Process for making acetic anhydride

Details Process for making acetic anhydride Process for making acetic anhydride

C - Chemistry, Metallurgy

07

C

260/536.5

C07C 53/12 (2006.01) C07C 51/54 (2006.01) C07C 51/56 (2006.01)

Patent

CA 1167065

PROCESS FOR MAKING ACETIC ANHYDRIDE ABSTRACT OF THE DISCLOSURE The disclosure relates to a process for making acetic anhy- dride by reacting methyl acetate and/or dimethylether with carbon monoxide, if desired in admixture with up to 20 vo- lume % hydrogen, under practically anhydrous conditions at temperatures of 120 to 270°C, under pressures of 1 to 500 bars in the presence of a catalyst system containing nickel or a nickel compound, an organic iodine or bromine compound as well as a tertiary or quaternary organic phosphorus com- pound. More particularly, a catalyst system containing a titanium or zirconium compound as an additional constituent is used,

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