Process for stabilizing carbonylation catalyst in soluble form

Details Process for stabilizing carbonylation catalyst in soluble form Process for stabilizing carbonylation catalyst in soluble form

1980-12-29

1984-02-21

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

2604109R, 260413, 2604654, 560 8, 560 86, 560 97, 560105, 560109, 560114, 560198, 560200, 560204, 560207, 560232, 560233, 560248, 562406, 562497, 562517, 562518, 562520, 562522, 562608, C07C 5110, C07C 5112, C07C 6736, C07C 6737

Patent

active

044331657

ABSTRACT:
The present invention provides for an improved process wherein an olefin, an alcohol, or an ester, halide or ether derivative of said alcohol is reacted with carbon monoxide in a liquid phase in the presence of a catalyst system that contains (a) a rhodium component, and (b) an iodine or bromine component. By passing at least a portion of the liquid reaction mass from the reaction zone to a separation zone of substantially lower CO partial pressure, at least a portion of the carbonylation products, as well as unreacted carbon monoxide, inert gases, and unreacted olefin, alcohol, or alcohol derivatives are vaporized and can be withdrawn from the separation zone. Precipitation of the rhodium catalyst under carbon monoxide deficient conditions is prevented or retarded by addition to the system of a stabilizer component selected from N,N,N',N'-tetramethyl-o-phenylenediamine and 2,3'-dipyridyl.

REFERENCES:
patent: 3845121 (1974-10-01), Eubanks et al.

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