) a cocatalyst selected from the group consisting of arginine, N-acetyl alanine, nitrogen- and oxygen-containing organic compounds represented by the following formula: wherein R1, R2 and R3 are identical or different, and each represents: whereinR4 represents H, an aliphatic group having 1 to 6 carbon atoms, or an arylaliphatic or aromatic group having 6 to 10 carbon atoms; U represents H, an aliphatic group having 1 to 6 carbon atoms or an arylaliphatic group or aromatic group having from 6 to 10 carbon atoms; V and W each represents a covalent bond, an aliphatic group having from 1 to 6 carbon atoms or an arylaliphatic group or aromatic group having 6 to 10 atoms; and X, Y and Z each represents H, metal ion or an aliphatic group having 1 to 6 carbon atoms, with the proviso that at least one of R1, R2 and R3 is a group other than R4.