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Synthesis of Bishydroxyethyl Ether of Bisphenol A(BHE-BPA) Through the Depolymerization of Polycarbonate  

Heo, Miseon (Korea Research Institute of Chemical Technology)
Kim, Beomsik (Korea Research Institute of Chemical Technology)
Park, Youin (Korea Research Institute of Chemical Technology)
Han, Myungwan (Department of Chemical Engineering, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.48, no.2, 2010 , pp. 164-171 More about this Journal
Abstract
Recently, the waste of Polycarbonate(PC) is increase with the increase in demand of a polycarbonate. It is concerned with producing a new material and diol monomer, bishydroxyethyl ether of bisphenol A(BHE-BPA) through depolymerization of the polycarbonate waste at recycling. BHE-BPA can be used as a good raw material for the synthesis of polycarbonate type polyurethane. PC particles were depolymerized with base-catalyst NaOH, solvent EG, and ethylene carbonate(EC) was formed during the PC depolymerziation. EC was added to promote the conversion from bispenol-A to BHE-BPA. The characteristics of depolymeraion of polycarbonate as well as conversion of bispenol-A to BHE-BPA were investigated. BHE-BPA yield of 92% was obtained at temperature $220^{\circ}C$, 10% catalyst/PC mole ratio, 20 mmol of EC. BHE-BPA purity of better than 99% was achieved by crystallization of BHE-BPA.
Keywords
PC(Polycarbonate); BHE-BPA(bishydroxyethyl ether of bisphenol A); EC(Ethylenecarbonate);
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