Process for producing acetic anhydride
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsTomiya Isshiki, Yasuhiko Kijima, Yuh Miyauchi, Takao Kondo
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Abstract
A process for producing acetic anhydride which comprises reacting methyl acetate or dimethyl ether with carbon monoxide in the presence of a catalyst comprising (a) nickel or a nickel compound, (b) at least one halide selected from the group consisting of bromides, iodides and mixtures thereof and (c) at least one organic nitrogen group compound and together with a specific co-catalyst is disclosed. According to this invention acetic anhydride is produced by using highly active non-expensive catalyst and co-catalyst.
Claims18
A process for producing acetic anhydride which comprises reacting methyl acetate or dimethyl ether with carbon monoxide at a temperature between 100.degree. C. and 250.degree. C. and at a partial carbon monoxide pressure between 3 kg/cm.sup.2 and 150 kg/cm.sup.2 in the presence of a catalyst comprising (a) nickel or a nickel compound, (b) at least one halide selected from the group consisting of bromides, iodides and mixtures thereof and (c) at least one hetero cyclic compound containing at least one trivalent nitrogen atom, together with a co-catalyst, said co-catalyst comprising one or more compounds selected from the group consisting of lithium iodide, lithium acetate, stannous iodide, stannous acetate, stannic iodide and aluminum iodide.
Dependencies are inferred from the claim text.