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

FIELD: environmental protection.

SUBSTANCE: invention relates to the field of environmental protection, in particular to technological processes of utilization of oil-containing wastes – oil sludges (OS), and can be used in industry related to storage, transportation and processing of oil and oil products. Technical problem is creation of efficient, easy-to-process and cheap method of oil-containing soil recovery with production of environmentally safe product. Process of oil-containing soil recovery with extraction of hydrophilic and neutral soil is performed by adding calcium oxide (CaO), water concentrate of sodium silicate (Na₂SiO₃) (liquid glass – LG) and phosphoric acid (H₃PO₄) into soil in following ratio of components: 1:0.3:0.6:1.0<Oil:CaO:LG:H₃PO₄<1:0.4:0.7:1.2.

EFFECT: simplification, reduction of cost of process of oil-containing soil recovery with extraction of hydrophilic and neutral soil.

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