390. ------. [CLARK, A.] (Phillips Petroleum Co.). Synthesis of Hydrocarbons, United States Patent 2,610,200, Sept. 9, 1952; appl. Filed May 15, 1946. Serial No. 669,792; 4 claims (Cl. 260-449.6). Chem. Abs., vol. 47, 1953, p. 1350.

Patent Abstracts

390. 390. ------. [CLARK, A.] (Phillips Petroleum Co.). Synthesis of Hydrocarbons, United States Patent 2,610,200, Sept. 9, 1952; appl. Filed May 15, 1946. Serial No. 669,792; 4 claims (Cl. 260-449.6). Chem. Abs., vol. 47, 1953, p. 1350.

Synthesis of hydrocarbons from CO and H₂ in the presence of a Co catalyst is carried out in 2 stages. In the first stage the proportion of H₂: CO=1:3 by volume and conversion of the CO amounts to not more than 70%, The C₃ products of reaction are separated from the effluent, and a residual gas is recovered containing unreacted CO and H₂ together with gases inert in the synthesis reaction, the vol. % CO and the H₂:CO ratio being <that in the feed gas to the 1^st conversion stage. Additional CO is added to the residual gas to raise the vol. % of CO to that present in the feed gas to the 1^st conversion stage without increasing the H₂ concentration therein. The resulting gas mixture is introduced into a 2^nd stage conversion zone under the same conditions as in the 1^st stage. The yields of additional hydrocarbons thus synthesized are equal to those of the 1^st stage. The reaction temperatures in each stage are within the range of 175°-225° and the pressures 5-50 atm.

See abs. 2181.