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首页> 外文期刊>RSC Advances >Bis-ammonium immobilized polystyrenes with co-catalyzing functional end groups as efficient and reusable heterogeneous catalysts for synthesis of cyclic carbonate from CO2 and epoxides
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Bis-ammonium immobilized polystyrenes with co-catalyzing functional end groups as efficient and reusable heterogeneous catalysts for synthesis of cyclic carbonate from CO2 and epoxides

机译：双氨固定化的聚苯乙烯与助催化官能端基团，以合成来自CO 2和环氧化物的环状碳酸酯的有效和可重复使用的非均相催化剂

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摘要

A series of novel bis-ammoniumionic liquid immobilized polystyrene (BisAm-i-PS) heterogeneous catalysts with co-catalyzing functional end groups of -CH2COOH, -CH2CH2OH, and -CH2CH2NH2 were synthesized for the cycloaddition reaction of CO2 and epoxides without any additional co-catalyst and organic solvent. All the ammonium immobilized catalysts showed high selectivity. Bis-ammonium immobilized catalysts were more efficient than single-ammonium ones. The yield was further increased by introducing the functional end groups. Both -CH2COOH and -CH2CH2OH terminated BisAm-i-PS catalysts achieved high activities (yield: > 99%), while the -NH2 terminated one had a slightly lower activity (yield: 97.3%) under the same reaction conditions. The effects of different parameters, such as the halide anions of the catalysts, reaction temperature, initial pressure and reaction time were also investigated with -CH2CH2OH terminated BisAm-i-PS (BisAm-OH-i-PS) as the catalyst. Under optimal reaction conditions (1.2 MPa, 130 degrees C and 2.5 h), BisAm-OH-i-PSs with 2Br(-) and 2I(-) showed very high efficiencies. For each of them, propylene carbonate selectivity and yield were more than 99% and 99%, respectively. In addition, the catalyst possessed good stability, and both catalytic activity and selectivity were always more than 99% for 5 times of recycle tests.
机译：一系列新的双 - 氨型液体固定化聚苯乙烯（BISAM-I-PS）与辅助催化 - CH 2 CHOOH，-CH 2 CH 2 OH和-CH2CH2的官能端基的非均相催化剂用于CO 2和环氧化物的环加成反应而没有任何额外的CO - 催化和有机溶剂。所有铵固定化催化剂都显示出高选择性。使双铵固定化的催化剂比单铵剂更有效。通过引入功能末端基团进一步提高产量。 -CH2COOH和-CH2CH 2 OH封端的BISAM-I-PS催化剂达到高活性（产率：99％），而-NH2终止于相同的反应条件下的活性略低（产率：97.3％）。用-CH 2 CH 2 OH封端的BISAM-I-PS（BISAM-OH-I-PS）作为催化剂，还研究了不同参数，例如催化剂的卤化物阴离子，例如催化剂，反应温度，初始压力和反应时间的影响。在最佳反应条件下（1.2MPa，130℃和2.5小时），具有2Br（ - - ）和2I（ - ）的Bisam-OH-I-PSS显示出非常高的效率。对于它们中的每一个，碳酸丙二醇酯选择性和产率分别超过99％和99％。此外，催化剂具有良好的稳定性，催化活性和选择性均始终超过99％的再循环试验。

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  • 来源
    《RSC Advances》 |2016年第3期|共8页
  • 作者

    Deng Qingyuan; He Gaohong; Pan Yu; Ruan Xuehua; Zheng Wenji; Yan Xiaoming;

  • 作者单位

    Dalian Univ Technol Sch Petr &

    Chem Engn State Key Lab Fine Chem Panjin 124221 LN Peoples R China;

    Dalian Univ Technol Sch Petr &

    Chem Engn State Key Lab Fine Chem Panjin 124221 LN Peoples R China;

    Dalian Univ Technol Sch Petr &

    Chem Engn State Key Lab Fine Chem Panjin 124221 LN Peoples R China;

    Dalian Univ Technol Sch Petr &

    Chem Engn State Key Lab Fine Chem Panjin 124221 LN Peoples R China;

    Dalian Univ Technol Sch Petr &

    Chem Engn State Key Lab Fine Chem Panjin 124221 LN Peoples R China;

    Dalian Univ Technol Sch Petr &

    Chem Engn State Key Lab Fine Chem Panjin 124221 LN Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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