1937. KOPPERS, H., INDUSTRIELLE MAATSCHAPPIJ N. V. [Converting Carbon Monoxide and Hydrogen Into Hydrocarbons.] French Patent 843,874, July 11, 1939. Chem. Abs., vol. 34, 1940, p. 7091.

Method of producing oily hydrocarbons from a mixture of CO and H₂ under normal, higher, or reduced pressure consists in passing a gas containing CO and H₂ in a proportion other than 1:2 over an Fe catalyst, eliminating the oily hydrocarbons, mixing the gas with CO and H₂ in such a proportion that the ratio CO:H₂ in the mixture is 1:2, and passing the mixture over Ni or Co catalyst.