588. EASTMAN, D. (The Texas Co.). Catalytic Synthesis of Hydrocarbons With Controlled Recycle of Carbon Dioxide. United States Patent 2,436,957, Mar. 2, 1948: appl. filed Dec. 20, 1945. Serial No. 636,226; 8 claims (Cl. 260-449.6). Chem. Abs., vol. 42

Patent Abstracts

588. EASTMAN, D. (The Texas Co.). Catalytic Synthesis of Hydrocarbons With Controlled Recycle of Carbon Dioxide. United States Patent 2,436,957, Mar. 2, 1948: appl. filed Dec. 20, 1945. Serial No. 636,226; 8 claims (Cl. 260-449.6). Chem. Abs., vol. 42, 1948, p. 3932.

Effluent from the catalytic conversion of CO and H₂ into hydrocarbons consisting of normally gaseous and liquid constituents is separated into a liquid and a gaseous portion. The gases themselves are next divided into a major and a minor stream, the former consisting essentially of a gaseous paraffinic and olefinic hydrocarbons, N₂ and CO₂ and unreacted CO and H₂, and the latter of almost pure CO₂. The former is entirely recycled to the process together with enough CO₂ from the latter to maintain the CO₂ in the reactor feed within the limits of about 15-30%. There should be 1-4 vol. of recycled material comprising both the major gaseous stream and the CO₂ from the minor stream per vol. fresh feed.