Preparation of Sulfonic Derivatives of Sulfate Lignin
https://doi.org/10.21266/2079-4304.2026.257.479-493
Abstract
Sulfate lignin is a large-tonnage by-product in the pulp production. It’s mainly used in black liquor recovery boiler in the production of sodium sulfide, and only a small part of it, due to its complex structure, is used in a chemically modified form. Nevertheless, sulfate lignin has the potential to synthesize sought after products with high added value. Unlike sulfate lignin, lignosulfonates, due to their individual physics-chemical properties, are in stable demand due to their use in various industries. However, the production of sulfite cellulose is disproportionately lower than that of sulfate cellulose, and as a result, the total number of commercial lignosulphons does not meet the needs of the market. Thus, there is an ambiguous situation – the underutilization of the potential of sulfate lignin in the synthesis of products with similar properties of lignosulfonates, against the background of an increased demand for lignosulfonates. The study shows the possibility of modifying sulfate lignin. The method of functionalization of the coniferous sulfate lignin structure, including the oxidation of hydroxyl groups with hydrogen peroxide or sodium hypochlorite, and their methylation with dimethyl sulfate, followed by the addition of sodium hydrosulfite to the formed carbonyl groups, made it possible to obtain a product soluble in acidic and neutral media. The obtained soluble lignin is almost identical in its physics-chemical properties to industrial liquid lignosulfonates, which makes it promising for use in similar technological processes.
About the Authors
E. A. Bobkova
Saint Petersburg State University of Industrial Technologies and Design
Russian Federation
Russian Federation
Bobkova Ekaterina A. – Lecturer, Department of Cellulose and Composite Materials Technology, Higher School of Technology and Energetics
198095. Ivana Chernykh str. 4. St. Petersburg
O. V. Fedorova
Saint Petersburg State University of Industrial Technologies and Design
Russian Federation
Russian Federation
Fedorova Olesya V. – PhD (Technical), Associate Professor, Department of Cellulose and Composite Materials, Higher School of Technology and Energetics
Scopus AuthorID: 57190619665
198095. Ivana Chernykh str. 4. St. Petersburg
A. V. Kurzin
Saint Petersburg State University of Industrial Technologies and Design
Russian Federation
Russian Federation
Kurzin Aleksandr V. – PhD (Chemical), Associate Professor, Department of Organic Chemistry, Higher School of Technology and Energetics
Scopus AuthorID: 6602875595
198095. Ivana Chernykh str. 4. St. Petersburg
A. N. Evdokimov
Saint Petersburg State University of Industrial Technologies and Design
Russian Federation
Russian Federation
Evdokimov Andrey N. – PhD (Chemical), Head of the Department of Materials Science and Engineering Technology, Higher School of Technology and Energetics, Associate Professor
Scopus AuthorID: 7006217216. WoS ResearcherID: G-5637-2016
198095. Ivana Chernykh str. 4. St. Petersburg
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Review
For citations:
Bobkova E.A., Fedorova O.V., Kurzin A.V., Evdokimov A.N. Preparation of Sulfonic Derivatives of Sulfate Lignin. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2026;1(257):479-493. (In Russ.) https://doi.org/10.21266/2079-4304.2026.257.479-493
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