METHOD OF SOIL RECOVERY CONTAMINATED WITH OIL 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 oil-containing soil recovery includes introduction of calcium oxide, water and sorbent into soil. Sorbent used is a product of reaction of animal fat with an aqueous solution of sodium hydroxide while heating, followed by introduction of calcium chloride into the solution and extraction of dried anhydrous crystals. Soil restoration process is carried out at the following ratio of components: soil:oil:sorbent:CaO = 10:(1.0÷2.0):(0.3÷-2):(0.05÷0.15).

EFFECT: simplified recovery of oil-bearing soil with extraction of product with low hydrophobicity.

1 cl, 3 tbl, 1 ex