3844. ----- [VOORHIES, A.] (Standard Oil Development Co.). Hydrocarbon Synthesis. United States Patent 2,533,072, Dec. 5, 1950; appl. filed June 5, 1947, Serial No. 752,801; 4 claims (Cl. 260-449.6).

Catalyst carbonized in the Fischer-Tropsch synthesis is with drawn from the reactor at synthesis temperature 550°-750° F. and decarbonized with H₂ at a higher decarbonization stage, 900°-1,200°. The additional heat is supplied by addition of CO to the decarbonization stage. The CO comes from synthesis feed gas added to the H₂ in suitable proportion. In general, about 10-50 n cu. ft. of H₂ and 1-5 n cu. ft. of CO are required to remove 0.05-0.20 lb. C per lb. catalyst. 6 United States patents cited.