PATENT

3484. ----- [STANDARD OIL CO.]  Control Catalyst Activity in the Synthesis of Hydrocarbons From Carbon Monoxide and Hydrogen.  British Patent 598,380, Feb. 17, 1948; appl. filed June 18, 1945.  Chem. Abs., vol. 42, 1948, p. 5212.

In the hydrogenation of CO with a fluidized Fischer-Tropsch catalyst the activity of the catalyst gradually decreases.  Means are provided to introduce the active components of the catalyst, such as Co activated with ThO2 or MgO, either in pure form or in concentrated from on a carrier through a hopper to the reaction zone.  The activity of the catalyst is thus maintained at a constant level.  The invention also provides for reducing the activity of the catalyst, if desired by introducing the inert carrier to the reaction zone.