FIELD: chemistry.
SUBSTANCE: production of oxidized lignin by electrochemical modification of hydrolytic lignin in aqueous acid electrolyte on carbon electrodes at ambient temperature. The method is characterized in that the modification of lignin is carried out in a solution of HF containing 2-3 wt % of lignin in the presence of ammonium fluoride or potassium fluoride in an amount of 10-30 wt %, with electrolysis being carried out in the galvanostatic mode at a current density of i = 0.2-0.4 A/cm2 for 0.25-1 hours.
EFFECT: preparations of lignin with the content of carboxyl groups from 20 to 40 percent depending on the synthesis time.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD TO MODIFY TITANIUM SURFACE | 2012 |
|
RU2516142C2 |
| METHOD OF PREPARING SILYLATED LIGNIN | 1999 |
|
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| METHOD OF PRODUCING VANILLIN ELECTROCHEMICAL OXIDATION OF AQUEOUS SOLUTIONS OR SUSPENSIONS LIGNIN | 2012 |
|
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| METHOD OF ELECTROCHEMICAL PRODUCTION OF COMPACT LAYERS OF METALLIC RHENIUM | 2017 |
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| METHOD OF PRODUCING 9-MESITYL-10-METHYL ACRIDINIUM SALT | 2015 |
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| METHOD OF ELECTROCHEMICAL OXIDATION OF ALCOHOLS TO NITRILES | 2020 |
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| ELECTROCHEMICAL METHOD OF PRODUCING HALOGENATED COMPOUND CONTAINING CARBONYL GROUP | 2007 |
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| METHOD FOR OBTAINING COMPOSITIONS OF TUNGSTEN CARBIDE WITH PLATINUM | 2011 |
|
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| METHOD FOR ELECTROCHEMICAL OXIDATION OF ALCOHOLS INTO NITRILES | 2021 |
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| METHOD FOR PRODUCING AN ELECTROLYTE FOR A VANADIUM FLOW REDOX BATTERY | 2022 |
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