Zobrazeno 1 - 10
of 36
pro vyhledávání: '"A. V. Levdansky"'
Autor:
Alexander V. Levdansky, Natalya Yu. Vasilyeva, Yuriy N. Malyar, Alexander A. Kondrasenko, Olga Yu. Fetisova, Aleksandr S. Kazachenko, Vladimir A. Levdansky, Boris N. Kuznetsov
Publikováno v:
Molecules, Vol 27, Iss 19, p 6356 (2022)
For the first time, the process of birch ethanol lignin sulfation with a sulfamic acid-urea mixture in a 1,4-dioxane medium was optimized experimentally and numerically. The high yield of the sulfated ethanol lignin (more than 96%) and containing 7.1
Externí odkaz:
https://doaj.org/article/7764fe8522a04d9c92d5ffdc5627e9ee
Autor:
Valentina S. Borovkova, Angelina V. Miroshnikova, A. V. Levdansky, A. S. Kazachenko, O. Yu. Fetisova, N. Yu. Vasilyeva, Andrey M. Skripnikov, Yu. N. Malyar
Publikováno v:
Catalysis Today. :397-406
Sulfation of wheat straw soda lignin by the sulfamic acid–urea mixture in different solvents has been investigated for the first time. The effect of a catalyst used in the lignin sulfation process on the yield of the lignin sulfates and sulfur cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e818e2a62b6bb1f2769c8dd423c27d6
https://doi.org/10.1016/j.cattod.2021.07.033
https://doi.org/10.1016/j.cattod.2021.07.033
Publikováno v:
Journal of Siberian Federal University. Chemistry. 14:325-336
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 st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8c5ea1b6ba5deb2493be49e7db97b0c
https://doi.org/10.17516/1998-2836-0241
https://doi.org/10.17516/1998-2836-0241
Publikováno v:
Journal of Siberian Federal University. Chemistry. :263-275
The analysis of the latest publications on the use of hydrolytic lignin, which is a large-tonnage waste of wood chemical processing, was carried out. In its original form, the hydrolytic lignin is used as fuel, fuel briquettes and pellets, binders an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9499c58713e34f83b46b524ec1c9559e
https://doi.org/10.17516/1998-2836-0236
https://doi.org/10.17516/1998-2836-0236
Autor:
А. V. Levdansky, Boris N. Kuznetsov, V. А. Levdansky, A S Kazachenko, Yu. N. Malyar, N. Yu. Vasilyeva, Alexander A. Kondrasenko
Publikováno v:
Biomass Conversion and Biorefinery. 12:1229-1236
The sulfation of ethanol lignin of abies wood by sulfamic acid–urea mixture in N,N-dimethylformamide (DMF) medium was studied for the first time. The effect of the duration of lignin sulfation process on the yield and sulfur content in resulted lig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a05b2e14979512b0b01f2355e3909331
https://doi.org/10.1007/s13399-020-00706-0
https://doi.org/10.1007/s13399-020-00706-0
Autor:
Alexander S. Kazachenko, Irina V. Korolkova, Maxim A. Lutoshkin, Galina P. Skvortsova, Nikolai G. Maximov, Alexander V. Levdansky, Boris N. Kuznetsov, Natalia Yu. Vasilyeva
Publikováno v:
Journal of Siberian Federal University. Chemistry. :142-152
For the first time water soluble copper-containing polymers based on sulfated ethanol lignin of abies wood were obtained by the method of ion exchange. Their composition and structure were studied with the use of elemental and chemical analysis, infr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bc4859bd87a031beb884c789c1d6cf7
https://doi.org/10.17516/1998-2836-0170
https://doi.org/10.17516/1998-2836-0170
Publikováno v:
Journal of Siberian Federal University. Chemistry. :604-613
The process of proanthocyanidins isolation from abies bark by water and water-alcohol solutions containing 5, 10, 15 and 20 % ethanol was studied for the first time. The optimal conditions providing the maximum yield of proanthocyanidins were determi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::770e3ee6e810b0de6f2167ad8e5131a8
https://doi.org/10.17516/1998-2836-0155
https://doi.org/10.17516/1998-2836-0155
Autor:
Boris N. Kuznetsov, Vladimir A. Levdansky, Yuriy N. Malyar, Alexander V. Levdansky, Alexander A. Kondrasenko
Publikováno v:
Journal of Siberian Federal University. Chemistry. :201-220
The analysis of the literature on the spectral methods of lignins study was carried out. The most suitable spectral methods for elucidating the structural features of soluble organosolv lignins were selected. The possibilities of FTIR, 1Н NMR, 13С
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::405e49c330c346cf22e303fb6ee0f78b
https://doi.org/10.17516/1998-2836-0119
https://doi.org/10.17516/1998-2836-0119
Transport of gas molecules through dense membranes and intensification of mass transfer by radiation
Publikováno v:
Chemical Engineering and Processing - Process Intensification. 137:48-53
It is known that fouling of membranes decreases their performance. New modern types of membranes which are used for separation of gas mixtures (e.g. supported ionic liquid and graphene-based membranes) require the methods for cleaning which differ fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b640c4ac3d446164baa82b58e814daba
https://doi.org/10.1016/j.cep.2019.01.013
https://doi.org/10.1016/j.cep.2019.01.013
Publikováno v:
Journal of Siberian Federal University. Chemistry. 12:73-86
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb973b0415c0e00755c7c3edb8f6cf59
https://doi.org/10.17516/1998-2836-0109
https://doi.org/10.17516/1998-2836-0109