3468.     TSUNEOKA, S., MURATA, Y., FUNASAKA, W., AND NISHIO, A.  Fischer Process -- Japan.  Jour. Fuel Soc. Japan, vol. 18, 1939, p. a7.

        Continuous investigations were carried out by the Imperial Fuel Research Institute on:

        (1)  Studies on gas space velocity.  The yield of gasoline was maximum at a certain gas velocity, either when the amount of the catalyst and the length of the catalyst zone or the gas space velocity and the length of the catalyst zone were maintained constant.  The content of unsaturated hydrocarbons in the synthesized gasoline increased with an increase of gas velocity.

        (2)  The relation between the degree of unsaturation of the synthesized gasoline and various conditions.

        (3)  Studies on Ni-Co catalyst prepared by the precipitation method.  U₃O₈ and ThO₂ were found to be superior promoters both for Ni-Co (50:50) and Ni-Co-Mn (50:50:15) catalysts; the yield of gasoline was 166 cc. per m.³ with Ni-co-Mn-U₃O₈-ThO₂-kieselguhr (50:50:15:5:3:125) and 179 cc. per m.³ with Ni-Co-Mn-U₃O₈-kieselguhr (50:50:20:20:125) catalysts.  The optimum ratio of Ni:Co was found to be 50:50.  The reduction temperature of a Ni-Co-Mn-U₃O₈-ThO₂-kieselguhr (50:50:15:5:3:125) catalyst was lowered from 400° C. to 300° C. owing to the addition of 10% of Cu, notwithstanding that the activity was depressed greatly.

        (4)  Removal of organic S compounds from industrial gas.  The content of organic S compounds in coal gas was reduced from 22.6 gm. S per 100 m.³ to 0.2 gm. S per 10 m.³ and less by the use of CuO-PbCrO₄, Ni, and Fe-Cu catalysts at temperatures of 450°, 350°, and 300° C., and the same space velocity of 330.  The organic S compounds in coal were quantitatively fixed with Fe₂O₃ on pumice and Luxmasse at a temperature of 350° C. and a space velocity of 330.  The organic S compounds in coal were quantitatively fixed with Fe₂O₃ on pumice and Luxmasse at a temperature of 350° C. and a space velocity of 330, the content of S being reduced to 0.2 gm. S per 100 m.³ and less.

        (5)  Activation of a gasoline catalyst by slow oxidation with air.  The activity of a Ni-Co-Mn-U₃O₈-ThO₂-kieselguhr (50:50:15:5:3:125) catalyst was increased by about 10% and 8%, respectively, when the catalyst, after reduction at 400° C., was oxidized slowly with air directly or after the replacement by H₂ with CO₂.

        (6)  Studies on Fe catalysts prepared by the precipitation method.  Fe-Cu catalysts, prepared by the precipitation method, were studied, and 94 cc. per m.³ (CO:H₂=1:1) of gasoline was obtained with a Fe-Cu-Mn-Al₂O₃-kieselguhr-K₂CO₃ (100:25:2:3:125:2) catalyst.