Journal of Siberian Federal University. Chemistry / Numerical Optimization of the Abies Ethanol Lignin Sulfation Process with Sulfamic Acid in 1,4-Dioxane Medium in the Presence of Urea

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2020 13 (2)
Authors
Kazachenko, Aleksandr S.; Vasilyeva, Natalya Yu.; Sudakova, Irina G.; Levdansky, Vladimir A.; Lutoshkin, Maxim A.; Kuznetsov, Boris N.
Contact information
Kazachenko, Aleksandr S.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Scientific Center SB RAS” Krasnoyarsk, Russian Federation; Vasilyeva, Natalya Yu.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Scientific Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russia Federation; Sudakova, Irina G.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Scientific Center SB RAS” Krasnoyarsk, Russian Federation; Levdansky, Vladimir A.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Scientific Center SB RAS” Krasnoyarsk, Russian Federation; Lutoshkin, Maxim A.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Scientific Center SB RAS” Krasnoyarsk, Russian Federation; Kuznetsov, Boris N.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Scientific Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russia Federation;
Keywords
abies ethanol lignin; sulfation; sulfamic acid; urea, 1,4-dioxane; sulfated ethanol lignin; process optimization
Abstract

The process of abies ethanol lignin sulfation with sulfamic acid in 1,4-dioxane medium in the presence of urea was optimized by calculation methods. The influence of such factors, as the ratio of lignin/sulfating complex (L/SC), temperature and time of the sulfation process on the sulfur content in the resulting sulfated ethanol lignin and its yield, has been established. The variance analysis of the obtained mathematical models testifies their good predictive properties. The optimal conditions of abies ethanol lignin sulfation process, which provide the formation of water-soluble sulfated lignin with a high yield (to 100 % wt.) and sulfur content (up to 7.9 % wt.), have been established. They are: temperature of 95-100 °C, the ratio L/SC 1:2,3-1:2:9 and the time of the process 119-137 minutes

Pages
232-246
DOI
10.17516/1998-2836-0178
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/135401