891. GROOMBRIDGE, W. H., AND PAGE, R. Catalytic Purification of Gases. British Patent 507,593. June 19, 1939. Chem. Abs., vol. 34. 1940. p. 611.

Patent Abstracts

Gas mixtures, particularly CO and H₂, are freed from S by passage at an elevated temperature, 400º-600º, over a catalyst comprising Fe₂O₃ and ZnO: for example, Fe₂O₃ 60-80% and ZnO 40-20%. In the gas of gas mixtures such as water gas the ratio between CO and H₂ may be altered to make the product suitable for conversion into CH₄ or higher hydrocarbons or oxygenated compounds such as aliphatic alcohols by conducting the process with the addition of H₂O vapor. Where possible, the catalytic treatment is preceded by a washing with alkali solution to remove as much of the S as possible, and it is followed by a similar washing to remove the remaining S.