METHOD OF CLEANING OIL AND OIL PRODUCT-POLLUTED GROUND Russian patent published in 2002 - IPC

FIELD: oil pollution removal. SUBSTANCE: method consists in mixing polluted ground with preheated water, introducing peroxide compound, stirring the mix, and separating oil pollutant. Distinguishing feature of invention is using, as peroxide compound, sodium peroxosolvate Na₂CO₃•1,5 H₂O₂ in amounts 20 to 50 g per 1 l water and performing mixing operation during 3-5 min. Utilized water is preheated to 70-15 C and water-to-ground ratio is varied from 1: 3 to 1:2. Method is suitable for oil pollutants of various types and various times of being in ground independent of the type of polluted area. EFFECT: simplified cleaning procedure and improved environmental safety. 3 cl, 1 dwg