PATENTS

2971. ----- [RUHRCHEMIE, A. G.]  [Method for Activating Hydrogenation Catalysts.]  German Patent Appl. R 104,999.  PA 294,891, filed Apr. 15, 1939 (Cl. IV d-12 o).  FIAT Reel B- 176, frames 283-287; PB 83,253: PB Report 412, May 15, 1945: Auszüge deut.   Patent Anmeldungen, vol. 6, p. 298.

Preparation of synthesis catalysts by precipitating from sulfate instead of nitrate solution and activating by washing with alkali carbonate or hydroxide solution.  For example, a catalyst containing 100 parts Co, 10 parts MgO, 5 parts ThO₂, and 200 parts kieselguhr is prepared from a solution containing 40 gm. per 1. of Co in the form of sulfate.  The precipitate obtained by addition of soda is washed first with H₂O, 1 1. per 25 gm. Co, then with N/20 (NH₄)₂CO₃, 1 1. per 25 gm. Co. and finally with H₂O, 1 1. per 25 gm. Co.