3470.     ---------------.  [TSUTSUMI, S.]  Synthesis Gasoline From Carbon Monoxide and Hydrogen.  I.  Rept. Imp. Fuel Research Inst. Japan, No. 31, 1935, 62 pp.; Jour. Fuel Soc. Japan, vol. 14, 1935, pp. 110-116 (in English); Brennstoff-Chem., vol. 17, 1936, p. 54; Chem. Abs., vol. 29, 1935, p. 7627; vol. 30, 1936, p. 845.

        Gas mixture consisting of 1 part CO and 2 H2 was used for the investigation.  The effect of various factors on the course of the synthesis was investigated with a Co:Cu:U3O8:kieselguhr (1:0.1:0.12:1) catalyst.  With this catalyst the highest yield, namely 97 gm. per m.3 mischgas, was obtained at 210.  With rising temperature the formation of gaseous hydrocarbons decreased.  The most favorable gas velocity was 3-6 l. per hr., using 3 gm. Co.  A gas mixture of 1 CO and 2 H2 gave the best yield per m.3 of synthesis gas.  With a gas rich in H2 the reaction temperature can be lowered; this reacts favorably on the life of the catalyst.  A ratio of Co:kieselguhr=1:1 or 3:4 made the most active catalyst.  Besides kieselguhr, alumina, pumice, and silica gel were used as carrier material; in no case was the activity equal to that with kieselguhr.  The best raw material for the preparation of the catalyst was the nitrate.  The catalyst prepared from the acetate was equal in activity, whereas that made from the sulfate was less active.  When the chloride was used, the catalyst was virtually inactive.  Further tests were performed with Ni:Mn catalysts.  The best results here were obtained with a Ni catalyst to which 20% Mn, 8% U3O8, and 4% ThO2 were added.  The maximum yield amounted to about 115 gm. of liquid product per m.3 of mischgas.  With a mixed catalyst of Co:Ni:Cu the results were more unfavorable, the activity decreasing with increasing content of Ni and Cu. the reason for this behavior lies in the formation of mixed crystals between Ni and Cu.  The mechanism of the reaction is discussed from the standpoint of carbide formation.  Mention is made in this connection that with mixtures of CO2 and H2 higher hydrocarbons are not formed, only CH4.  No carbide formation was observed.