Abstract
Mesoporous molecular sieves CaO(BaO, SrO)/SBA-15, which can produce basic sites, were synthesized by impregnation of a certain amount of CaO(BaO, SrO) on the synthesis of SBA-15 support, and used as heterogeneous catalysts for the methanolysis of polycarbonate (PC). The physicochemical properties, textual structures and catalytic performance were then studied in detail. The results showed that CaO/SBA-15 exhibited better catalytic activity than BaO/SBA-15 and SrO/SBA-15, and its catalytic activity was related to the loading amount of CaO. Moreover, the obtained product from the methanolysis of PC was mainly bisphenol A (BPA) with high purity. The influneces on reaction conditions of PC methanolysis catalyzed by 10%CaO/SBA-15 were also investigated. It was indicated that the PC conversion was nearly 100% and the BPA yield was over 96%. The stability of catalyst showed that 10%CaO/SBA-15 catalysts could be recycled and reused with negligible loss in activity over five cycles. In addition, a possible catalysis mechanism for the methanolysis of PC was proposed.
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Acknowledgements
This research was supported financially by the National Natural Science Foundation of China (No. 51673106), The Taishan Scholars Projects of Shandong (ts201511033) the Natural Science Foundation of Shangdong Province (No. ZR2015BM029) and the Science and Technology Research Project of Shandong Province (No. 2016GSF116005).
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Zhao, Y., Zhang, X., Song, X. et al. Highly Active and Recyclable Mesoporous Molecular Sieves CaO(SrO,BaO)/SBA-15 with Base Sites as Heterogeneous Catalysts for Methanolysis of Polycarbonate. Catal Lett 147, 2940–2949 (2017). https://doi.org/10.1007/s10562-017-2193-3
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DOI: https://doi.org/10.1007/s10562-017-2193-3