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Production of PBT(polybutylene terephthalate) Oligomer from Recycled PET(polyethylene terephthalate)
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  • Journal title : Korean Chemical Engineering Research
  • Volume 54, Issue 4,  2016, pp.437-442
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2016.54.4.437
 Title & Authors
Production of PBT(polybutylene terephthalate) Oligomer from Recycled PET(polyethylene terephthalate)
Cho, Minjeong; Yang, Jeongin; Noh, Seunghyun; Joe, Hongjae; Han, Myungwan;
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A new route for PBT (Poly butylene terephthalate) production from recycled PET (Poly ethylene terephthalate) has been explored. The route consists of glycolysis of PET (Poly ethylene terephthalate) wastes using 1,4-butandiol into BHBT oligomers and polycondensation of the oligomers into PBT oligomer. This process uses post-consumer or post-industrial recycled PET and converts it into high-end PBT type engineering thermoplastic via a chemical recycling process. Zink acetate was used as a catalyst for both glycolysis and polycondensation. Two types of reactor for the glycolysis, batch and semi-batch reactor, were investigated and their performances were compared. Semi-batch reactor removes ethylene glycol (EG) and THF (tetrahydrofuran) during the reaction. Amounts of EG and THF generated during the glycolysis reaction were measured and used as criteria for the reactor performance. Performance of semi-batch reactor was shown to be better than that of batch reactor. Optimum reaction condition for the semi-batch reactor was BD/PET ratio of 4, and reaction temperature of , giving high EG yield (max 91%) and low production of THF. In addition, it was confirmed that the molecular weight of PBT oligomer increases in accordance with the progress of the polycondensation reaction.
 Cited by
Imran, M., Kim, B., Han, M., Cho, B. and Kim, D., "Sub- and Supercritical Glycolysis of Polyethylene Terephthalate(PET) Into the Monomer Bis(2-hydroxyethyl) Terephthalate(BHET)," Polym. Degrad. Stab., 95, 1686-1693(2010). crossref(new window)

Imran, M., Lee, K., Imtiaz, Q., Kim, B., Han, M., Cho, B. and Km, D., "Metal-Oxide-Doped Silica Nanopaticles for the Catalytic Glycolysis of Polyethylene Terephthalate," J. Nanosci. Nanotechnol., 11, 824-828(2011). crossref(new window)

Bartolome, L., Imran, M., Cho, B. G., Al-Masry, W. A. and Kim, D. H., "Recent Developments in the Chemical Recycling of PET," Material Recycling-Trends and Perspectives, 406(2012).

Han, M., Kang, K. S. and Song, J. K., "Chemical Recycling Technology Technology from Polyester Wastes," Elastomers and Composites, 47(2), 96-103(2012). crossref(new window)

Jo, S., Kim. G., Cho. M., Han. M. and Kang. K., "Feedstock Recycling Technology from Polyester Wastes," Korean Chem. Eng. Res., 52(1), 17-25(2014). crossref(new window)

Neeta G. Kulkarni, C. V. Avadhani, and S. Sivaram., "Efficient Method for Recycling Poly(ethylene terephthalate) to Poly(butylene terephthalate) Using Transesterification Reaction," Journal of Applied Polymer Science, 91, 3720-3729(2004). crossref(new window)

Darda, P. J. and Hogendoorn, J. A. and Versteeg, G. F. and Souren, F., "Reaction Kinetics of Polybutylene Terephthalate Polycondensation Reaction," AIChE Journal., 51, 622-63(2005). crossref(new window)

Chilukuri, V. A.; Sivaram, S. U.S. Patent 5 451 611, 1995.