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Crosslinked polystyrene beads modified with sulfonyl groups and their application in aromatic/aliphatic hydrocarbons separation

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Abstract

The separation of aromatic hydrocarbons from aromatic/aliphatic mixtures was investigated with cross-linked polystyrene(CPS) beads modified with sulfonyl groups. Three sulfonating agents, i.e. benzenesulfonyl chloride( BsCl), 4-toluene sulfonyl chloride(TsCl) and methanesulfonyl chloride(MsCl) were used to prepare sulfonyl CPS beads by Friedel-Crafts reaction. The CPS beads modified with BsCl exhibited higher sulfonation rate than those modified with MsCl and TsCl and obtained optimum selectivity in the experiments of toluene/n-heptane separation. Further separation tests with various other aromatic/aliphatic mixtures were carried out at an initial aromatic concentration of 13%(mass fraction) with the results showing that the modified beads have preferential selectivity for aromatic hydrocarbons in all aromatic/aliphatic mixtures, and especially a separation factor of 8.21 and a swelling ratio of 30% for toluene/cyclohexane system. The thermal stability and regeneration test indicate that the used polystyrene beads can be recovered through heat-drying and reused effectively.

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Correspondence to Zhanchen Cui.

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Supported by the National Natural Science Foundation of China(Nos.21204028, 51173063).

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Yu, H., Cai, Z., Guan, J. et al. Crosslinked polystyrene beads modified with sulfonyl groups and their application in aromatic/aliphatic hydrocarbons separation. Chem. Res. Chin. Univ. 30, 1066–1070 (2014). https://doi.org/10.1007/s40242-014-4156-1

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  • DOI: https://doi.org/10.1007/s40242-014-4156-1

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