The Experts below are selected from a list of 210 Experts worldwide ranked by ideXlab platform
Jurgen Schmelzer - One of the best experts on this subject based on the ideXlab platform.
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Measurement and Prediction of Vapor–Liquid Equilibria in Ternary Systems Containing an Organic Component, Cyclohexylamine, and Cyclohexanol
Journal of Chemical & Engineering Data, 2017Co-Authors: Mandy Klauck, Jurgen Schmelzer, Thomas Hähnel, Sandra Richter, Grit KaliesAbstract:The isothermal vapor–liquid equilibrium data are presented for three ternary systems: octane + Cyclohexylamine + cyclohexanol, cyclohexane + Cyclohexylamine + cyclohexanol, and toluene + Cyclohexylamine + cyclohexanol. The experimental data were determined by the dynamic method in a modified Rock and Sieg circulation still at two different temperatures and reduced pressures. The experimental results were compared with the predictions from both UNIQUAC and NRTL activity coefficient models and the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS).
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vle and lle in ternary systems of two associating components water aniline and Cyclohexylamine and a hydrocarbon cyclohexane or methylcyclohexane
Fluid Phase Equilibria, 2014Co-Authors: Mandy Klauck, Grit Kalies, Rico Silbermann, Robert Metasch, Tatjana Jasinowski, Jurgen SchmelzerAbstract:Abstract The isothermal vapour–liquid equilibria (VLE) of the five ternary mixtures water + cyclohexane + aniline (A), water + cyclohexane + Cyclohexylamine (B), water + methylcyclohexane + aniline (D), water + methylcyclohexane + Cyclohexylamine (E), and methylcyclohexane + aniline + CHA (F) with industrial relevance were determined at temperatures between 333.15 K and 363.15 K at reduced pressures. Additionally, the liquid–liquid equilibria (LLE) of the four ternary systems (B), (D), (E), and cyclohexane + aniline + Cyclohexylamine (C) were determined at temperatures between 298.15 K and 333.15 K at atmospheric pressure. In total, 185 LLE and 121 VLE measurement points are presented and discussed. The experimental results were compared with the predictions of the activity coefficient models UNIQUAC and NRTL, and of the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS) based on binary interaction parameters. In order to estimate the binary parameters required for calculation, the VLE of the binary cyclohexane + aniline (G) system was measured at 333.15 K and 353.15 K at reduced pressures. Furthermore, the prediction results of the group contribution method modified UNIFAC (Dortmund) are included. Interaction parameters of new amine group at cycloaliphatic hydrocarbon have been used in the calculation.
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liquid liquid liquid equilibria in ternary systems of water Cyclohexylamine aromatic hydrocarbon toluene or propylbenzene or aliphatic hydrocarbon heptane or octane
Journal of Chemical & Engineering Data, 2006Co-Authors: Mandy Klauck, And Andreas Grenner, Jurgen SchmelzerAbstract:Liquid−liquid equilibria and liquid−liquid−liquid equilibria were determined for (water + Cyclohexylamine + toluene), (water + Cyclohexylamine + propylbenzene), (water + Cyclohexylamine + heptane), and (water + Cyclohexylamine + octane) at temperatures of (298.15, 303.15, and 333.15) K at atmospheric pressure by photometric turbidity titration. The composition of conjugate phases was determined by gas−liquid chromatography or potentiometric titration and Karl Fischer titration. All systems show type I behavior since there is only one binary pair of partial miscible liquids. Surprisingly, the systems (water + Cyclohexylamine + heptane) and (water + Cyclohexylamine + octane) have a three-phase region in a limited temperature range. The data were predicted with the NRTL and the UNIQUAC models in comparison to the Elliott−Suresh−Donohue equation of state based on binary interaction parameters only.
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activity coefficients at infinite dilution of cylcohexylamine octane toluene ethylbenzene or aniline and excess molar volumes in binary mixtures of Cyclohexylamine heptane octane nonane decane undecane aniline or water
Journal of Chemical & Engineering Data, 2006Co-Authors: Andreas Grenner, Mandy Klauck, And Madeleine Kramer, Jurgen SchmelzerAbstract:The differential ebulliometry method was used to measure activity coefficients at infinite dilution for Cyclohexylamine with octane, toluene, ethylbenzene, and aniline in a temperature range from (353 to 403) K. NRTL and UNIQUAC parameters have been determined with these data and with vapor−liquid equilibrium data (VLE) from the literature. In this context P−x−y data were measured for the system cylcohexylamine + toluene at (333.15 and 363.15) K. Excess molar volumes were obtained by density measurements of binary mixtures of Cyclohexylamine + heptane, octane, nonane, decane, undecane, aniline, and water at 303.15 K under atmospheric pressure. The excess molar volumes were fitted to the Redlich−Kister polynomial equation.
