Process for the preparation of acetic anhydride

Details Process for the preparation of acetic anhydride Process for the preparation of acetic anhydride

1979-12-26

1981-08-18

Killos, Paul J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260546, C07C 5156

Patent

active

042845858

ABSTRACT:
Acetic anhydride is prepared from methyl acetate and/or dimethyl ether in carbonylation processes comprising the use of a halide, carbon monoxide and a Group VIII noble metal in the presence of promoters comprising metallic zirconium and an organo-phosphorus compound or an organo-nitrogen compound wherein the phosphorus and nitrogen are trivalent, or an arsine of the formula: ##STR1## wherein R and R.sup.1 are monocyclic aryl groups or alkyl groups and R.sup.2 is the radical ##STR2## a monocyclic aryl group or an alkyl group, and wherein R.sup.3 and R.sup.4 are each a monocyclic aryl group or an alkyl group, n being zero or a digit from 1-20.

REFERENCES:
patent: 4102920 (1978-07-01), Bartish
patent: 4115444 (1978-09-01), Rizkalla

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