Process for the preparation of acetic anhydride
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United States of America Patent
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Oct 21, 1986
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N/A
app pub date -
Mar 7, 1984
filing date -
Dec 24, 1980
priority date (Note) -
Expired
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Abstract
The invention relates to a process for the preparation of acetic anhydride by carbonylation. In the process, carbon monoxide is reacted with methyl acetate in the liquid phase, in a carboxylic acid, in the presence of an effective amount of nickel, methyl iodide, an ionic iodide selected from the group consisting of quaternary ammonium iodides, quaternary phosphonium iodides, sodium iodide, potassium iodide and cesium iodide, and a co-catalyst selected from the group consisting of lithium salts and alkaline earth metal salts.
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