Production of carboxylic acids from carbonylation of alcohol

Details Production of carboxylic acids from carbonylation of alcohol Production of carboxylic acids from carbonylation of alcohol

1992-02-24

1993-07-13

Prescott, Arthur C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5112

Patent

active

052275191

ABSTRACT:
This invention relates to an improved process for synthesizing carboxylic acids by the carbonylation of alcohol. An alcohol such as methanol is reacted with carbon monoxide in a liquid reaction medium containing a rhodium (Rh) catalyst stabilized with an haloacetic acid, especially trifluoroacetic acid (TFAA), along with alkyl iodide such as methyl iodide (MeI) in specified proportions. The present reaction system is not only characterized by unexpectedly high catalyst stability, but also characterized by the high reaction rate for the formation of acetic acid. The improvement resides in the employment of trifluoroacetic acid as the catalyst promoter at a temperature from 180.degree. C. to 200.degree. C. The primary advantage of the catalyst system of this invention is the enhancement of the rate of carbonylation. The other advantage of the catalyst system is that they are readily soluble and thermally stable, making them resistant to deposition.

REFERENCES:
patent: 3769329 (1973-10-01), Paulik et al.
patent: 4628041 (1986-12-01), Smith et al.
patent: 4690912 (1987-09-01), Paulik et al.
patent: 4792620 (1988-12-01), Paulik et al.
patent: 5026907 (1991-06-01), Wegman et al.
patent: 5155261 (1992-10-01), Marston et al.
J. Hjortkjaer et al., "Rhodium Complex Catalyzed Methanol Carbonylation. Effects of Medium and Various Additives", Ind. Eng. Chem., Prod. Res. Dev., vol. 16, No. 4, 1977, pp. 281-285.
B. L. Smith et al., "The Rhodium-Catalyzed Methanol Carbonylation to Acetic Acid at Low Water Concentrations: The Effect of Iodide . . . ", J. Molecular Catalysis, 39 (1987) pp. 115-136.

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