Nickel-catalyzed carbonylation process

Details Nickel-catalyzed carbonylation process Nickel-catalyzed carbonylation process

1996-02-20

1999-05-04

Dees, Jose'G.

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

Organic compounds

Carboxylic acids and salts thereof

562517, 560232, C07C 5110, C07C 6736

Patent

active

059005041

ABSTRACT:
Disclosed is an improved liquid phase process for the preparation of an acetyl product comprising acetic acid, by the carbonylation of a carbonylatable reactant material comprising methanol, methyl acetate, dimethyl ether or a mixture thereof in the presence of a catalyst system comprising a nickel component and an iodide component. In the separation of the crude acetyl product mixture from a liquid containing the non-volatile catalyst components, precipitation of metals and other catalyst components is avoided or minimized by maintaining a hydrogen pressure of at least 0.34 bar absolute within the flash evaporator zone wherein the separation occurs.

REFERENCES:
patent: 3845121 (1974-10-01), Eubanks et al.
patent: 4252741 (1981-02-01), Porcelli et al.
patent: 4482497 (1984-11-01), Rizkalla
patent: 4659518 (1987-04-01), Rizkalla et al.
patent: 5237097 (1993-08-01), Smith et al.

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