Obtaining of Chemicals from Wood of a Birch by Methods of Catalytic Oxidation and Acid Catalysis
B. N. KUZNETSOV1, S. A. KUZNETSOVA2, V. G. DANILOV1 and V. E. TARABANKO1
1Institute of Chemistry and Chemical Technology,
Siberian Branch of the Russian Academy of Sciences,
Ul. K. Marksa 42, Krasnoyarsk 660049 (Russia) E-mail: bnk@icct.ru
2Krasnoyarsk State University, Pr. Svobodny 79, Krasnoyarsk 660049
Pages: 531-539
Abstract
A great amount of hemicelluloses and high density of wood of a birch hinder an application of traditional technologies to process the birch wood into cellulose. Using the catalytic acid transformations and oxidation of carbohydrates and lignin of a birch wood makes possible obtaining a series of valuable organic products. An influence of temperature, of composition of a reaction medium, of liquor ratio, of duration of processes, and of the nature of catalyst on the yield of products of acid prehydrolysis of a birch wood, of its catalytic delignification in acetic acid-hydrogen peroxide medium, and of catalytic oxidation by molecular oxygen under the alkaline conditions have been investigated. Flow diagrams for a comprehensive, environmentally sound processing of a birch wood into xylose, microcrystalline cellulose, levulic acid, vanillin, syringaldehyde, and phenolic matter that make use of the developed processes of catalytic oxidation and acid catalysis have been suggested.
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