Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.17516/1998-2836-0241
Ключевые слова: xylan, sulfation, sulfamic acid, urea, 1,4-dioxane, xylan sulfate
Аннотация: Sulfation of birch wood xylan in 1,4-dioxane by sulfamic acid in the presence of urea at 90 and 100 degrees C was studied for the first time. The effect of the duration of xylan sulfation on the yield of xylan sulfates and the sulfur content in them was studied. It was found that the sulfur content in the obtained xylan sulfates inПоказать полностьюcreases from 12.5 to 17.5 wt% with an increase in the duration of sulfation from 2 to 4 hours. The structure of initial and sulfated xylan was studied by FTIR and NMR spectroscopy. The ease of purification of the obtained xylan sulfates from 1,4-dioxane in comparison with the purification of xylan sulfates obtained by sulfation in pyridine and N, N-dimethylformamide is an advantage of the proposed method of xylan sulfation. Sulfation of birch wood xylan in 1, 4-dioxane by sulfamic acid in the presence of urea at 90 and 100 °C was studied for the first time. The effect of the duration of xylan sulfation on the yield of xylan sulfates and the sulfur content in them was studied. It was found that the sulfur content in the obtained xylan sulfates increases from 12.5 to 17.5 wt% with an increase in the duration of sulfation from 2 to 4 hours. The structure of initial and sulfated xylan was studied by FTIR and NMR spectroscopy. The ease of purification of the obtained xylan sulfates from 1, 4-dioxane in comparison with the purification of xylan sulfates obtained by sulfation in pyridine and N, N dimethylformamide is an advantage of the proposed method of xylan sulfation. © Siberian Federal University. All rights reserved.
Журнал: JOURNAL OF SIBERIAN FEDERAL UNIVERSITY-CHEMISTRY
Выпуск журнала: Vol. 14, Is. 3
Номера страниц: 325-336
ISSN журнала: 19982836
Место издания: KRASNOYARSK
Издатель: SIBERIAN FEDERAL UNIV