METHOD FOR OIL-CONTAINING SOIL RECOVERY BY CHEMICAL TREATMENT Russian patent published in 2019 - IPC B09C1/08 

FIELD: chemistry.

SUBSTANCE: invention relates to the field of environmental protection, in particular to technological processes of utilization of oil-containing wastes. Method of soil recovery contaminated with oil mixing soil with calcium oxide, water and acidic agent, forming with calcium oxide water-insoluble compound. Process of oil-containing soil recovery with extraction of hydrophilic soil with preset pH values is ensured by adding to soil calcium oxide and oxalic acid (C₂H₂O₄*H₂O) with the following ratio of components: 1:0.67:2.1 < Oil:CaO:C₂H₂O₄*2H₂O < 1:1.33:2.2.

EFFECT: creation of effective, simple in technological execution and cheap method of oil-containing soil recovery with production of environmentally safe product.

1 cl, 2 tbl, 9 ex