Browse > Article

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);
Citations & Related Records
연도 인용수 순위
  • Reference
1 Kim, D. P., Kim, B. K., Cho, Y. M., Han, M. W. and Kim, B. S., "Kinetics of Polycarbonate Glycolysis in Ethylene Glycol," Ind. Eng. Chem. Res, 48, 685-691(2009).   DOI   ScienceOn
2 Pinero, R., Garcia, J. and Cocero, M. J., "Chemical Recycling of Polycarbonate in a Semi-continuous Lab-plant. A Green Route with Methanol and Methanol-water Mixtures," GreenChem, 7, 380-387 (2005).
3 Lin, C. H., Lin, H. Y., Liao, W. Z. and Shenghong, A., "Novel Chemical Recycling of Polycarbonate(PC) Waste into Bis-hydroxyalkyl Ethers of Bisphenol A for Use as PU Raw Materials," Green. Chem, 9, 38-43(2007).   DOI   ScienceOn
4 Pinero, R., Garcia, J. and Cocero, M. J., "Nonstationary Model of the Semicontinuous Depolymerization of Polycarbonate," AIChE J, 52, 4186-4199(2006).   DOI   ScienceOn
5 Buysch, H. J., Schoen, N., Kuehling, S. and Verfahren, Z. S., "Polycarbonaten in Bisphenol und Diarylcarbonate," Ger. Patent No. 4,220,412(1994).
6 Fox, D. W. and Peters, E. N., "Method for Recovering a Dihydric Phenol from a Scrap Polyester," U.S. Patent No. 4,885,407 (1989).
7 Shafer, S. J. and Park, C., "Method for Recovering Bis Hydroxy Aromatic Organic Values and Bis Aryl Carbonate Values from Scrap Aromatic Polycarbonate," U.S. Patent No. 5,336,814(1994).
8 Arai, R., Zenda, K., Kazuko, K. H., Toshitaka, Y. and Funaxuluri, T., "Reaction Kinetics of Hydrothermal Depolymerization of Poly(ethylene naphthalate), Poly(ethylene terephthalate), and Polycarbonate with Aqueous Ammonia Solution," Chem. Eng. Sci.
9 Hu, L. C., Oku, A. and Yamada, E., "Alkali-catalyzed Methanolysis of Polycarbonate. A Study on Recycling of Bisphenol A and Dimethyl Carbonate," Polymer, 39, 3841-3845(1998).   DOI   ScienceOn
10 Oku, A., Tanaka, S. and Hata, S., "Chemical Conversion of Polycarbonate to Bishydroxyethyl Ether of Bisphenol A. An Approach to the Chemical Recycling of Plastic Wastes as Monomers," Polymer, 41, 6749-6753(2000).   DOI   ScienceOn
11 Kim, D. P., Kim, B. K., Cho, Y. M., Han, M. W. and Kim, B. S., "Kinetics of Polycarbonate Methanolysis by a Consecutive Reaction Model," Ind. Eng. Chem. Res, 48, 6591-6599(2009).   DOI   ScienceOn
12 Jang, B. N. and Wilkie, C. A., "A TGA/FTIR and Mass Spectral Study on the Thermal Degradation of Bisphenol A Polycarbonate," Polym. Degrad. Stab, 86, 419-430(2004).   DOI   ScienceOn