Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

PP-32STUDY OF PRODUCTS OF LIGNOCELLULOSIC RAW MATERIALSCATALYTIC OXIDATION BY HYDROGEN PEROXIDEKuznetsova S.A. 1,2 , Kuznetsov B.N. 1,2 , Danilov V.G. 1 , Petrov A.V. 11 Institute of Chemistry and Chemical Technology SB RAS,K. Marx str., 42, Krasnoyarsk, 660049, fax: +7(391)2439342, e-mail: inm@icct.ru2 Siberian Federal University, Svobodny pr., 79, Krasnoyarsk, 660041Promising directions of plant biomass wasteless processing are based on theconversion of two main components of biomass – polysaccharides and lignin tovaluable products. The preliminary separation of lignocellulosic materials intocellulose and lignin makes it possible to increase the efficiency of biomass chemicalprocessing. Method of catalytic oxidative depolymerization of plant lignin withhydrogen peroxide was used for biomass separation.The present communication describes results obtained on the area of oxidation oflignocellulosic materials (sawdust of deciduous and coniferous wood, wheat straw,oats husk) by hydrogen peroxide in the medium acetic acid – water in the presenceof acidic and oxidative-reductive catalysts.Products of catalytic oxidation of biomass at 100-200 °C are presented by solidcellulose, low-molecular lignin and water soluble organic compounds. Theircomposition and structure were studied by chemical analysis, FTIR, NMR H 1 andC 13 , C.M.-G.C, XRD methods.The optimal conditions of oxidation were selected for different types of biomassand catalysts. They make it possible to combine the stages of lignin oxidativedepolymerization and acidic hydrolysis of hemicelluloses and amorphous cellulose.This allows to produce the microcrystalline cellulose (MCC) from different types oflignicellulosic raw materials by one-stage process.The possible areas of application of microcrystalline cellulose and low molecularlignin, obtained by catalytic oxidation of plant biomass were studied. Microcrystallinecellulose can be used instead of MCC from cotton for obtaining food fibers andbiologically active sulphates of MCC. Low molecular lignin is applicable for producingvarious valuable products: enterosorbents, binding agents for wood panels, liquidbiofuels and nanoporous active carbons.121