1942. ------. [KOPPERS, H., INDUSTRIELLE MAATSCHAPPIJ N. V.] [Synthesis of Hydrocarbons From Carbon Monoxide and Hydrogen.] French Patent 843,847, July 11, 1939; appl. filed Sept. 23, 1938. Chem. Zentralb., 1940, I, p. 2424.

Gases, such as water gas, containing CO and H₂ in proportion of 1:1 to 1:1.25 are first converted over Fe catalyst (Fe + Cu) at 225°-250° to olefin-rich hydrocarbons according to 2 CO + H₂=CO₂ + (CH₂)_x. The residual gas rich in H₂, after separation of the liquid hydrocarbons and CO₂ and correction of the gas composition to CO:H₂=1:2, is used for the production of more liquid hydrocarbons at 185°-200° over a Co or Ni catalyst according to CO + 2 H₂=H₂O + (CH₂)_x. The Fe catalyst is put into operation with a S-free gas: after reaching its highest efficiency (after about 5 days) the Fe catalyst has become insensitive to S and can then be further operated with a S-containing gas.