990.    ---------------.  [FISCHER, F., AND MEYER, K.]  [Influence of Conditions of Preparation Upon the Efficiency of a Nickel-Manganese-Aluminum Catalyst.]  Brennstoff-Chem., vol. 14, 1933, pp. 47-50; Ges. Abhandl. Kenntnis Kohle, vol. 11, 1934, pp. 542-548; Chem. Abs., vol. 27, 1933, p. 3803.

     Best yields in the benzine synthesis are obtained with 4-5 washings of the catalyst preparation.  Lime water, instead of CaCO₃, as precipitant produces a non-uniform catalyst requiring more washing and giving poor yields.  Previously described conditions for preparation still produce the best catalyst.  Kieselguhr alone or with starch as supporting medium gave the best yields.  Regeneration with H₂ in the presence of NH₃ gave the highest yield.  Technical materials can be used in preparing the catalyst.