METHOD OF OIL SPILL LIQUIDATION IN CONDITIONS OF WEAK NATURAL DISTURBANCE OR ITS COMPLETE ABSENCE Russian patent published in 2023 - IPC C09K3/32 C09K23/00 E02B15/04 

FIELD: environmental protection.

SUBSTANCE: invention relates to the cleaning of the surface of water areas from oil spills by chemical treatment, in particular by chemical dispersion in various climatic regions, especially under conditions of weak natural disturbance or its complete absence. A method of oil spill response is disclosed, including under conditions of weak natural disturbance or its complete absence. The method consists in applying a dispersant to the oil slick from water or aeronautical vehicles. The dispersant comprises sorbitan monooleate 10-15 wt.%, polyoxyethylene sorbitan monooleate 15-20 wt.%, sodium dioctylsulfosuccinate 15-25 wt.%, an inorganic additive selected from the series: sodium salts of boric acid, sodium salts of phosphoric acid, sodium salts of acetic acid 0.1-1 wt.%, solvent up to 100 wt.%. The composition of the solvent includes glycols and their ethers, preferably propylene glycol, butyl carbitol and ethyl carbitol, in a mass ratio of 1:1:1, water and liquid petroleum paraffins in a mass ratio of from 1:2 to 3:2. In addition, inorganic salts are introduced into the dispersant formulation in such a way that the pH value of a 1% aqueous dispersant solution is from 6.0 to 8.5 in the water temperature range from 10 to 30°C and its salinity from 5 to 30‰. The dispersant is applied using spray devices that provide the formation of dispersant droplets with a size of 0.4-0.7 mm, while mixing the dispersant/oil/water system with the propellers of swimming facilities at a propeller shaft rotation speed of 400 to 1000 rpm.

EFFECT: increased efficiency of the oil spill response process under conditions of weak natural disturbance or its complete absence and reduced specific consumption of the dispersant used at different temperatures (10-30°C) and salinity (5-30‰) of water.

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