巻号一覧
2 巻, 2 号
選択された号の論文の21件中1～21を表示しています
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TOMOKO NAKAHARA, MITSUHO HIRATA1969 年 2 巻 2 号 p. 137-142
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーThe Solution model of hydrogen in hydrocarbons is presented for the calculation of Henry''s constant. This model includes the following considerations.
i) To avoid the large volume change of the gas in the dissolving process, the gas before mixing should be brought to the state where its molar volume is the same as that which the hydrogen whould have in the dilutely dissolved state. This partial molar volume of hydrogen at infinite dilution is obtained from the fact that in an ideal solution the free volumes of solute and solvent are equal.
ii) The mutual interaction of hydrogen molecules which are dissolved quite dilutely in a liquid phase can be neglected. Then the mixture of hydrogen and hydrocarbons is ideal in both vapor and liquid phase.
For eight hydrogen-hydrocarbon systems, except for the hydrogen-methane system, the calculated Henry''s constants agree well with the experimental results.抄録全体を表示PDF形式でダウンロード (453K) -
PRESSURE EFFECT ON THE AZEOTROPIC MIXTURE OF ETHYLENE DIAMINE-WATERMITSUHO HIRATA, SEIJIRO SUDA, TOSHIKATSU HAKUTA, KUNIO NAGAHAMA1969 年 2 巻 2 号 p. 143-149
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーEthylene diamine-water system is known to form a maximum boiling mixture with 2O to 25 per cent by weight of water at 118.5°C8) or 118.7°C4) under atmospheric pressure. In this paper experimentally determined results for the vapor-liquid equilibrium relations under various pressures are presented and the pressure effect on azeotropism is discussed.
From the results disappearance of the azeotrope was clearly shown under slightly pressurised conditions above 1.77 atm. absolute and the degree of variation in relative volatility with composition decreased with increase in pressure. Possibility of separating the mixture into its components without adding a third component was also shown from the resultant vapor-liquid equilibrium relations.抄録全体を表示PDF形式でダウンロード (521K) -
ACETIC ESTER-ALCOHOL WITH POTASSIUM ACETATE AND ZINC CHLORIDEMOTOYOSHI HASHITANI, MITSUHO HIRATA1969 年 2 巻 2 号 p. 149-153
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーVapor-liquid equilibrium data have been obtained for the systems methyl acetate-methanol and ethyl acetate-ethanol with potassium acetate and with zinc chloride at atmospheric pressure. The relative volatility increased little for the ethyl acetate-ethanol-potassium acetate system, but it increased considerably for other systems. The breaking of azeotropy was observed in the systems with zinc chloride.
An empirical equation is proposed to correlate vapor-liquid equilibrium data for the systems containing salt. The equation includes terms of both salt concentration and liquid composition.抄録全体を表示PDF形式でダウンロード (372K) -
NOBUO MITSUISHI, OSAMU MIYATAKE, MITSUGU TANAKA1969 年 2 巻 2 号 p. 153-158
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーA theoretical analysis of heat transfer to Newtonian fluids in laminar flow in concentric annul! was developed under the conditions of constant temperature inner wall and insulated outer wall, taking into account the temperature dependency of viscosity and density.
The arithmetic mean Nusselt number was obtained as a function of the Graetz number with K, μw/μo and Grw/Rew as parameters.
Furthermore, experimental data were obtained for two different diameter ratios K.
