PATENTS

3872.   ------.  [WATSON, C. W.]  (The Texas Co.).  Process for Catalytic Conversion of Carbon Oxides.  United States Patent 2,486,894, Nov. 1, 1949; appl. filed Nov. 2, 1945, Serial No. 626,425; 3 claims (Cl. 269-449.6).  Chem. Abs., vol. 44, 1950, p. 1675.

In catalytic conversion of CO and H₂ into hydrocarbons, the production of CO₂ and CH₄ is reduced, and the yield of higher molecular weight hydrocarbons is increased by the addition of CO₂ to the feed gas and maintenance of a temperature gradient throughout the reaction zone.  CO₂ is added in such amounts that the ratio of molecules of H₂ to the sum of the molecules of CO₂ and CO passing to the reaction zone is 0.6-1.0.  The initial contact between the synthesis gas and the catalyst is at a temperature 10°-100° F. lower than the temperature of final contact.  Conversion of CO is 95-99.5%.  6 United States patents cited.