METHOD FOR OIL SLUDGE DECONTAMINATION Russian patent published in 2014 - IPC C02F1/28 C02F1/00 B09B3/00 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the method for oil sludge decontamination; it can be used in technology of integrated processing for oil-containing wastes and soils formed, in particular, in result of operation of oil-trunk pipelines. The method for oil sludge decontamination includes receipt of decontaminating compound by removal from oil sludge of heavy fraction containing high-molecular hydrocarbons, mixing of the above fraction with the reagent based on oxides of alkali-earth metals, performance of exothermal reaction with receipt of granules containing high-molecular hydrocarbons and use of the above granules for filtration of water fraction from oil sludge with further decontamination. Granules of decontaminating compound are obtained with high content of high-molecular hydrocarbons in quantity of at least 15-25 wt %; for filtration of water fraction from oil sludge the above granules are used in a mixture with an expanded-clay aggregate; thereafter the granules contaminated after filtration and mixed with the expanded-clay aggregate and remaining fractions of oil sludge are mixed with the reagent based on oxides of alkali-earth metals and reactions of hydratation and carbonisation are performed with receipt of the decontaminated product.

EFFECT: improving productivity of filtration process by 15-20%, providing higher bearing force of the final product when using it as construction material, coefficient of sorbent end capacity is equal to 1,2-1,4.

8 cl, 1 tbl, 1 ex