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.