The Experts below are selected from a list of 228 Experts worldwide ranked by ideXlab platform

Ruiqing Yao - One of the best experts on this subject based on the ideXlab platform.

  • synthesis of ethyl tert butyl ether from tert butyl alcohol and ethanol on strong acid Cation Exchange Resins
    Reactive & Functional Polymers, 2000
    Co-Authors: Bolun Yang, Sanba Yang, Ruiqing Yao
    Abstract:

    Abstract The etherifiCation between ethanol (EtOH) and tert-butyl alcohol (TBA) in the liquid phase under atmospheric pressure for the production of ethyl tert-butyl ether was studied. Three kinds of strong acid Cation-Exchange Resins, Amberlyst 15 (A-15), S-54 and D-72 in the H+ form, were used as the catalysts. The effects of temperature, water inhibition, catalyst loading and the reactants molar ratio on the reaction were investigated. The kinetic parameters, such as the activation energy and inhibition coefficient of water were also compared for the catalysts used. Among the catalysts tested, D-72 shows the highest activity, and S-54 shows the highest selectivity and the lowest effect of water inhibition for the production of ethyl tert-butyl ether.

M. M. Sharma - One of the best experts on this subject based on the ideXlab platform.

Eric M. Gaigneaux - One of the best experts on this subject based on the ideXlab platform.

  • behavior of Cation Exchange Resins employed as heterogeneous catalysts for esterifiCation of oleic acid with trimethylolpropane
    Applied Catalysis A-general, 2015
    Co-Authors: Marina Kuzminska, Rénal Backov, Eric M. Gaigneaux
    Abstract:

    Abstract Four Cation-Exchange Resins (Dowex 50wx2, Amberlyst 36, Purolite CT482 and Purolite CT275DR) were investigated as catalysts in the esterifiCation of oleic acid (OA) with trimethylolpropane (TMP). All four Resins accelerated the reaction kinetics. The results showed that in a solvent-free system, the gel-type resin Dowex 50wx2 must be pre-swollen prior the reaction to achieve high catalytic performance. Contrary, the macro-reticular Amberlyst 36, Purolite CT482 and Purolite CT275DR do not need any pre-treatment to be active. The latter is due to the high crosslinking degree of these Resins. Recyclability tests showed that the Resins slightly lose their activity after the first use but retain stable activity during the further uses. The activity decay of the recycled Resins is referred to the partial blocking of the active sites by the co-produced water. Additional studies confirmed the high stability of the chosen Resins toward leaching in polar medium. Overall, both high stability and possibility of reusing through still high catalytic activity make the Resins attractive candidates as heterogeneous catalysts for such complex industrial process.

  • Behavior of Cation-Exchange Resins employed as heterogeneouscatalysts for esterifiCation of oleic acid with trimethylolpropane
    Applied Catalysis A : General, 2014
    Co-Authors: Marina Kuzminska, Rénal Backov, Eric M. Gaigneaux
    Abstract:

    Four Cation-Exchange Resins (Dowex 50wx2, Amberlyst 36, Purolite CT482 and Purolite CT275DR) wereinvestigated as catalysts in the esterifiCation of oleic acid (OA) with trimethylolpropane (TMP). All fourResins accelerated the reaction kinetics. The results showed that in a solvent-free system, the gel-typeresin Dowex 50wx2 must be pre-swollen prior the reaction to achieve high catalytic performance.Contrary, the macro-reticular Amberlyst 36, Purolite CT482 and Purolite CT275DR do not need any pre-treatment to be active. The latter is due to the high crosslinking degree of these Resins. Recyclabilitytests showed that the Resins slightly lose their activity after the first use but retain stable activity duringthe further uses. The activity decay of the recycled Resins is referred to the partial blocking of the activesites by the co-produced water. Additional studies confirmed the high stability of the chosen Resinstoward leaching in polar medium. Overall, both high stability and possibility of reusing through stillhigh catalytic activity make the Resins attractive candidates as heterogeneous catalysts for such complexindustrial process.

