PATENTS

2775. ----- [RIBLETT, E. W.] (Hydrocarbon Research, Inc.).  Process for Catalytic Conversion.  United States Patent 2,616,914, Nov. 4, 1952; appl. filed May 11, 1946, Serial No.669,007; 2 claims  (Cl. 260-449.6).

        Invention prevents catalyst particles from being entrained and carried out of the reaction zone by the gaseous effluent by using large catalyst particles, such as 40- to 100-mesh, mixed with smaller particles of inert material, such as sand, silica, or glass, having a smaller settling rate and adapted to assume good fluidization in the prevailing flow of reactant gases.  The proportion of inert fines to catalyst particles may be 1-2 parts inert fines to 1 part catalyst, although such proportion may fall as low as 0.1 part or be as great as 5 or 10 parts per part of catalyst.  The process is particularly adaptable to Fischer-Tropsch synthesis, using Fe catalyst containing 1-2% K oxide and 2-3% alumina.  10 United States patents cited