METHOD FOR INTEGRATED PROCESSING OF LARCHWOOD Russian patent published in 2015 - IPC C09F1/00 C08B37/00 C07D311/32 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and can be used in integrated processing of wood. The method for integrated processing of larchwood includes breaking down crushed wood material in a rotary-oscillatory apparatus in three steps, where at the first step the wood raw material is treated with an aliphatic alcohol at 58-60°C, followed by cooling to 30°C and separating the obtained pulp into a liquid phase and a solid phase. The aliphatic alcohol is distilled from the liquid phase. The thick residue is extracted with hexane, filtered to obtain a solid component and a liquid component; hexane is distilled from the liquid component and evaporated at low pressure to obtain wood oil. The solid component is extracted with methyl-tert-butyl ether to obtain a filtrate and wood resin; the filtrate is evaporated in a vacuum, dissolved in deionised water, crystallised, filtered and dried to obtain dihydroquercetin. The solid phase is treated with water in the rotary-oscillatory apparatus at 90-95°C for 12-3 minutes, separated to obtain a wood mass and a filtrate which is precipitated with an alcohol, filtered and dried to obtain arabinogalactan. The obtained wood mass is treated in the rotary-oscillatory apparatus while adding an aqueous emulsion of latex at 50°C for 2-3 minutes to obtain a modified wood biopolymer.

EFFECT: invention provides fuller processing of larchwood to obtain arabinogalactan, dihydroquercetin, wood oil and resin, as well as a modified wood mass using an affordable process scheme and extract wood products of high quality.

6 cl, 2 dwg, 2 ex