Abstract
Isolation and purification of L-lactide to reach the polymerization purity level with removal of impurities by fractional melting was studied. The process implementation was suggested, and the influence of various parameters on the rate and degree of impurity removal was examined. The optimum conditions for removal of the main impurities from L-lactide were found. The method allows preparation of L-lactide of polymerization purity in approximately 50% yield.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Razza, F., Degli Innocenti, F., Dobon, A., et al., J. Clean. Product., 2012, vol. 102, pp. 493–500.
Luckachan, G.E., J. Polym. Environ., 2011, vol. 19, no. 3, pp. 637–676.
Davis, G. and Song, J.H., Ind. Crops Prod., 2006, vol. 23, pp. 147–161.
Gandini, A. and Lacerda, T.M., Prog. Polym. Sci., 2015, vol. 48, pp. 1–39.
Nampoothiri, K.M., Nair, N.R., and John, R.P., Bioresource Technol., 2010, vol. 101, pp. 8493–8501.
Auras, R., Loong-Tak Lim, Selke, S.E.M., and Tsuji, H., Poly(lactic acid) Synthesis, Structures, Properties, Processing, and Applications, New Jersey Wiley, 2010.
Ren, J., Biodegradable Poly(Lactic Acid): Synthesis, Modification, Processing and Applications, Beijing Tsinghua Univ. Press, 2010.
US Patent 5675021, Publ. 1997.
Corma, A., Iborra, S., and Velty, A., Chem. Rev., 2007, vol. 107, pp. 2411–2502.
US Patent 5786185, Publ. 1998.
EP Patent 0614983, Publ. 1994.
US Patent 5071754, Publ. 1991.
JP Patent 10036366, Publ. 1998.
US Patent 7488783, Publ. 2006.
Ding Hai-bing and Wang Ying-zhi, Juzhi gongye (Polyester Ind.), 2010, vol. 23, no. 2, pp. 1–3.
Zhang Tao, Shi Jian-ming, Zhang Shao-jun, and Jiang Shouying, Huaxue gongcheng [Chem. Eng. (China)], 2010, vol. 38, no. 12, pp. 22–25.
Han Ning, Wang Peng, Zhang Ying-min, and Shi Shu-jie, Guocheng gongcheng xuebao (Chin. J. Process Eng.), 2007, vol. 7, no. 2, pp. 306–309.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © I.A. Konoplev, R.A. Kozlovskii, V.F. Shvets, A.E. Kuznetsov, A.V. Beloded, G.G. Kagramanov, V.A. Safronov, A.I. Yartym, 2017, published in Zhurnal Prikladnoi Khimii, 2017, Vol. 90, No. 3, pp. 355−362.
Rights and permissions
About this article
Cite this article
Konoplev, I.A., Kozlovskii, R.A., Shvets, V.F. et al. Preparation of L-lactide of polymerization purity with removal of impurities by fractional melting. Russ J Appl Chem 90, 415–422 (2017). https://doi.org/10.1134/S1070427217030144
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1070427217030144