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Ionic liquid-complex Pd/C system as catalyst for copolymerization of CO and styrene

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Abstract

The copolymerization of CO and styrene catalyzed by Pd/C toward the formation of polyketones (PK)was studied in the N-valeronitrile-N′-methylimidazolium hexafluorophosphate ([C4CNmim]+PF6 -) medium. The synthesized PK was characterized by Fourier transform infrared(FTIR), elemental analysis, 13C-nuclear magnetic resonance (13C-NMR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and gel permeation chromatography (GPC). The supported ionic liquid film on the surface of Pd/C catalyst can prevent the products from covering the hole of active carbon due to its chemical stability and weak coordination ability with metal ions, and thus efficiently improve the catalytic activity. The effects of different amounts of ionic liquid on the catalytic activity and reusability of the catalyst and the molecular weight of PK were discussed. When the usage of ionic liquid is 10wt% (0.1 g ionic liquid / 1 g active carbon carrier) and the theoretical content of Pd2+ is 5wt% (0.05 g Pd2+/ 1 g active carbon carrier), the highest catalytic activity 2 963.64 gSTCO/(gPd · h) is achieved with the molecular weight and polydispersity index of PK as M n = 9 684, M w = 13 452 and M w/M n = 1.389.

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Haixia Wang  (王海霞), Jintang Guo  (郭锦棠), Guang Hu  (胡 光) & Yakai Feng  (冯亚凯)

  2. College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024, China

    Ruitao Wu  (武瑞涛)

Authors
  1. Haixia Wang  (王海霞)
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  2. Jintang Guo  (郭锦棠)
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  3. Guang Hu  (胡 光)
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  4. Yakai Feng  (冯亚凯)
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  5. Ruitao Wu  (武瑞涛)
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Corresponding author

Correspondence to Jintang Guo  (郭锦棠).

Additional information

Supported by the Tianjin Natural Science Foundation (No. 07JCYBJC00600).

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Wang, H., Guo, J., Hu, G. et al. Ionic liquid-complex Pd/C system as catalyst for copolymerization of CO and styrene. Trans. Tianjin Univ. 20, 48–53 (2014). https://doi.org/10.1007/s12209-014-2161-6

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  • DOI: https://doi.org/10.1007/s12209-014-2161-6

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