Marina Kuzminska - One of the best experts on this subject based on the ideXlab platform.

  • behavior of Cation Exchange Resins employed as heterogeneous catalysts for esterifiCation of oleic acid with trimethylolpropane
    Applied Catalysis A-general, 2015
    Co-Authors: Marina Kuzminska, Rénal Backov, Eric M. Gaigneaux
    Abstract:

    Abstract Four Cation-Exchange Resins (Dowex 50wx2, Amberlyst 36, Purolite CT482 and Purolite CT275DR) were investigated as catalysts in the esterifiCation of oleic acid (OA) with trimethylolpropane (TMP). All four Resins accelerated the reaction kinetics. The results showed that in a solvent-free system, the gel-type resin Dowex 50wx2 must be pre-swollen prior the reaction to achieve high catalytic performance. Contrary, the macro-reticular Amberlyst 36, Purolite CT482 and Purolite CT275DR do not need any pre-treatment to be active. The latter is due to the high crosslinking degree of these Resins. Recyclability tests showed that the Resins slightly lose their activity after the first use but retain stable activity during the further uses. The activity decay of the recycled Resins is referred to the partial blocking of the active sites by the co-produced water. Additional studies confirmed the high stability of the chosen Resins toward leaching in polar medium. Overall, both high stability and possibility of reusing through still high catalytic activity make the Resins attractive candidates as heterogeneous catalysts for such complex industrial process.

  • Behavior of Cation-Exchange Resins employed as heterogeneouscatalysts for esterifiCation of oleic acid with trimethylolpropane
    Applied Catalysis A : General, 2014
    Co-Authors: Marina Kuzminska, Rénal Backov, Eric M. Gaigneaux
    Abstract:

    Four Cation-Exchange Resins (Dowex 50wx2, Amberlyst 36, Purolite CT482 and Purolite CT275DR) wereinvestigated as catalysts in the esterifiCation of oleic acid (OA) with trimethylolpropane (TMP). All fourResins accelerated the reaction kinetics. The results showed that in a solvent-free system, the gel-typeresin Dowex 50wx2 must be pre-swollen prior the reaction to achieve high catalytic performance.Contrary, the macro-reticular Amberlyst 36, Purolite CT482 and Purolite CT275DR do not need any pre-treatment to be active. The latter is due to the high crosslinking degree of these Resins. Recyclabilitytests showed that the Resins slightly lose their activity after the first use but retain stable activity duringthe further uses. The activity decay of the recycled Resins is referred to the partial blocking of the activesites by the co-produced water. Additional studies confirmed the high stability of the chosen Resinstoward leaching in polar medium. Overall, both high stability and possibility of reusing through stillhigh catalytic activity make the Resins attractive candidates as heterogeneous catalysts for such complexindustrial process.

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

  • synthesis of ethyl tert butyl ether from tert butyl alcohol and ethanol on strong acid Cation Exchange Resins
    Reactive & Functional Polymers, 2000
    Co-Authors: Bolun Yang, Sanba Yang, Ruiqing Yao
    Abstract:

    Abstract The etherifiCation between ethanol (EtOH) and tert-butyl alcohol (TBA) in the liquid phase under atmospheric pressure for the production of ethyl tert-butyl ether was studied. Three kinds of strong acid Cation-Exchange Resins, Amberlyst 15 (A-15), S-54 and D-72 in the H+ form, were used as the catalysts. The effects of temperature, water inhibition, catalyst loading and the reactants molar ratio on the reaction were investigated. The kinetic parameters, such as the activation energy and inhibition coefficient of water were also compared for the catalysts used. Among the catalysts tested, D-72 shows the highest activity, and S-54 shows the highest selectivity and the lowest effect of water inhibition for the production of ethyl tert-butyl ether.