Ichihara, Japan
Ichihara, Japan

Time filter

Source Type

Freitag J.,Nippon Refine Co. | Kosuge H.,Nippon Refine Co. | Schmelzer J.P.,FH Dresden | Kato S.,Tokyo Metroplitan University | Kato S.,TC Lines Co.
Journal of Chemical Thermodynamics | Year: 2014

A new static cell vapor phase manual sampling (SCVMS1) method is used for the simple measurement of constant temperature x, y (vapor + liquid) equilibria (VLE). The method was applied to the VLE measurements of the (methanol + water) binary at T/K = (283.2, 298.2, 308.2 and 322.9), asymmetric (acetone + 1-butanol) binary at T/K = (283.2, 295.2, 308.2 and 324.2) and two-liquid phase forming azeotropic (water + 1-butanol) binary at T/K = (283.2 and 298.2). The accuracy of the experimental data was approved by a data consistency test, that is, an empirical plot of the polarity exclusion factor, β, vs. the system pressure, P. The SCVMS data are accurate, because the VLE data converge to the same lnβ vs. lnP straight line determined from conventional distillation-still method and a headspace gas chromatography method. © 2014 Elsevier Ltd. All rights reserved.


Kato S.,Tokyo Metroplitan University | Kato S.,TC Lines Co | Gostomski P.,University of Canterbury | Oda A.,Nippon Refine Co | And 3 more authors.
Fluid Phase Equilibria | Year: 2013

Binary liquid-liquid equilibrium (LLE) data are correlated using thermodynamic consistency (TC) lines. Of the 283 binaries investigated, 257 have correlation errors less than 3%, providing an average of 0.52%. The average correlation error of the 283 binaries was 2.2%. The TC lines can satisfactorily predict solubilities from near the lower to the upper critical solution temperatures. Furthermore, the TC lines determined from the low-pressure P, x and T, x data can satisfactorily predict the VLE relationships. © 2013 Elsevier B.V.


Tatemoto Y.,University of Shizuoka | Michikoshi T.,University of Shizuoka | Higashino T.,University of Shizuoka | Maeda S.,University of Shizuoka | And 2 more authors.
Chemical Engineering and Technology | Year: 2012

A solid-liquid fluidized bed of inert particles can be used to separate pure objects from a mixture. Pieces of plastic sheet were selected as the objects to be separated. To estimate the separation characteristics, the behavior of pieces of plastic sheet in the bed was examined experimentally. Slow stirring was used to improve the fluidization state of the bed. The object size and the volume ratio of objects to inert particles were varied. The use of stirring of the bed was effective in improving the fluidization state of the bed, and the objects, which sank in the bed without stirring, moved from the bottom to the upper portion of the bed at a certain liquid velocity. This liquid velocity increases with decreasing object size, and it also increases as the volume ratio of objects to inert particles in the bed increases. When the volume ratio of objects to inert particles is too high, the objects are distributed throughout the entire bed, regardless of the liquid velocity. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Tatemoto Y.,University of Shizuoka | Higashino T.,University of Shizuoka | Suzuki Y.,University of Shizuoka | Michikoshi T.,University of Shizuoka | And 2 more authors.
Chemical Engineering and Technology | Year: 2011

A liquid-fluidized bed of inert particles was used to separate a pure object from a mixture. One (binary solid-liquid-fluidized bed) or two (tertiary solid-liquid-fluidized bed) types of objects with relatively large-sized particles were immersed in an inert-particle bed, and the bed behavior was observed for different liquid velocities. The void fraction and apparent density of the inert-particle suspension were predicted by considering the effect of the change in object position for different liquid velocities. The prediction method, which considers the change in the minimum fluidization velocity, accurately expressed the changes in the void fraction and the apparent density of the bed with the position of the objects in the bed. Using this method, the liquid velocity required to separate a certain kind of object from a mixture can be predicted. A liquid-fluidized bed of inert particles was used to separate a pure object from a mixture. A prediction method for the bed behavior with the position of the object(s) in the bed was suggested. Using this method, the liquid velocity required to separate a certain kind of object from the mixture can be predicted. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Kato S.,Tokyo Metroplitan University | Freitag J.,Nippon Refine CO. | Gostomski P.,University of Canterbury | Noritomi H.,Tokyo Metroplitan University | And 3 more authors.
Solvent Extraction Research and Development | Year: 2012

P, x data for the thiophene + [bmim][BF4],+ [bmim][PF6] binaries are correlated using the NRTL equation. It is shown that infinite dilution activity coefficients, γiinfin; , determined from the VLE data are different from experimental γiinfin; values in the thiophene + [bmim][BF4] binary; high-performance regeneration of ionic liquids requires VLE data at infinite dilution.


