METHOD OF THE LARCH BARK COMPLEX PROCESSING Russian patent published in 2018 - IPC A61K36/15 B01D11/02 A61K129/00 

FIELD: woodworking industry.

SUBSTANCE: invention relates to the wood waste chemical processing, in particular, to the larch bark complex processing to obtain valuable chemical products. Method of the Siberian larch bark complex processing, which includes the bark crushing, extraction by the hexane nonpolar solvent with the coniferous wax separation followed by the solid residue processing, is characterized in that as the extractant the non-polar solvent is used, selected from the pentane, hexane, petroleum ether, BR-1 gasoline, at that, the extraction is carried out at the solvent boiling point, and the bark residue is treated with the alcohol-water-alkaline solution containing 0.2 % by weight of alkali and 20 % by weight of ethyl alcohol, at a temperature of 90–95 °C for 90 minutes, filtering the hot mixture, the aqueous alcohol mixture is distilled from the filtrate with the polyphenols deposition, which are dissolved in water under the hydro module of 4, adding the 40 % by weight aqueous formaldehyde solution and holding at a temperature of 85 °C for 5 days, placing the formed gel in the ethyl alcohol and holding for 3 days to replace water with the alcohol phase, drying for 7 days at room temperature with production of the organic aerogels, and after the polyphenols extraction the bark solid residue is washed with water and drying until the air-dry state to produce enterosorbents.

EFFECT: above method is effective for the Siberian larch bark complex processing with production of valuable chemical products, coniferous wax, organic aerogels and enterosorbents, is environmentally safe and cost efficient.

1 cl, 1 dwg, 1 tbl, 1 ex