METHOD FOR NEUTRALISATION AND DISPOSAL OF OIL-CONTAINING SLUDGE Russian patent published in 2017 - IPC B09B3/00 

FIELD: oil and gas industry.

SUBSTANCE: method comprises mixing quicklime with oil-containing sludge and a surfactant, then lime slaking is carried out by adding of water in volume required for complete lime slacking, neutralisation sorbents are added after lime slaking followed by the final mixing, at that, an agent imparting hydrophobic properties is used as a surfactant, and used silica gel is used as neutralizing sorbents, which is a waste from natural gas drying plants, and a spent zeolite which is waste from the gas desulfurization plants. Mixing is carried out at the following percentage ratio of components, wt %: oil-containing sludge -40-60; quicklime - 29-33; surfactant 0.3-0.5; used silica gel - 9.2-18.5; used zeolite 1.5-8.

EFFECT: improved environmental and economic efficiency of neutralisation and disposal of oil-containing sludge.

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