Iwase A.,Nagoya City University | Ueda A.,Nagoya City University | Ueda A.,Nippon Refine Co. | Kuwae A.,Nagoya City University | And 2 more authors.
Journal of Molecular Structure | Year: 2013

Fourier transform (FT) and resonance Raman spectra of 1-methyl-4-(4- diethylaminophenylazo)-pyridinium iodide (MDP) and its four deuterated and three 15N stable isotopic compounds have been measured in neutral and acidic aqueous solutions, and the molecular structures have been discussed on the basis of detailed vibrational assignments using the isotope shifts. No Raman band due to the azo N@N group is observed in a neutral aqueous solution and also in the solid state of MDP; therefore, this finding suggests that double bond character of the azo group becomes weak and, consequently, the structures of both benzene and pyridinium rings are close to that of a quinoid. The Raman and the 15N NMR spectra indicate that the Nb of the azo group is protonated in an acidic solution of MDP. Comparison of the spectra of the two solutions suggests that the benzene ring has more quinoid character in the acidic than in the neutral solution. The chromophore structures have been revealed in each of the neutral (purple) and the acidic (yellow) solution. © 2013 Elsevier B.V. All rights reserved.


Yasuda K.,Nagoya University | Wang Y.,Nagoya University | Haneda K.,Nagoya University | Naito T.,Nagoya University | And 3 more authors.
Canadian Journal of Chemical Engineering | Year: 2010

Micro-bubbles were dispersed in the bubble column with draft tube, and the length and diameter of draft tube were changed. The flow characteristics in air-water system were measured. Ozone gas and methylene-blue aqueous solution were used, and the decomposition performance was examined. With increasing draft tube length, both the gas holdup and liquid velocity in the annular section increased. When the diameter ratio of draft tube to column was about 0.5, both the gas holdup and liquid circulation flow rate had maxima. For the decomposition by using ozone, the installation of draft tube enhanced the mass transfer and decomposition performance. © 2010 Canadian Society for Chemical Engineering.


Kato S.,Tokyo Metroplitan University | Freitag J.,Nippon Refine Co. | Gostomski P.,University of Canterbury
Fluid Phase Equilibria | Year: 2013

Infinite dilution partial molar excess entropy-enthalpy compensation for polar solutes in an ionic liquid (IL) is investigated using the literature data of infinite dilution activity coefficient, ln γ1∞. Entropy-enthalpy compensation holds for the polar solutes, such as thiophene and CO2, and non-polar solutes, such as heptane and toluene. For the water+IL binaries, a converged linear relationship between infinite dilution partial molar excess entropy and enthalpy holds. Using the compensation rule, it is shown that, for the efficient removal of thiophene and CO2 from non-polar solutes with IL solvents, ILs having weaker molecular interactions with thiophene and CO2 are advantageous, because the entropy terms control the ln γ1∞ values. © 2012 Elsevier B.V.


Provided is an NMP recovery system 1 for causing NMP-containing gas to contact NMP-absorbing water, including: fillers (10A) to (10D) that are permeable to the water and hold the water, wherein the permeated water moves according to gravity to flow out from the fillers; an NMP-containing gas distribution unit (30) for distributing the NMP-containing gas so as to cause the NMP-containing gas to contact the water held by the fillers (10A) to (10D); and a water distribution unit (40) for distributing the water so as to make the water permeate through the fillers (10A) to (10D). In the fillers (10A) to (10D), the NMP-containing gas is made to contact the NMP-absorbing water. Accordingly, NMP in the NMP-containing gas is absorbed in the water, so that the NMP is separated from the NMP-containing gas.


Provided is an NMP recovery system 1 for causing NMP-containing gas to contact NMP-absorbing water, including: fillers (10A) to (10D) that are permeable to the water and hold the water, wherein the permeated water moves according to gravity to flow out from the fillers; an NMP-containing gas distribution unit (30) for distributing the NMP-containing gas so as to cause the NMP-containing gas to contact the water held by the fillers (10A) to (10D); and a water distribution unit (40) for distributing the water so as to make the water permeate through the fillers (10A) to (10D). In the fillers (10A) to (10D), the NMP-containing gas is made to contact the NMP-absorbing water. Accordingly, NMP in the NMP-containing gas is absorbed in the water, so that the NMP is separated from the NMP-containing gas.

Loading Nippon Refine CO. collaborators
Loading Nippon Refine CO. collaborators