METHOD OF A COMPLEX PROCESSING OF LARCH Russian patent published in 2005 - IPC

FIELD: chemical-pharmaceutical industry; food industry; fragrance industry; method of a complex processing of a larch.

SUBSTANCE: the invention is pertinent to the method of a complex processing of a larch ensuring production of a bioflavonoid complex containing 90.0-98.0 mass % of dihydroquercitin and accompanying flavonoids, and polysaccharides, which may find usage in chemical-pharmaceutical industry, food industry; fragrance industry. The method of a complex processing of larch is realized by extraction of a crushed wood with the subsequent evaporation of then extract, settling of a bioflavonoid complex at presence of water-soluble salts. Extraction of the crushed wood is conducted using isopropyl alcohol or ether-spirit mixture containing 50-80 mass % of acetic ester selected from An acetic ester sampled from ethyl-, propyl- or butyl acetate, 20-50 mass % alcohol selected from a group including ethyl alcohol, propyl alcohol, isopropyl or butyl alcohols. Separate the crushed wood from the extracting solution and settling of the bioflavonoid complex with simultaneous separation of a native pitch is conducted at presence of the water-soluble salts selected from a group including_{Li2SO4,(NH4)2SO4, NH4Cl, NaCl,MgSO4, CaCl2,K2SO4, Na2SO4, or their mixtures, with the subsequent filtration of the produced bioflavonoid complex with usage of fibrous filters. The method ensures separation of the bioflavonoid complex containing 90.0-98.0 mass % of dihydroquercitin, considerably simplifies the technological process, decreases power input, excludes the cost intensive sorbents from the production process and considerably reduces a time of production the target product.}

EFFECT: the invention ensures separation of the bioflavonoid complex, considerably simplifies the production process, decreases power input and a time of production the target product excluding expensive sorbents.

10 cl, 6 ex