Preparation of anhydrides

Details Preparation of anhydrides Preparation of anhydrides

1984-05-17

1985-08-13

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5156

Patent

active

045349126

ABSTRACT:
Acetic anhydride is prepared by reacting, at elevated temperature, methyl acetate or dimethyl ether with carbon monoxide in the presence of an effective amount of a catalyst which comprises: (1) cobalt, (2) a compound containing at least one quaternary nitrogen or phosphorus atom and (3) a source of iodide or bromide wherein the atomic ratio of iodide or bromide to cobalt is from 0.5:1 to 5:1. The compound containing at least one quaternary nitrogen or phosphorus atom can optionally be generated in situ by a quaternization reaction.

REFERENCES:
patent: 2730546 (1956-01-01), Reppe et al.

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