It was found that theoretical predictions are in reasonably good accord with experimental data.抄録全体を表示PDF形式でダウンロード (415K) -
ANALYSIS OF THE REACTION MECHANISM BY NONLINEAR LEAST SQUARES METHODKENJI HASHIMOTO, KEIICHI TSUTO, KAZUHISA MIYAMOTO, NOBORU HASHIMOTO, N ...1969 年 2 巻 2 号 p. 158-163
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーA systematic approach to determining the kinetics of multiple reactions catalyzed by solid catalyst is demonstrated for the hydrogenation of mesityl oxide. First, obviously inadequate models were eliminated by a check of the initial rates, and secondly the precise parameters were evaluated by a nonlinear least squares method. It was found that this reaction is a consecutive reaction consisting of two steps in both of which reaction occurs between the dissociated hydrogen atoms adsorbed on the surface of the catalyst and the adsorbed molecules of the organic substances.抄録全体を表示PDF形式でダウンロード (493K) -
SYNTHESIS OF ETHYLENE OXIDEHIROSHI KOMIYAMA, HAKUAI INOUE1969 年 2 巻 2 号 p. 163-170
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーA new model, in which both effectiveness factors of micropore and macropore are taken into consideration, has been proposed for the analysis of the selectivity of the intermediate product in a consecutive gas-solid catalytic reaction. This model is applied to the synthesis of ethylene oxide with silver catalyst, on which many papers had been presented without regard to the effectiveness factors of the catalyst used. Many experimental results in those papers are studied and analyzed by this model. From these analyses it may be concluded that: (1) this catalyst system is well simulated by tha model, (2) the reaction scheme is the simple consecutive one C2H4→C2H4O→CO, CO2 with k1/k2 about 16, and (3) tha ratio of the effectiveness factors of micropore are regarded as constant in this system, and so tha main factors that dominate the selectivity of ethylene oxide are tha ratio of the effectiveness factors of macropore and the conversion of ethylene.抄録全体を表示PDF形式でダウンロード (619K) -
KUNIO YOSHIDA, DAIZO KUNII1969 年 2 巻 2 号 p. 170-174
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーA method of analysis is presented for the reaction between a porous solid and a gas when the diffusion resistance is significant. The kinetic expression used is linear with respect to the concentration of reacting gas.
As a typical example, experiments of gasification of graphite sph-res with carbon dioxide were carried out and the results were compared with the proposed model, where the change of the porous structure due to the reaction is considered. The computed values agreed favorably with the experimental data for the early stage of the reaction.抄録全体を表示PDF形式でダウンロード (568K) -
MASARU ISHIDA, TAKASHI SHIRAI1969 年 2 巻 2 号 p. 175-179
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーTwo types of nomographs are presented for solid-gas reactions based on "unreacted-core shrinking model". One is to determine the temperature at the reacting core surface, which has so far been calculated only by numerical computations. The other is to predict whether or not thermal or transitional instability exists during the course of reactions. A triangular diagram for reaction paths is also presented to show the reaction regime and the inter-relating effects among the three rate controlling steps (i. e., chemical reaction, mass transfer, and heat transfer) during the course of reactions, with two numerical illustrations.抄録全体を表示PDF形式でダウンロード (494K) -
MASARU ISHIDA, TAKASHI SHIRAI1969 年 2 巻 2 号 p. 180-185
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーBurning rate of a carbon-cement sphere in a hot air stream was investigated both analytically and experimentally. Under diffusion-controlled conditions, the interface between the reacted shell and the unreacted core could very distinctly be recognized and its radius could be determined from the temperature recording chart at any moment. Based on non-isothermal analysis of an unreacted-core model, the data could be explained satisfactorily by the effective diffusivity, De, which showed good correspondence with the permeability coefficient, k.抄録全体を表示PDF形式でダウンロード (578K) -
MASAAKI TERAMOTO, TOSHIO NAGAYASU, TATSURO MATSUI, KENJI HASHIMOTO, SH ...1969 年 2 巻 2 号 p. 186-192
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーThe selectivity of (1, 1) order gas-liquid reactions was studied by taking into account mass transfer in the diffusion film. An approximate method for calculating the yield of an intermediate product and reaction time was presented. Consecutive chlorination of p-cresol was carried cut in a stirred tank reactor with a constant gas-liquid contacting area, and the effects of various reaction conditions such as stirring speed and dilution of chlorine with air on the yield of the intermediate product were examined.
