巻号一覧
17 巻, 3 号
選択された号の論文の7件中1～7を表示しています
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古川 靖大, 浅野 耕一, 小松 洋二1974 年 17 巻 3 号 p. 214-220
発行日: 1974/03/01
公開日: 2009/01/30
ジャーナル フリーEsterification reaction of diisobutylene monochloride and phthalic anhydride or potassium phthalate in the various solvents was studied, and it was found that diisooctenyl phthalate was obtained at a high yield in the presence of DMSO or DMF solvents. It was considered that this reaction was promoted by the formation of ionic intermediate of diisobutylene monochloride with these solvents. Reaction conditions in the esterification of diisobutylene monochloride and phthalic anhydride in the presence of Na2CO3 and DMSO were investigated. Diester yield of about 85% based on monochloride was obtained and about 10% of isooctenyl alcohol formed as by-product. Among the four isomers (primary chlorides and secondary chloride) contained in diisobutylene monochloride, primary chlorides reacted selectively in this reaction and only primary diester was obtained without isomerization.抄録全体を表示PDF形式でダウンロード (529K) -
古川 靖大, 小松 洋二1974 年 17 巻 3 号 p. 221-225
発行日: 1974/03/01
公開日: 2009/01/30
ジャーナル フリーIn the synthesis of diisooctenyl phthalate by the reaction of diisobutylene monochloride and phthalic anhydride, prevention of coloring during the reaction, decolorization treatment of the product, cause of the coloring and performance of the product as plasticizer for polyvinyl chloride resin were studied. The results obtained were as follows;
(1) Reduction method such as the treatment by LiAlH4 and NaBH4 or the catalytic hydrotreating were found to be effective in the decolorization treatment for the diisooctenyl phthalate (diester).
(2) Oxidation to the unsaturated bond in the diester during the esterification reaction seemed to be a main cause of the coloring.
(3) Performance of the diester as plasticizer for polyvinyl chloride was characterized by a higher softening temperature, a higher weight loss by heating and a lower color change by heating.抄録全体を表示PDF形式でダウンロード (357K) -
柴谷 治雄, 木下 久夫1974 年 17 巻 3 号 p. 226-229
発行日: 1974/03/01
公開日: 2009/01/30
ジャーナル フリーThermal decomposition of 2-butene was studied in a flow apparatus under an atomospheric pressure, at temperatures ranging from 670 to 793°C, residence times ranging from 0.05 to 1.5sec, and nitrogen/2-butene mole ratio of 15. The main reaction products were methane, propene and butadiene, each amounting from 40 to 50 moles per 100 moles of 2-butene decomposed. Other products were hydrogen, ethylene, 2-pentene and 3-methyl-1-butene. Cis-trans isomerization of 2-butene and isomerization to form 1-butene were also observed.
The rate of decomposition obeys the first order rate equation and the rate constant is evaluated as log k (sec-1)=14.8-70, 000/4.575T. Experimentally observed product distributions and reaction rates can be accounted for by the free radical chain process initiated by unimolecular fission of terminal C-H bond of 2-butene.抄録全体を表示PDF形式でダウンロード (266K) -
野瀬 良治, 井上 清1974 年 17 巻 3 号 p. 230-233
発行日: 1974/03/01
公開日: 2009/01/30
ジャーナル フリーAdsorption of sodium dinonylnaphthalenesulfonate (NaDNNS) tagged with radioactive sulfur 35 was studied at the steel-benzene interface at room temperature. The adsorption increased with time, requiring 20hrs to reach a maximum value, and its equilibrium adsorption was about one tightly packed monolayer. Adsorbed NaDNNS molecules were not desorbed by benzene rinsing but 65% of adsorbed NaDNNS molecules were desorbed by exchanging with untagged NaDNNS molecules in benzene solution. The competitive adsorption of NaDNNS and Pb Naphthenate was not Langmuirian and the relative strength of adsorption was NaDNNS>Pb Naphthenate.抄録全体を表示PDF形式でダウンロード (328K) -
山崎 大蔵, 新川 利和, 重村 貞人1974 年 17 巻 3 号 p. 234-239
発行日: 1974年
公開日: 2013/02/22
ジャーナル フリーSummary: Some troubles by hydrogen sulfide stress crrosion cracking of austenitic stainless steels have occurred in Japanese refineries.
