OILY WASTE TREATMENT METHOD Russian patent published in 2015 - IPC A62D3/33 A62D101/20 B09B3/00 C08J11/00 

FIELD: oil and gas industry.

SUBSTANCE: method includes the mixing of oily wastes with the neutralizing composition containing the grinded to finely dispersed state caustic lime (calcium oxide) amounting 67-91 wt % and used silica gel - 9-33 wt %, that is waste from the unit for gas conditioning before transportation with the subsequent adding of calculated amount of water, reacting with quicklime, the required amount of which is identified in view of water contained in the oily waste, and water sorption of used silica gel. Before mixing the oily wastes while heating up to 60-70°C within 5-10 minutes are mixed with filtering and absorbing used masses formed at the stage of winterization of process of refining of vegetable oil in the ratio 1:(0.05-0.2), then into the obtained mixture a neutralizing composition is added by portions in the ratio 1:(0.67-1.14) with mixing using a mechanical agitator at a rate of 100-110 rpm and temperature increase from 99 up to 144°C within 10-15 minutes until forming of uniform hydrophobic free-flowing finely dispersed powder.

EFFECT: increase of hydrophobicity of the product of waste treatment and decrease of concentration of harmful matters in a water extraction from the product of treatment.

2 cl, 1 tbl, 7 ex