9.     AICHER, A., MYDDLETON, W. W., AND WALKER, J. Production of Hydrocarbon Oils From Industrial Gases. I. Jour. Soc. Chem. Ind., vol. 54, 1935, pp. 313-320 T; Chem. Abs., vol. 29, 1935, p. 8289.

   In the production of hydrocarbon oils from CO and H₂, the total S content of the gas is reduced to approximately 0.1 grain per 100 cu. ft. Organic S compounds are removed by hydrogenation over a CuO-PbCrO₄-Et orthosilicate catalyst, and H₂S is then absorbed. The purified gas is passed over a Ni-Mn-Al catalyst supported on kieselguhr and cemented together by Et orthosilicate at 450°-480°. As the 1st few inches of the catalyst bed perform much more work than the succeeding layers, there is a tendency to produce a hot spot. Adsorption of the product on the surface of the catalyst exercises a retarding action, increasing with the partial pressure of the oil in the catalyst chamber. The preferred method of operation is to use the catalyst in 2 or 3 parts and to remove the products formed after each stage. This results in a grading of oil with definite variation in content of unsaturated hydrocarbons, increased throughput of gas per unit volume of catalyst and an increased yield of oil from a given volume of gas.