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Vol. 29 No. 8 (2017): Vol 29 Issue 8

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Purification of Crude Lactide to Polymerization Grade Purity by Molt Recrystallization Method

https://doi.org/10.14233/ajchem.2017.20639
Igor Konoplev
Mendeleev D.I. Russian Chemical-Technological University, 125047 Moscow, Russia
Roman Kozlovskiy
Mendeleev D.I. Russian Chemical-Technological University, 125047 Moscow, Russia
Valeriy Shvets
Mendeleev D.I. Russian Chemical-Technological University, 125047 Moscow, Russia
Alexandr Kuznetsov Andrey Beloded
Mendeleev D.I. Russian Chemical-Technological University, 125047 Moscow, Russia
Georgiy Kagramanov
Mendeleev D.I. Russian Chemical-Technological University, 125047 Moscow, Russia
Vadim Safronov
Mendeleev D.I. Russian Chemical-Technological University, 125047 Moscow, Russia
Anna Yartym
Mendeleev D.I. Russian Chemical-Technological University, 125047 Moscow, Russia

Corresponding Author(s) : Igor Konoplev

igorknpl@gmail.com; 3xigor@mail.ru

Asian Journal of Chemistry, Vol. 29 No. 8 (2017): Vol 29 Issue 8

Abstract

Waste polymer materials are a greater threat to the environment, as a result it becomes necessary the development and production of biodegradable polymers. The process of purification of crude lactide by the method of melting impurities to polymerization grade L-lactide purity was investigated. Design and methodology for the process on a laboratory research installation was proposed. It is established that the yield and degree of purity of L-lactide are affected by two main parameters: the heating rate and nitrogen flow rate. It is found that under optimum conditions of purification of L-lactide from its major impurities is possible to obtain the product with polymerization grade purity with a yield of about 50 %. Optimal temperature profile of the process of the melting impurities were found. Wherein the total time of the stage of purification is reduced for 1.5 h with a sufficient reduction of energy consumption.

Keywords

Purification Lactide Melting of impurities Biodegradable polymers Esters of lactic acid
Konoplev, I., Kozlovskiy, R., Shvets, V., Andrey Beloded, A. K., Kagramanov, G., Safronov, V., & Yartym, A. (2017). Purification of Crude Lactide to Polymerization Grade Purity by Molt Recrystallization Method. Asian Journal of Chemistry, 29(8), 1797–1802. https://doi.org/10.14233/ajchem.2017.20639
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