Mandy Klauck - One of the best experts on this subject based on the ideXlab platform.
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Measurement and Prediction of Vapor–Liquid Equilibria in Ternary Systems Containing an Organic Component, Cyclohexylamine, and Cyclohexanol
Journal of Chemical & Engineering Data, 2017Co-Authors: Mandy Klauck, Jurgen Schmelzer, Thomas Hähnel, Sandra Richter, Grit KaliesAbstract:The isothermal vapor–liquid equilibrium data are presented for three ternary systems: octane + Cyclohexylamine + cyclohexanol, cyclohexane + Cyclohexylamine + cyclohexanol, and toluene + Cyclohexylamine + cyclohexanol. The experimental data were determined by the dynamic method in a modified Rock and Sieg circulation still at two different temperatures and reduced pressures. The experimental results were compared with the predictions from both UNIQUAC and NRTL activity coefficient models and the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS).
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vle and lle in ternary systems of two associating components water aniline and Cyclohexylamine and a hydrocarbon cyclohexane or methylcyclohexane
Fluid Phase Equilibria, 2014Co-Authors: Mandy Klauck, Grit Kalies, Rico Silbermann, Robert Metasch, Tatjana Jasinowski, Jurgen SchmelzerAbstract:Abstract The isothermal vapour–liquid equilibria (VLE) of the five ternary mixtures water + cyclohexane + aniline (A), water + cyclohexane + Cyclohexylamine (B), water + methylcyclohexane + aniline (D), water + methylcyclohexane + Cyclohexylamine (E), and methylcyclohexane + aniline + CHA (F) with industrial relevance were determined at temperatures between 333.15 K and 363.15 K at reduced pressures. Additionally, the liquid–liquid equilibria (LLE) of the four ternary systems (B), (D), (E), and cyclohexane + aniline + Cyclohexylamine (C) were determined at temperatures between 298.15 K and 333.15 K at atmospheric pressure. In total, 185 LLE and 121 VLE measurement points are presented and discussed. The experimental results were compared with the predictions of the activity coefficient models UNIQUAC and NRTL, and of the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS) based on binary interaction parameters. In order to estimate the binary parameters required for calculation, the VLE of the binary cyclohexane + aniline (G) system was measured at 333.15 K and 353.15 K at reduced pressures. Furthermore, the prediction results of the group contribution method modified UNIFAC (Dortmund) are included. Interaction parameters of new amine group at cycloaliphatic hydrocarbon have been used in the calculation.
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Vapor–liquid equilibria in ternary systems of associating components (water, aniline, Cyclohexylamine) and hydrocarbons (octane or toluene)
Fluid Phase Equilibria, 2007Co-Authors: Mandy Klauck, Andreas Grenner, René Meinhardt, Jiirgen SchmelzerAbstract:Abstract The vapor–liquid equilibria in the seven ternary systems water + toluene + aniline, water + octane + aniline, water + toluene + Cyclohexylamine, water + octane + Cyclohexylamine, toluene + aniline + Cyclohexylamine, octane + aniline + Cyclohexylamine, and water + Cyclohexylamine + aniline were determined at 333.15 and 363.15 K at reduced pressure. The experimental results were compared with the predictions of the activity coefficient models UNIQUAC and NRTL and the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS).
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liquid liquid liquid equilibria in ternary systems of water Cyclohexylamine aromatic hydrocarbon toluene or propylbenzene or aliphatic hydrocarbon heptane or octane
Journal of Chemical & Engineering Data, 2006Co-Authors: Mandy Klauck, And Andreas Grenner, Jurgen SchmelzerAbstract:Liquid−liquid equilibria and liquid−liquid−liquid equilibria were determined for (water + Cyclohexylamine + toluene), (water + Cyclohexylamine + propylbenzene), (water + Cyclohexylamine + heptane), and (water + Cyclohexylamine + octane) at temperatures of (298.15, 303.15, and 333.15) K at atmospheric pressure by photometric turbidity titration. The composition of conjugate phases was determined by gas−liquid chromatography or potentiometric titration and Karl Fischer titration. All systems show type I behavior since there is only one binary pair of partial miscible liquids. Surprisingly, the systems (water + Cyclohexylamine + heptane) and (water + Cyclohexylamine + octane) have a three-phase region in a limited temperature range. The data were predicted with the NRTL and the UNIQUAC models in comparison to the Elliott−Suresh−Donohue equation of state based on binary interaction parameters only.
