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.