Sulfation of ethanol lignin of abies wood by sulfamic acid in N,N-dimethylformamide medium
| Autor: | А. V. Levdansky, Boris N. Kuznetsov, V. А. Levdansky, A S Kazachenko, Yu. N. Malyar, N. Yu. Vasilyeva, Alexander A. Kondrasenko |
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| Rok vydání: | 2020 |
| Předmět: |
Ethanol
Renewable Energy Sustainability and the Environment 020209 energy fungi technology industry and agriculture food and beverages Alcohol macromolecular substances 02 engineering and technology 010501 environmental sciences complex mixtures 01 natural sciences Gel permeation chromatography chemistry.chemical_compound Sulfation chemistry Yield (chemistry) 0202 electrical engineering electronic engineering information engineering Sulfamic acid Organic chemistry Lignin Molar mass distribution 0105 earth and related environmental sciences |
| Zdroj: | Biomass Conversion and Biorefinery. 12:1229-1236 |
| ISSN: | 2190-6823 2190-6815 |
| DOI: | 10.1007/s13399-020-00706-0 |
| Popis: | 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 lignin sulfates was studied. It was shown that the reaction of ethanol lignin sulfation begins and ends in a homogeneous medium. At temperature 100 °C, the sulfur content in lignin varies from 5.4 to 6.8% mass, depending on the process time. The introduction of sulfate groups into the lignin structure was confirmed by FTIR and 2D NMR spectroscopy. It was found that both alcohol and phenolic hydroxyl groups of lignin enter the sulfation reaction. The molecular weight distribution of sulfated ethanol lignin was determined by gel permeation chromatography. The optimized method of synthesis allows to obtain sulfated ethanol lignin with low polydispersity (1.31) and narrow molecular weight distribution (3.25–3.75 kDa). |
| Databáze: | OpenAIRE |
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