Method of preparing aliphatic carboxylic acids

Details Method of preparing aliphatic carboxylic acids Method of preparing aliphatic carboxylic acids

C - Chemistry, Metallurgy

07

C

260/529.5

C07C 51/00 (2006.01) C07C 51/14 (2006.01) C07C 51/353 (2006.01) C07C 53/00 (2006.01)

Patent

CA 1146971

D. 75,758-1-FB METHOD OF PREPARING ALIPHATIC CARBOXYLIC ACIDS ABSTRACT Carboxylic acids having 2 to 6 carbon atoms can be converted into their higher homologues by heating the acids with synthesis gas (carbon monoxide and hydrogen) at a pressure of at least 500 psi (35.5 bars) in the presence of a catalyst comprising a palladium or nickel compound (e.g. an oxide or salt of palladium or nickel, or a nickel carbonyl or hydrocarbonyl ) and a group VB ligand (e.g. triphenylphosphine), and an iodide or bromide promoter (e.g. a palladium or nickel halide, or a separately-included alkyl halide). Homologous acids having one more carbon atoms than the starting acid are formed with good selectivity.

379880

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