FILTERING SORBENT FOR PURIFICATION OF WATER FROM PETROLEUM PRODUCTS Russian patent published in 1995 - IPC

FIELD: water purification. SUBSTANCE: sorbent contains bitumen and organic combustible material whose one part has structure of lumpy material while the other part has structure of powdery material. Total volumetric content of bitumen and powdery material amounts to 10-40% and volumetric content of bitumen amounts to 15-80% of total volume of bitumen and powdery material. Powdery material may be used in form of dusty fuel, coal, shale or heat dust, or wood flour. EFFECT: higher efficiency. 2 cl, 1 tbl