PATENT

3230. ----- [SAUTER, E..]  (Braunkohle-Benzin A. G.).  [Starting Contact Catalysts.]  German Patent 728,766, Dec. 3, 1942; appl. B 182,388 filed Mar. 16, 1938 (Cl.12 o-1.03).  FIAT Reel AA-90, frames 1,460-1,461; PB 70,275; Chem. Zentralb., 1943, I, p. 1742; Meyer Transl. PC-S-II, Fischer-Tropsch, vol. 5, chap. 159, 1949, p. 44; Chem. Abs,. vol. 38, 1944, p.470.

Contact catalysts for synthesizing hydrocarbons out of CO and H₂ are treated with CO₂ to render them immune to air.  The contacts are then arranged within the reaction oven.  To lower the initial activity of the catalyst, the layers that first come in contact with the reacting gases are treated with the solid or liquid synthesized product within the reaction oven.