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Jiazhen Yang - One of the best experts on this subject based on the ideXlab platform.

  • Studies on the properties of Ionic Liquid EMIInCl4
    Fluid Phase Equilibria, 2005
    Co-Authors: Shuliang Zang, Ming Huang, Bin Wang, Qingguo Zhang, Jiazhen Yang
    Abstract:

    An Ionic Liquid (IL) was prepared by directly mixing InCl3 and 1-methyl-3-butylimidazolium chloride(BMIC) with molar ratio 1:1 under dry argon atmosphere. The densities, and surface tension of pure IL were determined at temperature range of (278.15 to 343.15±0.1K). The properties for Ionic Liquid based on group III were discussed using Glasser’s theory. The standard entropy, the surface energy and the crystal energy of Ionic Liquid were calculated, respectively. The crystal energy of Ionic Liquid is much lower than Ionic solid and this is the underlying reason for forming Ionic Liquid at room temperature. In addition, a new theoretical model of IL, that is interstice model, was applied to calculate the thermal expansion coefficient of BMIInCl4. The order of magnitude for the thermal expansion coefficient, a, calculated by the theoretical model is in good agreement with experimental value. The result shows that there is much reasonableness for the interstice model of Ionic Liquid.

  • studies on mixture of Ionic Liquid emigacl4 and emic
    Fluid Phase Equilibria, 2005
    Co-Authors: Jiazhen Yang, Weiguo Xu, Qingguo Zhang, Shuliang Zang
    Abstract:

    Abstract The densities of Ionic Liquid compound EMIGaCl 4 and its mixtures with EMIC were measured by pycnometry in the temperature range from 308.15 to 343.15 K. The values of apparent molar volume of the mixture, partial molar volume and apparent molar expansibilities of EMIC were determined. Both Raman scattering and ab initio calculations were performed. All results show that GaCl 4 − is sole anion in Ionic Liquid compound EMIGaCl 4 and is predominant one in the mixture composed of EMIC and Ionic Liquid compound EMIGaCl 4 .

  • studies on room temperature Ionic Liquid incl3 emic
    Fluid Phase Equilibria, 2003
    Co-Authors: Jiazhen Yang, Peng Tian, Lingling He, Weiguo Xu
    Abstract:

    Abstract A new room temperature Ionic Liquid (RTIL) has been prepared by directly mixing InCl3 and 1-ethyl-3-methylimidazolium chloride (EMIC) under dry nitrogen atmosphere. The phase diagram of the binary system InCl3–EMIC was determined by DSC. Both Raman scattering and ab inito calculations indicate that InCl4− is the predominant indium-containing species in the Ionic Liquid. And it was further confirmed by NMR experiments.

  • Studies on room temperature Ionic Liquid InCl3–EMIC
    Fluid Phase Equilibria, 2003
    Co-Authors: Jiazhen Yang, Peng Tian, Lingling He, Weiguo Xu
    Abstract:

    Abstract A new room temperature Ionic Liquid (RTIL) has been prepared by directly mixing InCl3 and 1-ethyl-3-methylimidazolium chloride (EMIC) under dry nitrogen atmosphere. The phase diagram of the binary system InCl3–EMIC was determined by DSC. Both Raman scattering and ab inito calculations indicate that InCl4− is the predominant indium-containing species in the Ionic Liquid. And it was further confirmed by NMR experiments.

Weiguo Xu - One of the best experts on this subject based on the ideXlab platform.

  • studies on mixture of Ionic Liquid emigacl4 and emic
    Fluid Phase Equilibria, 2005
    Co-Authors: Jiazhen Yang, Weiguo Xu, Qingguo Zhang, Shuliang Zang
    Abstract:

    Abstract The densities of Ionic Liquid compound EMIGaCl 4 and its mixtures with EMIC were measured by pycnometry in the temperature range from 308.15 to 343.15 K. The values of apparent molar volume of the mixture, partial molar volume and apparent molar expansibilities of EMIC were determined. Both Raman scattering and ab initio calculations were performed. All results show that GaCl 4 − is sole anion in Ionic Liquid compound EMIGaCl 4 and is predominant one in the mixture composed of EMIC and Ionic Liquid compound EMIGaCl 4 .

