巻号一覧
11 巻, 6 号
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室井 要, 小野 光正, 石井 八重子1968 年 11 巻 6 号 p. 440-442
発行日: 1968/06/25
公開日: 2009/01/30
ジャーナル フリーKarl-Fischer method was applied to determination of water in liquefied gases, after absorption of water with the anhydrous solvent from the liquefied sample in a special pressure cylinder at room temperature. By this method, a few ppm of water in the sample can accurately and easily be determined in about fifteen minutes.抄録全体を表示PDF形式でダウンロード (207K) -
ジイソプロピルベンゼンとベンゼンとの反応大沼 浩, 徳久 寛1968 年 11 巻 6 号 p. 443-447
発行日: 1968/06/25
公開日: 2009/01/30
ジャーナル フリーTransalkylation between di-iso-propylbenzene and benzene was studied with anhydrous aluminum chloride as catalyst. The reaction was carried out in a cylindrical reaction vessel at temperatures ranging from 15 to 70°C, reaction times from 2 to 1, 800 minutes, benzene to di-iso-propylbenzene mole ratios from 0.5 to 10, and aluminum chloride to di-iso-propylbenzene mole ratios from 0.1 to 2. The products were analyzed with gaschromatography. Cumene was a main product, other product being tri-iso-propylbenzene. Neither gaseous products nor condensation products other than those mentioned above could be detected. The reactions could be represented as follows; C6H4(iso-C3H7)2+C6H6=2C6H5•iso-C3H7 and 2C6H4(iso-C3H7)2=C6H5•iso-C3H7+C6H3(iso-C3H7)3. Equilibrium constants of these reactions were 4.3 and 0.34 respectively. These values were found to be in agreement with those estimated thermodynamically. Heat of reaction was very small with each of there reactions. The rate of the former reaction was nearly identical with that of cymene. This reaction was of the first order with respect to di-iso-propylbenzene and 0.7th order with respect to aluminum chloride. The values of activation energy and apparent A-factor were 23kcal/mole and 1.6×1013sec-1 respectively.抄録全体を表示PDF形式でダウンロード (395K) -
トリアルキルアルミニウムを含む炭化水素混合物の組成分析猪俣 紀, 安藤 宏, 榎本 稔, 清水 征生, 雨宮 登三, 西方 宏之1968 年 11 巻 6 号 p. 448-454
発行日: 1968/06/25
公開日: 2009/01/30
ジャーナル フリーIn the progress of the study on co-dimerization of ethylene and propylene, which is the first stage of the isoprene synthesis process, it was necessary to establish a reliable procedure for analyzing mixtures of tri-alkyl aluminums and hydrocarbons. The mixtures were treated with HCl+H2O in a specially designed apparatus and the hydrocarbon mixtures removed were divided into two or three portions and analyzed with gaschromatography. By this procedure tri-alkyl aluminums were smoothly hydrolized without any cracking of long alkyl radical into shorter paraffins or oleffins. Various calculation methods combined with some calibrations were also compared.抄録全体を表示PDF形式でダウンロード (553K)
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