Preparation of acetic anhydride

Details Preparation of acetic anhydride Preparation of acetic anhydride

1980-11-21

1983-02-15

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5154

Patent

active

043740707

ABSTRACT:
The preparation of acetic anhydride by the carbonylation of methyl acetate in the presence of rhodium, an iodine compound and lithium at elevated temperatures and pressures is improved by the inclusion of about 2 to 7 volume percent hydrogen in the gas fed to the carbonylation reactor. The presence of hydrogen suppresses tar formation and increases reaction rate.

REFERENCES:
patent: 3579566 (1971-05-01), Fenton
patent: 4046807 (1977-09-01), Kruckertz
patent: 4252741 (1981-02-01), Porcelli et al.
Derwent Abstracts, 75-47921 Japan, Showa, Denkokk, Apr. 28, 1975.
Derwent Abstracts, 75-47922 Japan, Showa, Denkokk, Apr. 28, 1975.
Chem. Tech., 1971, p. 600, Roth et al., "Low Pressure Process for Acetic Acid via Carbonylation".

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