  • studies on room temperature Ionic Liquid incl3 emic
    Fluid Phase Equilibria, 2003
    Co-Authors: Jiazhen Yang, Peng Tian, Lingling He, Weiguo Xu
    Abstract:

    Abstract A new room temperature Ionic Liquid (RTIL) has been prepared by directly mixing InCl3 and 1-ethyl-3-methylimidazolium chloride (EMIC) under dry nitrogen atmosphere. The phase diagram of the binary system InCl3–EMIC was determined by DSC. Both Raman scattering and ab inito calculations indicate that InCl4− is the predominant indium-containing species in the Ionic Liquid. And it was further confirmed by NMR experiments.

  • Studies on room temperature Ionic Liquid InCl3–EMIC
    Fluid Phase Equilibria, 2003
    Co-Authors: Jiazhen Yang, Peng Tian, Lingling He, Weiguo Xu
    Abstract:

    Abstract A new room temperature Ionic Liquid (RTIL) has been prepared by directly mixing InCl3 and 1-ethyl-3-methylimidazolium chloride (EMIC) under dry nitrogen atmosphere. The phase diagram of the binary system InCl3–EMIC was determined by DSC. Both Raman scattering and ab inito calculations indicate that InCl4− is the predominant indium-containing species in the Ionic Liquid. And it was further confirmed by NMR experiments.

Christian P. Mehnert - One of the best experts on this subject based on the ideXlab platform.

  • Supported Ionic Liquid catalysis
    Chemistry - A European Journal, 2005
    Co-Authors: Christian P. Mehnert
    Abstract:

    Supported Ionic Liquid catalysis is a concept which combines the advantages of Ionic Liquids with those of heterogeneous support materials. The viability of this concept has been confirmed by several studies which have successfully confined various Ionic phases to the surface of support materials and explored their potential catalytic applications. Although the majority of the evaluated supports were silica based, several studies focused on polymeric materials including membranes. The preparation of these materials was achieved by using two different immobilization approaches. The first approach involves the covalent attachment of Ionic Liquids to the support surface whereas the second simply deposits the Ionic Liquid phases containing catalytically active species on the surface of the support. Herein recent advances made in this area are described.

  • Supported Ionic Liquid catalysis - A new concept for homogeneous hydroformylation catalysis
    Journal of the American Chemical Society, 2002
    Co-Authors: Christian P. Mehnert, Nicholas C. Dispenziere, Raymond A Cook, Mobae Afeworki
    Abstract:

    The new concept of supported Ionic Liquid catalysis involves the surface of a support material that is modified with a monolayer of covalently attached Ionic Liquid fragments. Treatment of this surface with additional Ionic Liquid results in the formation of a multiple layer of free Ionic Liquid on the support. These layers serve as the reaction phase in which a homogeneous hydroformylation catalyst was dissolved. Supported Ionic Liquid catalysis combines the advantages of Ionic Liquid media with solid support materials which enables the application of fixed-bed technology and the usage of significantly reduced amounts of the Ionic Liquid. The concept of supported Ionic Liquid catalysis has successfully been used for hydroformylation reactions and can be further expanded into other areas of catalysis.

Tom Welton - One of the best experts on this subject based on the ideXlab platform.

  • Ionic Liquid pretreatment of lignocellulosic biomass with Ionic Liquid-water mixtures
    Green Chemistry, 2011
    Co-Authors: A Brandt, Trang Q. To, Thomas Welton, Michael J. Ray, David J Leak, Richard J. Murphy, Tom Welton
    Abstract:

