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• W2806177777 abstract "Abstract Polycarbonate (PC) wastes, including optical discs (CDs) and digital optical discs (DVDs), were chemically recycled into valuable materials such as 4,4′-(propane-2,2-diyl)diphenol (BPA) and etherified derivatives of BPA using sodium hydroxide (NaOH) as the alkali metal catalyst and nanostructured titanium dioxide (nano-TiO 2 ) and microstructured titanium dioxide (micro-TiO 2 ) as the solid supports in the binary green system consisting of water and 2,2′-oxydi(ethan-1-ol) (DEG) under conventional heating method, and data were compared. In this study, the effects of various parameters, such as solvent composition, concentration of NaOH, and solid support, were studied on the reaction progress. In these reactions, the importance of water as the green solvent was investigated in achieving pure BPA as the valuable material. When used with 20% aqueous DEG (pbw), a pure BPA can be obtained at 70% yield in the presence of nano-TiO 2 and micro-TiO 2 as the solid supports. According to the results, the use of nano-TiO 2 in comparison with micro-TiO 2 accelerates the chemical recycling of PC wastes. The nano-TiO 2 catalyst recovery shows that the recovered solid support is applicable for four cycles. The obtained products were characterized using spectroscopic methods, namely, 1 H NMR, 13 C NMR, and Fourier transform infrared spectroscopy as well as gas chromatography-mass spectrometry." @default.
• W2806177777 created "2018-06-13" @default.
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• W2806177777 date "2019-01-28" @default.
• W2806177777 modified "2023-10-18" @default.
• W2806177777 title "Environmentally benign chemical recycling of polycarbonate wastes: comparison of micro- and nano-TiO2 solid support efficiencies" @default.
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• W2806177777 doi "https://doi.org/10.1515/gps-2018-0028" @default.
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