ANALYSIS OF CHEMICAL TRANSFORMATIONS OF LIGNIN IN ALKALINE SOLUTIONS OF MONOSACCHARIDES

  • Ольга Владимировна Лепилова G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya St., 1 Ivanovo, 153045 Email: lov@isc-ras.ru
  • Светлана Владимировна Алеева G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya St., 1 Ivanovo, 153045 Email: sva@isc-ras.ru
  • Сергей Александрович Кокшаров G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya St., 1 Ivanovo, 153045 Email: sva@isc-ras.ru
DOI_disc_logo https://doi.org/10.14258/jcprm.1301047
Keywords: Lignin, reducing processes, differential UV-spectroscopy, monosaccharides

Abstract

The efficiency of chemical transformations in lignin macromolecules of a fur-tree ordinary wood (Picea excelsa) under action galactose, galacturonic acid and xylose was compared with results of use sodium borohydride. By the  method of differential UV-spectroscopy it  was shown that operate of alkaline solutions Gal, GA and Xyl on lignin to decrease in 1,26-2,85 time the intensity of absorption phenyl propane links containing ionic a-carbonyl at l 350 nanometers according to increase of reducing ability of systems; reducing of carbonyl groupings by sodium borohydride in equimolecular concentration to provide the decrease maximum in 5,1 times. At that the increase of peaks at 250 and 300 nanometers testifies about increase in the numbers of structural fragments in the free phenolic form, that in aggregate with increase of ability lignin to sulfonation and peroxide oxidation allows to assume about initiation depolymerisation processes as a result of redox-transformations of unsaturated bonds in propanyl macromolecule links.

The received results have the important scientific and practical value for the intensification peroxide modes of cellulose materials bleaching, both in pulp-and-paper branch, and in the textile industry. The revealed effects was realised in enzyme-peroxide technology of preparation to spinning of difficultly processed grades of a linen fibre with the high content lignin.

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Author Biographies

Ольга Владимировна Лепилова, G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya St., 1 Ivanovo, 153045
научный сотрудник, кандидат технических наук, тел./факс: (4932) 33-62-61
Светлана Владимировна Алеева, G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya St., 1 Ivanovo, 153045
доцент, кандидат технических наук, тел./факс: (4932) 33-62-61
Сергей Александрович Кокшаров, G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya St., 1 Ivanovo, 153045
главный научный сотрудник, доктор технических наук, профессор, тел./факс: (4932) 33-62-61

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Published
2013-03-20
How to Cite
1. Лепилова О. В., Алеева С. В., Кокшаров С. А. ANALYSIS OF CHEMICAL TRANSFORMATIONS OF LIGNIN IN ALKALINE SOLUTIONS OF MONOSACCHARIDES // chemistry of plant raw material, 2013. № 1. P. 47-52. URL: http://journal.asu.ru/cw/article/view/jcprm.1301047.
Issue
No 1 (2013)
Section
Biopolymers of plants

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