2946.     ---------------.  [RUHRCHEMIE, A.-G.]  [Production of Cobalt Catalyst by Precipitation With Carbon Dioxide-Ammonia Gas Mixtures.]  FIAT Reel K-20, frames 359-362; PB 70,211; TOM Reel, 287.

        Communication from the Kaiser Wilhelm Institut für Kohlenforschung concerning the production of a very active catalyst.  Co in the form of its nitrate, together with the corresponding amounts of Th or Mg nitrates, is dissolved in water.  A NH3-CO2 gas mixture then is introduced cold.  By test filtration the optimum precipitation is determined, and the stream of NH3 is switched off.  With the CO2 still flowing, the solution is heated to the boiling point, kieselguhr is added, and the whole is mixed thoroughly.  The catalyst then is dried and reduced with H2.