Production of acetic anhydride

Details Production of acetic anhydride Production of acetic anhydride

1982-04-07

1984-02-07

Gerstl, Robert

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260549, C07C 5112

Patent

active

044302738

ABSTRACT:
The invention provides a process for making acetic anhydride, wherein methyl acetate and/or dimethylether is (are) reacted with carbon monoxide under substantially anhydrous conditions, at temperatures of 350 to 575 K and under pressures of 1 to 300 bars in the presence of a catalyst system comprised of noble metals belonging to group VIII of the periodic system of the elements, or their compounds and iodine and/or its compounds. More specifically, an aliphatic carboxylic acid with 1 to 8 carbon atoms and at least one heterocyclic aromatic compound, in which at least one hetero atom is a quaternary nitrogen atom are used as promoters.

REFERENCES:
patent: 3852346 (1974-12-01), Forster
patent: 4115444 (1978-09-01), Rizkalla
Klingsburg, Pyridine, pp. 3-5 (1961).
Cram et al., Organic Chemistry, p. 590 (1964).

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