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http://earchive.tpu.ru/handle/11683/15068| Title: | Vacuum Effect on the Lactide Yield |
| Authors: | Yarkova, Anna Novikov, Viktor Timofeevich Glotova, Valentina Nikolaevna Shkarin, Roman Vladimirovich Borovikova, Yana |
| Keywords: | олигомеры; молочная кислота; лактиды; полимеры; вакуумные эффекты |
| Issue Date: | 2015 |
| Publisher: | Elsevier |
| Citation: | Vacuum Effect on the Lactide Yield / A. V. Yarkova [et al.] // Procedia Chemistry. — 2015. — Vol. 15 : Chemistry and Chemical Engineering in XXI century (CCE 2015) : XVI International Scientific Conference dedicated to Professor L.P. Kulyov, 25-29 May 2015, Tomsk, Russia. — [P. 301-307]. |
| Abstract: | The vacuum effect on the yield and purity of lactide obtained by catalytic lactic acid oligomer depolymerization was investigated. As raw material for the lactic acid oligomer synthesis the L-lactic acid aqueous solution was used. It was shown that the highest yield of raw-lactide takes place via distillation under a vacuum. The raw-lactide in all fractions was purified by recrystallization from dry ethyl acetate. The highest yield of raw-lactide is observed at a vacuum of 10 ... 15 mbar. The distillation process of raw-lactide is complicated with chemical reactions. Control of the reaction, raw materials and products was performed using DTA, gel permeation chromatography, infrared spectroscopy and high performance liquid chromatography. |
| URI: | http://earchive.tpu.ru/handle/11683/15068 |
| Appears in Collections: | Материалы конференций |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| j.proche.2015.10.048.pdf | 271,54 kB | Adobe PDF | View/Open |
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