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51.
The Chao modification of the Redlich-Kister equation for correlating liquid activity coefficients is further modified to facilitate the evaluation of the constants. The determination of liquid activity coefficients at infinite dilutions by means of an ebulliometer with the consideration of vapor hold-up in the condenser is proposed. Both of these proposals are equally applicable to isothermal data and to isobaric data.For the purpose of illustration, vapor-liquid equilibrium data for the binary system acetone-methanol together with the azeotropic point and the liquid activity coefficients at infinite dilutions were determined at 760 Torr. The validity of the correlated data was confirmed with the enthalpies of mixing data at saturation, available in the literature. 相似文献
52.
A new reconstruction method called sampled pattern matching (SPM) was applied to the image reconstruction of an electrical
capacitance computed tomography in powder flow in a vertical pipe for petroleum refinery process. This new method is able
to achieve stable convergence without the use of an empirical value. Experiments were carried out using fluid catalytic cracking
(FCC) catalysts as powder with two air volume flow rates and four powder volume flow rates to measure the capacitance of a
pipe cross section. The SPM method is compared with conventional methods in terms of volume fraction, residual capacitance,
and correlation capacitance. Overall, the SPM method proved superior to conventional methods without any empirical value because
SPM achieves accurate reconstruction by using an objective function that is calculated as the inner product calculation between
the experimental capacitance and the reconstructed image capacitance. 相似文献
53.
Kiyofumi Kurihara Takao Iguchi Toshiaki Banaka Kenji Ochi Kazuo Kojima 《Fluid Phase Equilibria》2001,180(1-2):59-69
The excess molar enthalpies of the systems 2-butanone+water and methanol+hexane which show limited miscibility were measured at 283.15–298.15 K using a flow microcalorimeter. The experimental data were correlated using three local-composition (LC) models (NRTL, modified Wilson and modified EBLCM). These models were also used to predict the liquid–liquid equilibria for both systems with the parameters obtained from the excess enthalpy data. 相似文献
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Hiroyuki Matsuda Yuki Norizuki Miwako Kawai Kiyofumi Kurihara Katsumi Tochigi Kenji Ochi 《Journal of solution chemistry》2014,43(9-10):1561-1573
The object of this study was to measure the liquid–liquid equilibria (LLE) data of binary mixtures containing ionic liquids and citrus essential oil. We investigated linalool as the citrus essential oil, and 1-alkyl-3-methyl-imidazolium bis(trifluoromethanesulfonyl)imide ([C n MIM]+[TFSI]?) as the ionic liquid. Firstly, the experimental apparatus and procedure for the LLE measurement of mixtures containing ionic liquids were verified by measuring the LLE of the binary mixture 1-hexyl-3-methyl-imidazolium bis(trifluoromethanesulfonyl)imide ([C6MIM]+[TFSI]?) + 1-hexanol as a reference test system recommended by Marsh et al. (Pure Appl Chem 81:781–789, 2009). Next, the LLE data for IL + linalool were obtained, and the LLE data of two binary mixtures 1-butyl-3-methyl-imidazolium bis(trifluoromethanesulfonyl)imide ([C4MIM]+[TFSI]?) or [C6MIM]+[TFSI]? + linalool were determined. The experimental LLE data were satisfactorily represented by the non-random two-liquid model. 相似文献
56.
Katsuhito Miyamoto Noboru Kubodera Eigoro Murayama Kiyoshige Ochi Takashi Mori Isao Matsunaga 《合成通讯》2013,43(5):513-521
The conversion of lithocholic acid (1) into 25-hydroxycholesterol (10) via methyl 3β-hydroxy-5-cholenate (6) is described. 相似文献
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Kenji Kinoshita Yasuo Shida Chiseko Sakuma Mutsuo Ishizaki Koichi Kiso Osamu Shikino Hiroyasu Ito Masatoshi Morita Takafumi Ochi Toshikazu Kaise 《应用有机金属化学》2005,19(2):287-293
Diphenylarsinic acid (DPAA) and phenylarsonic acid (PAA), which were degradation products of organoarsenic chemical warfare agents used as sternutatory gas, were detected in the well water at Kamisu, Ibaraki Prefecture, Japan. The standard material of DPAA was synthesized with aqueous arsenic acid and phenylhydrazine in order to determine organic arsenic compounds in well water. The DPAA showed a protonated ion at m/z 263 [M + H]+ and a loss of H2O ion at m/z 245 [M + H ? H2O]+ from protonated ion by the electrospray ionization time‐of‐flight mass spectrometry. The quantitative analysis of DPAA and PAA was performed by high‐performance liquid chromatography inductively coupled plasma mass spectrometry and the system worked well for limpid liquid samples such as well water. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
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