It was found that experimental results were well explained by the theory, and the approximate solutions could give good estimations for the yield and the reaction time.抄録全体を表示PDF形式でダウンロード (489K) -
SHINZO OMI, TEIJI UEDA, HIROSHI KUBOTA1969 年 2 巻 2 号 p. 193-198
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーThe change in number of polymer particles formed in the continuous emulsion polymerization of styrene under operational conditions is theoretically analyzed on the basis of the authors'' kinetic data, previously obtained in a batch reactor. The phenomenon of the limit cycle observed in this continuous system is explained. It is noted that the application of "the seeder" to formation of polymer particles will be recommended in practical operations.抄録全体を表示PDF形式でダウンロード (393K) -
AKINORI MATSUURA, JUMEI HARADA, TAKASHI AKEHATA, TAKASHI SHIRAI1969 年 2 巻 2 号 p. 199-203
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーThe rate of the homogeneous reaction of dissolved oxygen and ammonium sulfite in aqueous solutions without catalysts, which has industrial importance in recovery of sulfur dioxide, was studied at 2O, 25 and 3O °C. A polarographic method using a platinum microelectrode was employed for the determination of the oxygen concentration during the course of reaction. Two reactors of different size, which contained O.5 and 4.7 l of solution, respectively, were found to give essentially the same results. The rate of ammonium sulfite oxidation was found to be about one tenth of that of sodium sulfite. The influence of impurities on the rate was found very remarkable. The existence of inhibitors suggested that the reaction might be a radical one. An empirical rate equation, r=k[SO32-]3/2[O2]0[H+]2 in M•min-1 with k= 1.6× 1039exp(-35× 103/RT), was obtained in the experimental range of this work.抄録全体を表示PDF形式でダウンロード (445K) -
KUNIO KATO, NAOTAKE TAKEUCHI, UTARO ITO, HIROSHI KUBOTA1969 年 2 巻 2 号 p. 204-208
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーIn a fixed bed it was ascertained that the rate of catalytic hydrogenation of ethylene on Nicatalyst was approximately expressed by either the first or the second-order equation, respectively, for two different feed compositions of the reactants. The same reaction was carried out in a packed-fluidized bed in which glass spheres or cylindrical wire nets were used as packing materials. The results showed that the conversion of ethylene was correlated solely with Lmf/uf and was independent of the fluidizing condition. The concept of contact efficiency will be used to express the performance of the reaction in a packed fluidized bed.抄録全体を表示PDF形式でダウンロード (353K) -
ISAO KOMASAWA, TOSHISUKE SASAKURA, TSUTAO OTAKE1969 年 2 巻 2 号 p. 208-211
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーThis paper aims to present some experimental studies of reacting and coalescing dispersed phase in a stirred tank reactor.
Reaction conversions were measured for a 2nd order reaction in the dispersed phase between two reactants, K4[Fe(CN)6] and K2S2O8, which entered the reactor in identical fashion in separate dispersed phase streams. The interaction rates were evaluated by comparing the reaction conversions measured with those calculated by Spielman and Levenspiel. Direct measurements of the interaction rates were also carried out by a light transmittance technique at the same condition as that in the measurement of reaction conversion.
It was found that the interaction rates measured by a chemical reaction were in agreement with those measured directly by a physical method within the limits of the experiments. Some problems of the studies are also discussed.抄録全体を表示PDF形式でダウンロード (301K) -
HIROTAKA KQNNO, SHOZABURO SAITO1969 年 2 巻 2 号 p. 211-217
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーThe pneumatic transport of solid particles in both horizontal and vertical pipes was studied using glass beads, copper spheres, millet and grass seeds, having diameters ranging from 0.1 to 1.0mm. It was shown that the additional pressure drop and the particle velocity could be expressed by ΔPs/L=0.057 (ua/√gD)mρa, and us=ua-ut, respectively, in the case of vertical transport.
In vertical transport, the copper spheres and glass beads were found to be densely distributed toward the wall of the pipe whereas higher concentration near the axis was observed for, polystyrene particles.
