1835.  KEMP, L. C. (The Texas Co.). Combination Process for the Hydrogenation of Carbon Monoxide and the Production of Ammonia. United States Patent 2,494,561. Jan. 17, 1950; appl. filed Dec. 29, 1945. Serial No. 637,953; 6 claims (Cl. 23-198). Chem. Abs., vol. 44, 1950, p. 3240.

Fe catalyst used for and reduced in activity by the synthesis of ammonia from N₂ and H₂ is subsequently used for converting a CO-H₂ mixture to hydrocarbons. The catalyst is then regenerated to the original activity and reused for the ammonia synthesis.