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Return to Abstracts of Literature 1750-1999

Literature Abstracts

 1927.    KODAMA, S., TAHARA, H., FUKUSHIMA, I., IAWO, M., KOMAZAWA, S., AND KIMURA, K.  Hydrocarbon Synthesis From Carbon Monoxide and Hydrogen under Medium Pressure.  II.  Characteristics of Hydrocarbon Synthesis under Medium Pressures With an Iron Catalyst.  Durability of the Catalyst.  Jour. Soc. Chem. Ind. (Japan), vol. 45, 1942, pp. 1263-1271; Chem. Abs., vol. 43, 1949, p. 2397.

         Petroleum synthesis was carried out at 230°-260° under a pressure of 10 kg./cm.² with an equimolecular mixture of CO and H₂:40 cc. of Fe catalyst of composition Fe:Cu:Mn:kieselguhr:H₃BO₃:K₂CO₃=100:25:2:125:20:7 and a gas velocity of 6 m.³ at standard conditions/hr. were used continuously for 180 days to determine the durability of the catalyst.  Catalyst durability under such conditions was excellent and the rate of oil production of about 90 gm./m.³ could be maintained for 6 months by merely raising the temperature slightly.  As the durability of the catalyst is very great even at higher reaction temperatures, Fe catalysts presumably have greater durability than Co catalysts under high pressure.  Other characteristics of the medium-pressure process are the production of water with consequent diminution of CO₂ content in the waste gas and an increased need of solid paraffins in comparison with the synthesis carried out under atmospheric pressure.  The production of CH₄ did not increase even when the activity of catalyst was increased by raising the temperature.