巻号一覧
15 巻, 5 号
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井上 正美, 榎本 三郎1972 年 15 巻 5 号 p. 372-378
発行日: 1972/05/01
公開日: 2009/01/30
ジャーナル フリーThe methylation of aromatic compounds with methanol in vapour or liquid phase was studied on various catalysts. In these reactions, a flow method was adopted and the liquid phase methylation of phenol was carried out in an autoclave. The reaction products were analyzed with gas liquid chromatography.
As aromatic materials, o-chlorotoluene, o-, m-, p-xylene, phenol, o-cresol, aniline and o-toluidine were examined. The catalysts effective in methylation were characteristic of the substituents, i. e., SiO2-Al2O3-BF3 to o-chlorotoluene, SiO2-Al2O3 modified with ethylenediamine and Al2O3-HF to the selective methylation of o-, m- and p-xylene, condensed phosphoric acid (CPA)-kieselguhr (KG), CPA-BF3-KG and Al2O3-MgO-SiO2 to the m-position of phenol, Ce2O3-MnO-MgO to the o-position of phenol, and Al2O3-MgO to o-toluidine and aniline, respectively. Finally, the relation between catalytic activity and selectivity of the methylated position was also discussed from the standpoint of the acid properties of the catalysts.抄録全体を表示PDF形式でダウンロード (559K) -
飯島 博1972 年 15 巻 5 号 p. 379-384
発行日: 1972/05/01
公開日: 2009/01/30
ジャーナル フリーThe physical properties and the dynamic viscoelasticity of the modified asphalt were investigated and the following results were obtained.
(1) The asphalt modified by the catalytic semiblowing has the gel type colloid structure as expressed by As/P, where As is the asphaltene content and P is the state of peptization of asphaltene micelle. Therefore, the modified asphalt becomes less temperature-susceptible and has a high softening point and a low brittle point. The relaxation spectrum takes high value for the wide range of relaxation time. It indicates that the modified asphalt has more elastic property than the straight asphalt.
(2) The asphalt modified by adding polymer shows low temperature susceptibility. The relaxation spectrum gets higher value for the wide range of relaxation time as the asphalt has a lower brittle point.抄録全体を表示PDF形式でダウンロード (300K) -
ゼオライト触媒を用いたプロピレンによるプソイドキュメンのアルキル化反応森田 義郎, 加賀谷 峰夫, 木村 孝良1972 年 15 巻 5 号 p. 385-388
発行日: 1972/05/01
公開日: 2009/01/30
ジャーナル フリーLiquid-phase catalytic reaction of pseudocumene with propylene has been studied using zeolite catalysts at 90-160°C. Under this condition, alkylation proceeded selectively and main products were 5- and 6-isopropylpseudocumene. These monoalkylated products were produced simultaneously, and their composition was not influenced by the reaction temperature and the type of zeolite catalysts used. The reaction was interpreted as of the first order kinetics with respect to pseudocumene. At a 95% conversion, the yield of 1, 2, 4, 5-tetraalkylbenzene was 66%. The alkylation activity increased rapidly with the increase of ion exchange level above 50% and correlated with acid amounts at H0_??_+3.3.抄録全体を表示PDF形式でダウンロード (238K)
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