978. ------. [HEMMINGER, C. E.] (Standard Oil Development Co.). Method of Making Gasoline. United States Patent 2,540,581, Feb. 6, 1951: appl. filed Sept. 18, 1946, Serial No. 697,807; 3 claims (Cl. 260-449.6). Chem. Abs., vol. 45, 1951, p. 4024.

Patent Abstracts

978. ------. [HEMMINGER, C. E.] (Standard Oil Development Co.). Method of Making Gasoline. United States Patent 2,540,581, Feb. 6, 1951: appl. filed Sept. 18, 1946, Serial No. 697,807; 3 claims (Cl. 260-449.6). Chem. Abs., vol. 45, 1951, p. 4024.

2-stage process is used in which the major part of the synthesis takes place in the 1^st stage at lower temperatures and a lower H₂ : CO ratio (2 : 1) than used in the 2d stage. The high H₂ : CO ratio 2-20 : 1, CO₂: CO=5-10:1 in the 2d stage controls the C content of the catalyst and converts CO₂ to hydrocarbons and H₂O, owing to the water gas shift reaction. The decrease of CO₂ and H₂ in the exit gas decreases the volume of gas to the absorption equipment and results in higher yields of liquid products based on feed gas. The gas feed to the 2d stage may or may not be gases from which the lighter hydrocarbons have been removed by absorption. 2 or more single-pass reactors may be used. The 1^st reactor may have a small amount of recycle vent gas feed and the 2d may be once through. The 1^st may be once through and the 2d use recycle. Successively lower pressures may be used in each reactor as 450 p. s. i. in the 1^st and 250 p. s. i. in the 2d. Each reactor may have its own condensing system. Different catalysts may be used. 6 United States patents cited.