Haldor Topsoe A/s

John B Hansen

Haldor F Topsoe

Finn H Joensen

From a synthesis gas mainly consisting of hydrogen and carbon oxides an acetic acid product consisting of acetic acid, acetic anhydride and/or methyl acetate is prepared by reactions known per se in a technically simple reaction sequence and a high conversion degree when the reactions are combined such that in a first step at a pressure of 5-200 bar and a temperature of 150.degree.-400.degree. C. the synthesis gas is converted in the gas phase in a first reactor to methanol, of which at least a substantial proportion is converted to dimethyl ether in the same reactor in the presence of one or more catalysts which together catalyze the reactions

Process for preparing acetic acid, methyl acetate, acetic anhydride or

A method of preparing methanol by reacting synthesis gas comprising hydrogen and carbon oxides in a fixed bed of methanol synthesis catalyst. The reaction of the synthesis gas is conducted under conditions where condensation of methanol occurs on the catalyst. Pressure, temperature and/or space velocity of the gas at the exit of the catalyst bed are adjusted to where conversion levels of the gas leads to formation of liquid methanol in the catalyst bed by exceeding the dew point of the reaction mixture.

Method of preparing methanol

The present invention relates to a process for preparing acetic acid, acetic acid methyl ester or acetic anhydride or mixtures thereof by converting a synthesis gas mainly containing hydrogen and carbon oxides, by first converting the synthesis gas catalytically into a gas mixture containing methanol and dimethyl ether and then carbonylating this mixture catalytically into acetic acid and/or methyl acetate and/or acetic anhydride.

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Helsingor, Denmark

John B Hansen