Siberian Federal University

The processes of catalytic hydrolysis of hemicelluloses of pine wood at temperatures of 100-150 °C were studied. The dissolved mineral acids H2SO4 and HCl, as well as the solid acid catalysts Amberlyst–15, acid-modified SBA-15 and Sibunit-4 were used as the hydrolysis catalysts. It was established that the maximum yield of monosaccharides (96,0 % wt. from the initial content of hemicelluloses in pine wood) is achieved at temperature of 100 °C in the presence of catalyst 2 % wt. HCl with a hydrolysis time of 4 h. The yield is reduced in the series of catalysts: HCl (100 °C) > SBA–15 (150 °C) > Amberlyst–15 (150 °C) > H2SO4 (100 °C) > Sibunit–4 (150 °C) > without catalyst (150 °C). The lignocellulosic products formed during the hydrolysis of pine wood contain 51.0 – 55.5 % wt. of cellulose, 29.2 – 36.7 % wt. of lignin and 1.8 to 11.7 % wt. of hemicelluloses. The composition and structure of soluble and solid products of acid hydrolysis of pine wood are studied by gas chromatography, X-ray diffraction and chemical methods