巻号一覧
16 巻, 7 号
選択された号の論文の4件中1～4を表示しています
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1,2,4-トリメチルベンゼンとフォルムアルデヒドとの縮合反応生成物の組成と構造河合 是, 山崎 康男, 佐野 章1973 年 16 巻 7 号 p. 567-571
発行日: 1973/07/01
公開日: 2009/01/30
ジャーナル フリーThe structure and composition of the crude condensation products of 1, 2, 4-trimethylbenzene (1, 2, 4-TMB) with formaldehyde were studied. The crude condensation products were gas chromatographically separated to fraction I and II. IR spectrum of fraction I displayed two adsorption bands at 870cm-1, characteristic of an one-adjacent hydrogen system, and at 810cm-1, characteristic of a two-adjacent hydrogen system. Therefore, it was believed that fraction I was composed of 2, 3, 6, 2', 4', 5'-hexamethyldiphenylmethane (2, 3, 6, 2', 4', 5'-HMDPM) and 2, 3, 5, 2', 3', 6'-HMDPM.
Fraction II displayed bands 890-860cm-1, but didn't displav a band near 810cm-1. It was believed that fraction II was composed of 2, 4, 5, 2', 4, '5'-HMDPM and 2, 3, 5, 2', 4', 5'-HMDPM. These were also supported by NMR spectra of fraction I and II.
From cracking behaviors of a series of unsymmetric diarylmethanes, it was recognized that the fashion of cleavage between methylene carbon and aryl carbon is determined by the numbers of methyl group and their positions. From these results the hydrocracking behavior of unsymmetric HMDPM was determind, and the compositions of the crude condensation products were estimated as follows.
2, 4, 5, 2', 4', 5'-HMDPM 80-84%, 2, 3, 6, 2, '4', 5'-HMDPM 13-16%, 2, 3, 5, 2', 4', 5'-HMDPM<4%, 2, 3, 5, 2', 3', 6'-HMDPM<2%抄録全体を表示PDF形式でダウンロード (295K) -
中村 宗和, 赤沼 耕一, 大塚 啓一, 鈴木 羚至1973 年 16 巻 7 号 p. 572-577
発行日: 1973/07/01
公開日: 2009/01/30
ジャーナル フリーThe dehydrogenation of 2, 3-dimethylbutane, 3-methylpentane and methylcyclopentane over Pt-C catalyst was studied at low conversion levels and temperatures ranging from 400 to 480°C, under the hydrogen atmospheric pressure.
The dehydrogenated products included all possible alkenes and cycloalkenes possessing the same skeletal structures as raw materials and were approximately in thermodynamic equilibrium at conversions as low as 8%. The compositions of these product mixtures observed at 460°C were: 43% 2, 3-dimethyl-1-butene and 57% 2, 3-dimethyl-2-butene; 9% 3-methyl-1-pentene, 11% 2-ethyl-1-butene, 31% 3-methyl-cis-2-pentene and 49% 3-methyl-trans-2-pentene; 68% 1-methylcyclopentene, 20% 3-methylcyclopentene, 10% 4-methylcyclopentene and 2% methylenecyclopentane in each skeletal hydrocarbons, respectively.
At the initial step of the reaction, however, it was shown that 2, 3-dimethyl-1-butene, 3-methyl-1-pentene and 3-methylcyclopentene were formed beyond their thermodynamic equilibrium compositions, respectively.
It was found that the rate of the dehydrogenation was influenced by the ratio of hydrogen to hydrocarbon and that in the absence of hydrogen the reaction did not proceed at all. The reaction rate increased with the molar ratios, being constant at the molar ratio of one and above.
These results suggested that the hydrogen played an important role on the dehydrogenation mechanism over Pt catalyst used in the present study.抄録全体を表示PDF形式でダウンロード (447K) -
横井 重三, 大森 弘一, 縄田 義祐1973 年 16 巻 7 号 p. 578-587
発行日: 1973/07/01
公開日: 2009/01/30
ジャーナル フリーThe desperate shortage of land in Japan for industrial development has necessitated extensive land reclamation of areas previously underwater areas.
The reclaimed land is usualy unstable. Therefore before designing refinery plants to be built on such ground, study of the behavior of such structurers during earthquake loadings is essential.
This paper presents the analysis of the dynamic response of certain structure at Kawasaki Refinery, Toa Nenryo Kogyo K. K.
1) First the basic properties of the foundation were determined by measurement of elastic wave and micro-tremor.
2) The finite element method was applied to a section including the revetment and the tanks, using the result of 1), and the displacements and the stresses in the foundation during an earthquake were calculated. The safety of the foundation was assessed.
3) Finally the dynamic response of a flare-stack as a single discrete mass system was analyzed.
The analytical study described above appeared to be very helpful in clarifying the dynamic behavior of the refinery foundation during earthquakes and assessment of the safety of structures.抄録全体を表示PDF形式でダウンロード (2858K) -
久保 康生, 中沢 上, 佐藤 正男1973 年 16 巻 7 号 p. 588-591
発行日: 1973/07/01
公開日: 2009/01/30
ジャーナル フリーA method for determining ppb content of lead, chromium and copper in the sea water accurately, quickly and conveniently has been developed by solvent extraction-atomic absorption spectrophotometry.
In this mothod, 2% APDC was added to a sample water and its acidity was ajusted to pH of 3-5 with 0.5mol HCl solution. This mixture was heated up to approximately 80°C to make the complex complete. After this mixture cooled, three metal ions were extracted with MIBK simultaneously. The extract was aspirated in the atomic absorption spectrophotometer to determine lead, chromium and copper content. A standard addition method was adopted in the atomic absorption analysis.
Analytical results of a reference sample prepared with 2.8% artificial sea water were satisfactory with respect to accuracy and repeatability. The error of results by this method was about 10%.抄録全体を表示PDF形式でダウンロード (260K)
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