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activity coefficients at infinite dilution of cylcohexylamine octane toluene ethylbenzene or aniline and excess molar volumes in binary mixtures of Cyclohexylamine heptane octane nonane decane undecane aniline or water
Journal of Chemical & Engineering Data, 2006Co-Authors: Andreas Grenner, Mandy Klauck, And Madeleine Kramer, Jurgen SchmelzerAbstract:The differential ebulliometry method was used to measure activity coefficients at infinite dilution for Cyclohexylamine with octane, toluene, ethylbenzene, and aniline in a temperature range from (353 to 403) K. NRTL and UNIQUAC parameters have been determined with these data and with vapor−liquid equilibrium data (VLE) from the literature. In this context P−x−y data were measured for the system cylcohexylamine + toluene at (333.15 and 363.15) K. Excess molar volumes were obtained by density measurements of binary mixtures of Cyclohexylamine + heptane, octane, nonane, decane, undecane, aniline, and water at 303.15 K under atmospheric pressure. The excess molar volumes were fitted to the Redlich−Kister polynomial equation.
Qiuhong Ai - One of the best experts on this subject based on the ideXlab platform.
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highly selective one step catalytic amination of cyclohexene to Cyclohexylamine over hzsm 5
Catalysis Communications, 2019Co-Authors: Jian Jian, Fangfang Zhao, Qiuhong AiAbstract:Abstract An atom-economic and moderate approach for highly selective one-step catalytic amination of cyclohexene to Cyclohexylamine using HZSM-5 with a Si/Al ratio of 38 has been successfully developed in this work. Results showed that 4.3% cyclohexene conversion with 100% selectivity to Cyclohexylamine was achieved under optimal reaction conditions. The acid strength of the catalyst played an extraordinarily important role in the present amination reaction. The possible catalytic amination mechanism of cyclohexene with NH3 using HZSM-5 has also been suggested. This approach is a promising process for the preparation of Cyclohexylamine from one-step amination of cyclohexene employing commercialized HZSM-5 as an effective and regenerable catalyst under relatively mild conditions.
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supported tio2 mcm 41 as an efficient and eco friendly catalyst for highly selective preparation of cyclohexanone oxime from solvent free liquid phase oxidation of Cyclohexylamine with molecular oxygen
Applied Catalysis A-general, 2018Co-Authors: Jinyuan Song, Renjie Deng, Fangfang Zhao, Qiuhong AiAbstract:Abstract A green and efficient approach for solvent-free selective catalytic oxidation of Cyclohexylamine to cyclohexanone oxime in liquid phase has been developed. The results showed that the supported 30%TiO2/MCM-41 as efficient and eco-friendly catalyst gave 78.4% of Cyclohexylamine conversion with 89.1% of selectivity to cyclohexanone oxime. It has been demonstrated that the catalytic active sites are the surface titanium hydroxyl groups of catalyst. Moreover, the present catalyst can be easily separated, recycled, regenerated and reused. The probable catalytic reaction mechanism of Cyclohexylamine with molecular oxygen over supported TiO2/MCM-41 was suggested. This work affords a new and environmentally friendly route for the synthesis of cyclohexanone oxime, and has important industrial application prospects.
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mesoporous silica gel as an effective and eco friendly catalyst for highly selective preparation of cyclohexanone oxime by vapor phase oxidation of Cyclohexylamine with air
Journal of Catalysis, 2016Co-Authors: Jian Jian, Fangfang Zhao, Wenzhou Zhong, Qiuhong AiAbstract:Abstract A simple and environmentally benign approach to highly selective preparation of cyclohexanone oxime by vapor phase catalytic oxidation of Cyclohexylamine with air over mesoporous silica gel under atmospheric pressure has been successfully developed in this work. The results demonstrate that the nonmetallic mesoporous silica gel is an effective and eco-friendly catalyst for the vapor phase selective oxidation of Cyclohexylamine to cyclohexanone oxime and the surface silicon hydroxyl groups as active sites are responsible for the excellent catalytic performance of silica gel. The present silica gel catalyst has advantages of low cost, long-time stable reactivity, easy regeneration, and reusability. This method employing inexpensive mesoporous silica gel as catalyst and air as green terminal oxidant under facile conditions is a promising process and has the potential to enable sustainable production of cyclohexanone oxime from the selective oxidation of Cyclohexylamine with air in industrial applications.
