Vacuum Effect on the Lactide Yield; Procedia Chemistry; Vol. 15 : Chemistry and Chemical Engineering in XXI century (CCE 2015)
| Parent link: | Procedia Chemistry Vol. 15 : Chemistry and Chemical Engineering in XXI century (CCE 2015).— 2015.— [P. 301-307] |
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| Ente Autore: | |
| Altri autori: | , , , , |
| Riassunto: | Title screen 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. Режим доступа: по договору с организацией-держателем ресурса |
| Lingua: | inglese |
| Pubblicazione: |
2015
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| Soggetti: | |
| Accesso online: | http://dx.doi.org/10.1016/j.proche.2015.10.048 http://earchive.tpu.ru/handle/11683/15068 |
| Natura: | Elettronico Capitolo di libro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=645387 |
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| 200 | 1 | |a Vacuum Effect on the Lactide Yield |f A. V. Yarkova [et al.] | |
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| 300 | |a Title screen | ||
| 320 | |a [References: р. 306-307 (36 tit.)] | ||
| 330 | |a 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. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | 0 | |0 (RuTPU)RU\TPU\network\3889 |t Procedia Chemistry | |
| 463 | 0 | |0 (RuTPU)RU\TPU\network\10324 |t Vol. 15 : Chemistry and Chemical Engineering in XXI century (CCE 2015) |o XVI International Scientific Conference dedicated to Professor L.P. Kulyov, 25-29 May 2015, Tomsk, Russia |f National Research Tomsk Polytechnic University (TPU) ; ed. E. I. Korotkova |v [P. 301-307] |d 2015 | |
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| 701 | 1 | |a Yarkova |b A. V. |g Anna | |
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