Process for the preparation of acetic acid

Details Process for the preparation of acetic acid Process for the preparation of acetic acid

1992-06-19

1996-04-23

Dees, Josee G.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5112

Patent

active

055105238

ABSTRACT:
A process for preparing acetic acid from methanol and carbon monoxide or a mixed gas of carbon monoxide with hydrogen, which process comprises contacting methanol with a gaseous component selected from a group consisting of carbon monoxide and a mixed gas of carbon monoxide with hydrogen of 2% by volume or less in the presence of a carbon-supported rhodium metal catalyst and methyl iodide promoter in vapor phase under the conditions of a reaction temperature of 180.degree.-220.degree. C., a reaction pressure of 5-10 kg/cm.sup.2 .multidot.G, and a weight of catalyst to feed gas flow rate ratio (W/F) of 10-20 g.multidot.h/mole; and a process for preparing acetic acid from methanol and carbon monoxide, which process comprises contacting methanol with carbon monoxide in the presence of a carbon-supported rhodium metal catalyst, methyl iodide promoter and water in vapor phase.

REFERENCES:
patent: 3717670 (1973-02-01), Schultz
patent: 4110359 (1976-12-01), Marion
patent: 4111982 (1978-09-01), Eubanks et al.
patent: 4994608 (1991-02-01), Torrence et al.
Proceedings of the 9th International Catalysis Congress, Fujimoto et al: Effect of Hydrogen on Vapor Phase Carbonylation of Methanol, vol. 3, 1988, pp. 1051-1058.

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