Synthesis of l-lactide supplemented with stage-wise analytical control

Daria S. Krutas, Jirí Brožek, Václova Benešová, Alex L. Zinovyev, Viktor T. Novikov

Research output: Contribution to journalArticle

Abstract

L-lactide synthesis from an aqueous solution of L-lactic acid under different conditions in the presence or absence of a catalyst (zinc oxide, stannous octoate or magnesium ethoxide) has been studied. Synthe-sis of L-lactide is accompanied by analytical control. The glass transition temperature of lactic acid oligo-mers, i.e. a product of polycondensation at the first stage of the process, has been investigated using differential scanning calorimetry (DSC). Identification and quantitative deter-mination of lactic acid and L-lactide at different stages of the synthesis have been performed by HPLC. A residual solvent in L-lactide after its recrystallization has been determined by gas chromatography-mass spectrometry (GC-MS).

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalPetroleum and Coal
Volume58
Issue number5
Publication statusPublished - 1 Jan 2016

Keywords

  • Lactic acid oligomer
  • Lactide
  • Recrystallization

ASJC Scopus subject areas

  • Energy(all)

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