METHOD OF OIL ISOLATION IN SOIL BY CHEMICAL TREATMENT Russian patent published in 2020 - IPC B09C1/08 

FIELD: environmental protection.

SUBSTANCE: invention relates to the field of environmental protection, in particular, to processes of utilization of oil-containing wastes (sludges). Invention relates to a method of isolating oil in soil by chemical treatment by adding thereto an acidic agent – aluminum sulphate (SA), and an alkaline agent, which form a water-insoluble compound in a wet matrix, in which the process is carried out by adding of emulsifier to the soil contaminated with oil – calcium stearate (StCa), calcium carbonate (CaCO₃) as an alkaline agent and aluminum sulphate (SA) as an acidic agent in weight ratio: 1.0 : 0.5 : 0.9 : 2.0 ≤ Oil : StCa : CaCO₃ : SA ≤ 1.0 : 0.75 : 1.8 : 4.0.

EFFECT: simplification and improvement of the process of oil-containing soil recovery with extraction of hydrophilic and neutral soil.

1 cl, 2 tbl, 11 ex