    Ground lignocellulosic biomass (Miscanthus giganteus, pine (Pinus sylvestris) and willow (Salix viminalis)) was pretreated with Ionic Liquid-water mixtures of 1-butyl-3-methylimidazolium methyl sulfate and 1-butyl-3-methylimidazolium hydrogen sulfate. A solid fraction enriched in cellulose was recovered, which was subjected to enzymatic hydrolysis. Up to 90% of the glucose and 25% of the hemicellulose contained in the original biomass were released by the combined Ionic Liquid pretreatment and the enzymatic hydrolysis. After the pretreatment, the Ionic Liquid liquor contained the majority of the lignin and the hemicellulose. The lignin portion was partially precipitated from the liquor upon dilution with water. The amount of hemicellulose monomers in the Ionic Liquid liquor and their conversion into furfurals was also examined. The performance of Ionic Liquid-water mixtures containing 1,3-dialkylimidazolium Ionic Liquids with acetate, methanesulfonate, trifluoromethanesulfonate and chloride anions was investigated. The applicability of the Ionic Liquid 1-butylimidazolium hydrogensulfate for lignocellulose pretreatment was also examined. It was found that Ionic Liquid liquors containing methyl sulfate, hydrogen sulfate and methanesulfonate anions were most effective in terms of lignin/cellulose fractionation and enhancement of cellulose digestibility.

  • Ionic Liquid pretreatment of lignocellulosic biomass with Ionic Liquid–water mixtures
    Green Chemistry, 2011
    Co-Authors: A Brandt, Michael J. Ray, David J Leak, Richard J. Murphy, Tom Welton
    Abstract:

    Ground lignocellulosic biomass (Miscanthus giganteus, pine (Pinus sylvestris) and willow (Salix viminalis)) was pretreated with Ionic Liquid–water mixtures of 1-butyl-3-methylimidazolium methyl sulfate and 1-butyl-3-methylimidazolium hydrogen sulfate. A solid fraction enriched in cellulose was recovered, which was subjected to enzymatic hydrolysis. Up to 90% of the glucose and 25% of the hemicellulose contained in the original biomass were released by the combined Ionic Liquid pretreatment and the enzymatic hydrolysis. After the pretreatment, the Ionic Liquid liquor contained the majority of the lignin and the hemicellulose. The lignin portion was partially precipitated from the liquor upon dilution with water. The amount of hemicellulose monomers in the Ionic Liquid liquor and their conversion into furfurals was also examined. The performance of Ionic Liquid–water mixtures containing 1,3-dialkylimidazolium Ionic Liquids with acetate, methanesulfonate, trifluoromethanesulfonate and chloride anions was investigated. The applicability of the Ionic Liquid 1-butylimidazolium hydrogensulfate for lignocellulose pretreatment was also examined. It was found that Ionic Liquid liquors containing methyl sulfate, hydrogen sulfate and methanesulfonate anions were most effective in terms of lignin/cellulose fractionation and enhancement of cellulose digestibility.

Peng Tian - One of the best experts on this subject based on the ideXlab platform.

  • studies on room temperature Ionic Liquid incl3 emic
    Fluid Phase Equilibria, 2003
    Co-Authors: Jiazhen Yang, Peng Tian, Lingling He, Weiguo Xu
    Abstract:

    Abstract A new room temperature Ionic Liquid (RTIL) has been prepared by directly mixing InCl3 and 1-ethyl-3-methylimidazolium chloride (EMIC) under dry nitrogen atmosphere. The phase diagram of the binary system InCl3–EMIC was determined by DSC. Both Raman scattering and ab inito calculations indicate that InCl4− is the predominant indium-containing species in the Ionic Liquid. And it was further confirmed by NMR experiments.

  • Studies on room temperature Ionic Liquid InCl3–EMIC
    Fluid Phase Equilibria, 2003
    Co-Authors: Jiazhen Yang, Peng Tian, Lingling He, Weiguo Xu
    Abstract:

    Abstract A new room temperature Ionic Liquid (RTIL) has been prepared by directly mixing InCl3 and 1-ethyl-3-methylimidazolium chloride (EMIC) under dry nitrogen atmosphere. The phase diagram of the binary system InCl3–EMIC was determined by DSC. Both Raman scattering and ab inito calculations indicate that InCl4− is the predominant indium-containing species in the Ionic Liquid. And it was further confirmed by NMR experiments.