313. CARKEEK, C. R. (The Texas Co.). Cascade Catalyst System. United States Patent 2,534,853, Dec. 19, 1950; appl. filed Nov. 29, 1947, Serial No. 788,887; 8 claims (Cl. 260-449.6). Chem. Abs., vol. 45, 1951, p. 2182.

Patent Abstracts

313. CARKEEK, C. R. (The Texas Co.). Cascade Catalyst System. United States Patent 2,534,853, Dec. 19, 1950; appl. filed Nov. 29, 1947, Serial No. 788,887; 8 claims (Cl. 260-449.6). Chem. Abs., vol. 45, 1951, p. 2182.

Powdered catalyst, in several ranges of particle size, are distributed in a number of reaction zones, each operating under a predetermined linear velocity of reactant upflow such as will fluidize a specific range of particle sizes and carry overhead finer particles. Each successive zone has reactant flow suitable for a successively lower range of particle size. The finer particles below each range are carried out of the reaction zone by the upflowing reactants and deposited in the succeeding zone operating at a relatively lower rate of reactant upflow. The process is particularly applicable to Fischer-Tropsch synthesis using Fe or Ru catalyst, because under conditions giving high liquid-product yield, progressive disintegration of catalyst powder into particles of decreasing size occurs. 5 United States patents cited.

CARLSON, C. S. See abs. 814, 2406, 2407, 2408, 2409, 2410.