3608.     ---------------.  [WATANABE, S., MORIKAWA, K., AND IGAWA, S.]  Synthesis of Benzine From Carbon Monoxide by Means of Catalytic Reduction at Atmospheric Pressure.  II.  Effect of Temperature Upon Synthesis.  Jour. Soc. Chem. Ind. (Japan), vol. 37, 1934, B, pp. 385-389; Brennstoff-Chem., vol. 15, 1934, p. 413; Chem. Abs., vol. 28, 1934, p. 6982.

        Plots are presented for yield, % of C, and % of H of the reaction products as functions of the reaction temperature, which show that, for benzine synthesis, it is most desirable to keep the reaction temperature nearly at the optimum temperature, in this case 220, or somewhat below it, as a small rise above the optimum temperature usually promotes undesirable side reactions.  The activity of the catalyst is a function of the location of the maximum point of the curve of gas contraction versus temperature of reduction, a greater activity being associated with a lower temperature value.  The Co catalyst, containing Cu, prepared from the carbonate gave an optimum reduction temperature of 250-300 and that prepared from the nitrate one of 190-200.  The temperature rise during synthesis, if too great, may adversely affect the activity of the catalyst.