Carbonylation of methyl acetate

Details Carbonylation of methyl acetate Carbonylation of methyl acetate

1982-07-16

1985-04-16

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5156

Patent

active

045115176

ABSTRACT:
Methyl acetate is carbonylated, advantageously to acetic anhydride, in a homogeneous liquid phase, advantageously in a virtually anhydrous reaction medium, in the presence of (a) a cobalt source, (b) a source of iron in the zero oxidation state, (c) an ionic iodide of the formula A.sup.+ I.sup.- in which A.sup.+ is a nitrogen group quaternary onium cation, or an alkali metal cation, and, (d) if appropriate, a carboxylate of the formula A'.sup.n+ (OCOR).sub.n.sup.-, in which n is 1 or 2 and A'.sup.n+ is defined as was A.sup.+, or is an alkaline earth metal cation, with A'.sup.n+ and A.sup.+ either being the same or different, and R is an alkyl, aralkyl or aryl radical having a maximum of 8 carbon atoms, with the total amount of halogen compounds present in the carbonylation reaction medium (expressed in gram atoms of halogen and designated by X.sub.T) being such that the atomic ratio X.sub.T /(A.sup.+ +n.A'.sup.n+) is less than or equal to 1.

REFERENCES:
patent: 2593440 (1952-04-01), Hagemeyer
patent: 2730546 (1956-01-01), Reppe et al.
patent: 2789137 (1957-04-01), Reppe et al.
patent: 2805248 (1957-09-01), Friederich et al.
patent: 3989751 (1976-11-01), Forster et al.

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