522. ------. [DREYFUS, H.] Catalytic Production of Hydrocarbons From Hydrogen and Carbon Monoxide. United States Patent 2,231,990, Feb. 18, 1941; appl. filed July 20, 1938, Serial No. 220,345, in Great Britain Aug. 5, 1937; 6 claims (Cl. 260-449). Chem

Patent Abstracts

522. ------. [DREYFUS, H.] Catalytic Production of Hydrocarbons From Hydrogen and Carbon Monoxide. United States Patent 2,231,990, Feb. 18, 1941; appl. filed July 20, 1938, Serial No. 220,345, in Great Britain Aug. 5, 1937; 6 claims (Cl. 260-449). Chem. Abs., vol. 35, 1941, p. 3418.

Reaction is effected in the presence of a hydrogenating catalyst such as Co activated with ThO₂, at a pressure normally maintained above 0.5 atm. but periodically reduced below 0.5 atm. without interrupting the flow of reactant gases whenever the activity of the catalyst falls considerably to restore is activity.