METHOD OF ISOLATION OF SHILAGIT-LIKE SUBSTANCE FROM THE NATURAL RAW Russian patent published in 1994 - IPC

FIELD: technology of preparing and purification of shilagit. SUBSTANCE: shilagit-like substances are prepared from the natural raw by grinding and extraction with water at 40-50 C, filtration, evaporation up to concentration 27-33% , repeated filtration and drying. After repeated filtration solution can be subjected for ultrafiltration up to preparing of the end product with mol. mass 40 kDa, not more. Ash content of products is by 17-35% lower as compared with that in product preparing by known methods. EFFECT: improved method of shilagit-like substance preparing. 1 tbl