389. ------. [CLARK, A.] (Phillips Petroleum Co.). Synthesis of Hydrocarbons. United States Patent 2,567,596, Sept. 11, 1951; appl. filed Mar. 25, 1946, Serial No. 656,695; 4 claims (Cl. 260-449.6).

Patent Abstracts

389. ------. [CLARK, A.] (Phillips Petroleum Co.). Synthesis of Hydrocarbons. United States Patent 2,567,596, Sept. 11, 1951; appl. filed Mar. 25, 1946, Serial No. 656,695; 4 claims (Cl. 260-449.6).

In performing the synthesis of hydrocarbons form CO and H₂, it is highly desirable to prevent the accumulation of liquid hydrocarbons in the reaction zone since they cover the catalyst and prevent intimate contact between catalyst and reaction gases, thus decreasing catalyst activity. Such liquid hydrocarbons comprise a mixture of C₁₀-C₃₅₀ hydrocarbons of an average molecular weight of about 750. The removal of accumulated liquid hydrocarbons is effected by conducting the hydrogenation of CO in a horizontal elongated reaction chamber, the reactants entering 1 end and the reaction effluents draining from the bottom of the other by gravity. The reaction chamber may also be placed in a slanting position. The temperature chamber also may be placed in a slanting position. The temperature range for the synthesis operation and for the various catalysts that may be used is 150º-400º, pressure 100-125 p. s. i., space velocity 80 for Co catalysts and up to 400 for sintered Fe catalysts. Composition of the feed is normally in a molar ratio of CO:H₂=1:2-2:3. The yield of liquid hydrocarbons is about 100 gm. Per standard m³. and the conversion of CO in a single pass is about 70%. The condensed products at the outlets is about 20-25% of the total product and contains less wax than that obtained by conventional operation.