Andreas Grenner - One of the best experts on this subject based on the ideXlab platform.
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Vapor–liquid equilibria in ternary systems of associating components (water, aniline, Cyclohexylamine) and hydrocarbons (octane or toluene)
Fluid Phase Equilibria, 2007Co-Authors: Mandy Klauck, Andreas Grenner, René Meinhardt, Jiirgen SchmelzerAbstract:Abstract The vapor–liquid equilibria in the seven ternary systems water + toluene + aniline, water + octane + aniline, water + toluene + Cyclohexylamine, water + octane + Cyclohexylamine, toluene + aniline + Cyclohexylamine, octane + aniline + Cyclohexylamine, and water + Cyclohexylamine + aniline were determined at 333.15 and 363.15 K at reduced pressure. The experimental results were compared with the predictions of the activity coefficient models UNIQUAC and NRTL and the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS).
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activity coefficients at infinite dilution of cylcohexylamine octane toluene ethylbenzene or aniline and excess molar volumes in binary mixtures of Cyclohexylamine heptane octane nonane decane undecane aniline or water
Journal of Chemical & Engineering Data, 2006Co-Authors: Andreas Grenner, Mandy Klauck, And Madeleine Kramer, Jurgen SchmelzerAbstract:The differential ebulliometry method was used to measure activity coefficients at infinite dilution for Cyclohexylamine with octane, toluene, ethylbenzene, and aniline in a temperature range from (353 to 403) K. NRTL and UNIQUAC parameters have been determined with these data and with vapor−liquid equilibrium data (VLE) from the literature. In this context P−x−y data were measured for the system cylcohexylamine + toluene at (333.15 and 363.15) K. Excess molar volumes were obtained by density measurements of binary mixtures of Cyclohexylamine + heptane, octane, nonane, decane, undecane, aniline, and water at 303.15 K under atmospheric pressure. The excess molar volumes were fitted to the Redlich−Kister polynomial equation.
Grit Kalies - One of the best experts on this subject based on the ideXlab platform.
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Measurement and Prediction of Vapor–Liquid Equilibria in Ternary Systems Containing an Organic Component, Cyclohexylamine, and Cyclohexanol
Journal of Chemical & Engineering Data, 2017Co-Authors: Mandy Klauck, Jurgen Schmelzer, Thomas Hähnel, Sandra Richter, Grit KaliesAbstract:The isothermal vapor–liquid equilibrium data are presented for three ternary systems: octane + Cyclohexylamine + cyclohexanol, cyclohexane + Cyclohexylamine + cyclohexanol, and toluene + Cyclohexylamine + cyclohexanol. The experimental data were determined by the dynamic method in a modified Rock and Sieg circulation still at two different temperatures and reduced pressures. The experimental results were compared with the predictions from both UNIQUAC and NRTL activity coefficient models and the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS).
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vle and lle in ternary systems of two associating components water aniline and Cyclohexylamine and a hydrocarbon cyclohexane or methylcyclohexane
Fluid Phase Equilibria, 2014Co-Authors: Mandy Klauck, Grit Kalies, Rico Silbermann, Robert Metasch, Tatjana Jasinowski, Jurgen SchmelzerAbstract:Abstract The isothermal vapour–liquid equilibria (VLE) of the five ternary mixtures water + cyclohexane + aniline (A), water + cyclohexane + Cyclohexylamine (B), water + methylcyclohexane + aniline (D), water + methylcyclohexane + Cyclohexylamine (E), and methylcyclohexane + aniline + CHA (F) with industrial relevance were determined at temperatures between 333.15 K and 363.15 K at reduced pressures. Additionally, the liquid–liquid equilibria (LLE) of the four ternary systems (B), (D), (E), and cyclohexane + aniline + Cyclohexylamine (C) were determined at temperatures between 298.15 K and 333.15 K at atmospheric pressure. In total, 185 LLE and 121 VLE measurement points are presented and discussed. The experimental results were compared with the predictions of the activity coefficient models UNIQUAC and NRTL, and of the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS) based on binary interaction parameters. In order to estimate the binary parameters required for calculation, the VLE of the binary cyclohexane + aniline (G) system was measured at 333.15 K and 353.15 K at reduced pressures. Furthermore, the prediction results of the group contribution method modified UNIFAC (Dortmund) are included. Interaction parameters of new amine group at cycloaliphatic hydrocarbon have been used in the calculation.
