Carbonylation of methyl acetate

Details Carbonylation of methyl acetate Carbonylation of methyl acetate

1982-06-11

1985-02-19

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5112

Patent

active

045004749

ABSTRACT:
Methyl acetate is carbonylated, advantageously to acetic anhydride, in a homogeneous liquid phase, in a virtually anhydrous reaction medium, in the presence of: (a) a cobalt source, (b) a ruthenium source, (c) an ionic iodide of the formula: A.sup.m+ I.sub.m.sup.- in which A.sup.m+ is a nitrogen group quaternary onium cation, an alkali metal or alkaline earth metal cation, or a lanthanide or actinide group metal cation, (c') 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.m+, with A'.sup.n+ and A.sup.m+ either being the same or different, and R is an alkyl, aralkyl or aryl radical having a maximum of 8 carbon atoms, and (d) hydrogen, 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 /(m.A.sup.m+ +n.A'.sup.n+) is less than or equal to 1.

REFERENCES:
patent: 2730546 (1956-01-01), Reppe et al.
patent: 4115444 (1978-09-01), Rizkalla
patent: 4189441 (1980-02-01), Braca et al.
Clark, N. G., Modern Organic Chemistry (1964), Oxford Univ. Press. Publ., at p. 246.

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