We studied the stress corrosion cracking and revealed some interesting results as follows.
The cracking is affected by stress including stress concentration and residual stress.
Cracking threshold stress is very high, and is assumed to be about 100kg/mm2.The cracking is affected by environmental conditions such as hydrogen sulfide partial pressure and temperature.For instance, a fail-safe limit line for SUS 304 is 80°C for hydrogen sulfide partial pressure of 1.5kg/cm2, and140°C for hydrogen sulfide pressure of 0.5kg/cm2 or under.
Acidic contaminants and ammonium chloride act as cracking accelelators. And the cracking varies depending upon the kind of steel. Cracking sensitivity becomes lower according to increase in nickel content. For instance, the sensitivity becomes lower in the order of SUS304→SUS321→SUS316→SUS310.抄録全体を表示PDF形式でダウンロード (9998K) -
中島 豊比古1974 年 17 巻 3 号 p. 240-245
発行日: 1974/03/01
公開日: 2009/01/30
ジャーナル フリーViscosity and colloidal property of various blown asphalts were investigated and the following results were obtained:
1) Blown asphalts generally exhibit non-Newtonian flow behaviour at lower temperatures, but as temperature elevates weaker knots among resins break and the flow changes into Newtonian at the temperature near the softening point. At around the softening point, the desorption of resins from asphaltenes occurs and the flow changes into non-Newtonian, and changes into Newtonian again at the temperature further rises.
(2) With lower grade blown asphalts, the activation energy of the flow, E, reduces remarkably above the softening point. While with higher grade blown asphalts, E below the softening point agrees with that above the softening point. And with the progress of blowing, E below the softening point decreases and that above the softening point increases.
These phenomena can be explained by consideration of increasing asphaltenes and development of network structure among asphaltenes.
(3) By blowing, the peptizability of asphaltenes decreases and the peptizing power of malthenes increases, but the state of peptization of asphaltenes grows worse, therefore developing the gel type colloidal structure.抄録全体を表示PDF形式でダウンロード (1306K) -
SO2を酸化剤とするトルエンのアンモ酸化反応小林 義雄, 寺西 士一郎, 多羅間 公雄1974 年 17 巻 3 号 p. 246-250
発行日: 1974/03/01
公開日: 2009/01/30
ジャーナル フリーA vapour phase catalytic ammoxidation reaction using SO2 as an oxidizing agent was investigated as follows: C6H5CH3+NH3+SO2→C4H5CN+2H2O+H2S+2.0kcal/mole. This reaction is a little exothermic and the equilibrium constants are very large at wide range of temperatures (Kp=4×108: at 300-500°C). Therefore, the reaction is thermochemically very favourable and is free from trouble of deep oxidation as SO2 is a weak oxidizing agent.
In consequence of the investigation with various catalysts it was found that the reaction was promoted even by γ-Al2O3 alone into benzonitrile at a yield of Ca. 70(mole)%/fed toluene and moreover the activity of γ-Al2O3 improved by the addition of CuO, Fe2O3, Cr2O3, MoO3, WO3 and V2O5. The conversion of 93.9 (mole) %/fed toluene and the selectivity of 99.2 (mole)% to benzonitrile were obtained by the γ-Al2O3-V2O5-MoO3 catalyst at 430°C.
The preferable molar ratio of reactants was NH3_??_SO2_??_toluene. The maximum yield of benzonitrile was observed at 440-470°C. The activity of catalyst changed with the reaction time. In the case of γ-Al2O3 the activity increased gradually during the period of Ca. 1.5hrs after the start of reaction and then began to decrease after 26-27hrs. This decay of catalyst can be explained by the deposition of sulphureous and carbonaceous matters over the catalyst surface. The decayed catalyst was regenerated to 98% of the activity before the decay by means of slow burning of these matters in the air current.抄録全体を表示PDF形式でダウンロード (360K)
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