C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/536.5, 260/5
C07C 51/12 (2006.01) B01J 31/18 (2006.01) C07C 51/56 (2006.01) C07C 53/08 (2006.01) C07C 53/12 (2006.01)
Patent
CA 1248549
- 35 - ABSTRACT 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 an a homogeneous catalyst system of a rhodium metal atom, a phosphorus-containing ligand in which there is present at least one oxo (=O) 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 formulae: (V) Image (VI) and a halogen source, under mild reaction conditions, wherein R' is hydrogen, aryl or aralkyl, and wherein 1 or more of said R' groups can be substituted with a Z group but not more than 3 of said R' 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'R'; -C(O)OR" or C(O)R", wherein R" is R' or -H; and wherein ROH is methanol or a mixture of methanol and at least one higher alcohol.
488454
Schreck David J.
Wegman Richard W.
Sim & Mcburney
Union Carbide Corporation
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