770. ------. [GARBO, P. W.] (Hydrocarbon Research, Inc.). Synthesis of Hydrocarbons in the Presence of a Fluid-Phase Catalyst. United States Patent 2,576,931. Dec. 4, 1951: appl. filed June 25, 1949, Serial No. 101,403: 5 claims (Cl. 260-449.6). Che

Patent Abstracts

770. ------. [GARBO, P. W.] (Hydrocarbon Research, Inc.). Synthesis of Hydrocarbons in the Presence of a Fluid-Phase Catalyst. United States Patent 2,576,931. Dec. 4, 1951: appl. filed June 25, 1949, Serial No. 101,403: 5 claims (Cl. 260-449.6). Chem. Abs., vol. 46. 1952. p. 2783.

Vertical cylindrical reactor holding a fluidized catalyst mass is continuously supplied at its lower end with an upflowing stream of synthesis gas in the ratio of H₂:CO=1.5:1 to 3.0:1. Operating temperatures are about 600º-650º F. and pressures, 400 p. s. i. The catalyst consists of solid particles varying from 60 to 400-mesh prepared by reducing magnetite and promoted by about 1% Al₂O₃ and 1.5% K₂O. The linear velocity of the gases flowing up through the catalyst is about 0.3-1.5 ft. per sec., or enough to hold the mass in uniform dense fluid phase condition. Catalyst is continuously drawn off from the bottom of the reactor, elevated, and reintroduced into the reaction zone at the pseudoliquid level of the catalyst mass, thereby effecting a continual downward movement of the catalyst in the reaction zone at about 3 ft. per sec. The total recovery of C₃+ hydrocarbons including the minor proportions of oxygenated compounds amounts to 1.51 gal. per 1,000 cu. ft. of synthesis gas, whereas without circulation of the catalyst the total recovery is only 1.32 gal.