Preparation of L-lactide of polymerization purity with removal of impurities by fractional melting

I. A. Konoplev; R. A. Kozlovskii; V. F. Shvets; A. E. Kuznetsov; A. V. Beloded; G. G. Kagramanov; V. A. Safronov; A. I. Yartym

doi:10.1134/S1070427217030144

Preparation of L-lactide of polymerization purity with removal of impurities by fractional melting

Authors: Konoplev I.A.¹, Kozlovskii R.A.¹, Shvets V.F.¹, Kuznetsov A.E.¹, Beloded A.V.¹, Kagramanov G.G.¹, Safronov V.A.¹, Yartym A.I.¹
Affiliations:
1. Dmitry Mendeleev University of Chemical Technology of Russia
Issue: Vol 90, No 3 (2017)
Pages: 415-422
Section: Macromolecular Compounds and Polymeric Materials
URL: https://journal-vniispk.ru/1070-4272/article/view/214779
DOI: https://doi.org/10.1134/S1070427217030144
ID: 214779

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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.