The velocity profile of the air in the vertical pipe was symmetrical and was not appreciably affected by the addition of the particles. However, in the horizontal pipe, the velocity profile was asymmetric with respect to the pipe axis, and was found to be affected by the particle diameter, density, and the mass flow ratio of the air and the particles.
A simple impulsive model was used to explain the additional pressure drop in horizontal conduits, which was thought to be caused mainly by the collision between the particles and the surface of the pipe wall.抄録全体を表示PDF形式でダウンロード (513K) -
NOBUO MITSUISHI, NOBUYUKI HIRAI1969 年 2 巻 2 号 p. 217-224
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーA modified Reynolds number in the agitation, based on the Ellis and Sutterby models of three rheological constants for non-Newtonian fluids, is defined in the way that the relation between friction factor and Reynolds number in the case of non-Newtonian pipe flow may be the same as that in the case of Newtonian pipe flow.
Introducing this modified Reynolds number, the same correlation of the power requirements can be applied to both experimental results of Newtonian and non-Newtonian fluids with various types of impellers.抄録全体を表示PDF形式でダウンロード (463K) -
SHIN-ICHI MAKISHIMA, TAKASHI SHIRAI1969 年 2 巻 2 号 p. 224-228
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーThe method of approach by "Mero-plastical Dynamics"** has been applied to estimate the shearing stress and inertia force for agitating fluidised beds.
The modified "M"number, HM'', which has been derived from the force balance for agitating fluidised solid beds, is defined as follows,
NM'' =NR/√gLetanφ
which is based on fluidised solid beds, radius of blade and rotational speed, and is quite similar to the Reynolds number for agitating liquids.
The general correlation of the power number, Np, with HM'' for agitating fluidised beds, including the literature data, has been determined experimentally in the following equation similar to those for agitating fixed solid beds and for liquids in tanks.
NP=35NM''-1+50抄録全体を表示PDF形式でダウンロード (402K) -
MINEO IKEDA, HIROAKI MASUDA, MASAHIRO YORIZANE1969 年 2 巻 2 号 p. 229-233
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーA necessary condition for the optimization of multistage counter-current processes is derived in a variant of the discrete maximum principle. This result can be used to optimize a process where the states in any number of stages have direct effects on one another. To illustrate this, a multistage countercurrent extraction process is analyzed; and under a certain performance index such a process is found to have an advantage over the corresponding crosscurrent process.抄録全体を表示PDF形式でダウンロード (382K) -
YASUHIKO ARAI, SHOZABURO SAITO, SIRO MAEDA1969 年 2 巻 2 号 p. 234-235
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーA marked improvement in the prediction of vapor-liquid equilibria for the carbon dioxide-oxygen system was obtained by adopting a new value of C0 in the BWR constants for oxygen which was determined by using saturated density data near the normal boiling point.抄録全体を表示PDF形式でダウンロード (128K) -
RYUICHI AOKI, MASAYUKI SUZUKI1969 年 2 巻 2 号 p. 235-238
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーFrom an analogy of the slip-line analysis of metal plastic working, the slip-lines in the stress field of a powder bed compressed by rough parallel plates were drawn and the normal stresses on the wall were calculated using Coulomb''s equation. These calculated values were compared with the experimental data, and the following conclusions were drawn;
(1) Under the critical stress state, the compressed powders reveal the same behavior of a continuum as far as it is possible to analyze neglecting the bed density.
(2) The powder yield locus for the compress!ve stress field cannot be a Coulomb type straight line, but is a Farley-Valentin type curve convexing to the left.抄録全体を表示PDF形式でダウンロード (272K) -
HIROSHI KUBOTA, YOKO YAMANAKA1969 年 2 巻 2 号 p. 238-240
発行日: 1969/07/31
公開日: 2006/04/26
ジャーナル フリーIt is illustratively shown that the approximate method of estimating the catalyst effectiveness factor, previously presented by the authors, is widely applicable in general cases and also that the nonisothermal effect within the catalyst on the effectiveness factor is minor.抄録全体を表示PDF形式でダウンロード (192K)
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