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


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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.

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I. Konoplev

Dmitry Mendeleev University of Chemical Technology of Russia

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俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

R. Kozlovskii

Dmitry Mendeleev University of Chemical Technology of Russia

Email: 3xigor@mail.ru
俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

V. Shvets

Dmitry Mendeleev University of Chemical Technology of Russia

Email: 3xigor@mail.ru
俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

A. Kuznetsov

Dmitry Mendeleev University of Chemical Technology of Russia

Email: 3xigor@mail.ru
俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

A. Beloded

Dmitry Mendeleev University of Chemical Technology of Russia

Email: 3xigor@mail.ru
俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

G. Kagramanov

Dmitry Mendeleev University of Chemical Technology of Russia

Email: 3xigor@mail.ru
俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

V. Safronov

Dmitry Mendeleev University of Chemical Technology of Russia

Email: 3xigor@mail.ru
俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

A. Yartym

Dmitry Mendeleev University of Chemical Technology of Russia

Email: 3xigor@mail.ru
俄罗斯联邦, ul. Miusskaya 9, Moscow, 125047

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