石油学会誌
Print ISSN : 0582-4664
20 巻, 2 号
選択された号の論文の4件中1~4を表示しています
  • 溶剤不溶分の生成速度
    福井 行正, 細井 提吉, 向田 平八郎, 牧田 尚, 西村 淳
    1977 年 20 巻 2 号 p. 130-133
    発行日: 1977/02/01
    公開日: 2009/01/30
    ジャーナル フリー
    Kinetic studies have been made on the formation of solvent insoluble matters in the pitch, which was prepared by the heat treatment of Murban and Gach Saran vacuum residues in the temperature range of 410-440°C.
    The solvent extraction was carried out by use of n-Pentane, Benzene and Quinoline. The yields of four fractions of n-Pentane soluble (PS), n-Pentane insoluble/Benzene soluble (PI•BS), Benzene insoluble/Quinoline soluble (BI•QS), and Quinoline insoluble (QI) were measured in the course of the reaction.
    Supposing that the reaction of forming insoluble matters proceed successively as follows, PS→k1PI•BS→k2BI•QS→k3QI, →k0Gas/Oil
    it was found that the decomposition reaction (producing gas and oil) and the polymerization-condensation reaction (forming insoluble matters) are of the first order with respect to each fraction, except for the zero order reaction of QI formation.
    The relationship between the average chemical structure and the rate of formation of solvent insoluble matters was discussed with the results of NMR and Molecular Weight measurement.
  • 森 彰一郎, 内山 正夫
    1977 年 20 巻 2 号 p. 134-138
    発行日: 1977/02/01
    公開日: 2009/01/30
    ジャーナル フリー
    The effect of reaction pressure on the catalytic behavior such as activity, selectivity and product patterns for the steam dealkylation of toluene and xylene isomers was studied under the pressure ranging from 0 to 30kg/cm2•G. The conversion of toluene into benzene over the Rh or Ni catalyst increased considerably with the rising reaction pressure without the deterioration of benzene selectivity. On the contrary, a marked decrease in the dealkylation rate was observed over the Rh-UO3 catalyst. Quite a large amount of CH4 (25.8mol%) was observed at 30kg/cm2 in comparison with the amount of CH4 (3.3mol%) at the atmospheric pressure. The predominant part of CH4 may be considered to be formed by consecutive hydrodealkylation of aromatics which proceeds more readily at the higher pressure.
    The reaction between steam and non-aromatic hydrocarbons such as n-heptane, methylcyclohexane and isooctane and the steam dealkylation of toluene and xylene fractions of the naphtha thermally cracked residue containing non-aromatics were also studied for the effect of pressure.
  • 金崎 康生, 大塚 幹雄, 岡田 秋盛
    1977 年 20 巻 2 号 p. 139-141
    発行日: 1977/02/01
    公開日: 2009/01/30
    ジャーナル フリー
    Hydrogen sulfide must be removed prior to titration in the mercaptan analysis of the petroleum fraction by the silver nitrate titration method.
    It has been found that sodium hydrogen carbonate can be substituted for cadmium sulfate which is widely used for removing hydrogen sulfide in the mercaptan analysis.
  • 各種残油のガス化
    森田 義郎, 大沢 伸行, 深瀬 聡, 山崎 誠二郎, 菊地 英一
    1977 年 20 巻 2 号 p. 142-146
    発行日: 1977/02/01
    公開日: 2009/01/30
    ジャーナル フリー
    The steam reforming of eight different residual oils for the production of fuel gas was studied in a fluidized catalyst bed of calcined dolomite at a temperature of 900°C. In spite of a wide variety of the property of feed oils, the gas yield and the C.C.R. value of feed oils were correlated by a straight line; the gas yield linearly decreased with the C.C.R. value. With additional experiments at 700°C, it was believed that deposited carbon played an important role as the intermediate in the steam reforming of residual oils on the dolomite catalyst. The concentration of H2S in the product gas was always about 0.1% by volume regardless of the sulfur content of feed oils. The ratios in the partial pressure of steam to H2S were very close to the equilibrium constant of the reaction: H2S+CaO=H2O+CaS. It was concluded that the dolomite reduces the H2S concentration in the product gas to its equilibrium value.
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