2916.     RUBINSHTEIN, A. M., PRIBYTKOVA, N. A., KAZANSKIĬ, B. A., AND ZELINSKIĬ, N. D.  [Catalysts for Benzine Synthesis From Carbon Monoxide and Hydrogen Which Do Not Require High-Temperature Reduction.]  Bull. acad. sci. U.R.S.S., Classe sci. chim., 1941, pp. 41-48; Chem. Zentralb., 1942, II, p. 971; U.O.P. Co. Survey Foreign Petroleum Literature Transl. 334; Chem. Abs., vol. 37, 1943, p. 5217.

        Catalysts produced from KAlFe (CN)₆, Ni²Fe (CN)₆, and Co₂Fe(CN)₆ by decomposition in a H₂ atmosphere yielded no liquid hydrocarbons under the experimental conditions, temperatures 230°-280° and space velocity of 18-50, but only catalyze CH₄ formation.  A Co-Cu-Mn catalyzer, produced by precipitation with K₂CO₃ on kieselguhr, in a single experiment yielded 204 cc. benzine per m.³ of gas, whereas a catalyst of similar composition prepared by igniting the nitrates was not as effective.  The kieselguhr required no preliminary ignition or treatment with HCl or Na₂CO₃.  A 2-stage synthesis with Co-Cu-Mn catalyst gave benzine yields of 160 cc. per m.³ over a long time with space velocities of 100-120.  With prolonged tests, lower catalyst activity was noted with intermittent than with continuous operation.