METHOD OF DESTROYING WATER-OIL TRAPPED EMULSION Russian patent published in 2005 - IPC

FIELD: crude oil treatment.

SUBSTANCE: polymer-containing trapped emulsion is pumped from earthen container into settler containing fresh industrial water to obtain emulsion-to-water volume ratio 1:2. Resulting mix is heated via circulation through heat-exchange to 70-80°C while simultaneously receiving demulsifier in amount 20-50% of its estimated amount and aqueous solution of active chlorine-releasing compound in amount corresponding to 0.2-0.4 kg active chlorine per 1 m³ trapped emulsion. Hot trapped emulsion is then pulped to section of dispersers disposed in tubes supplying fresh industrial water preheated to 40-50°C while simultaneously feeding the rest of demulsifier to pump pumping trapped emulsion observing emulsion-to-water volume ratio (1-2):9. Dispersing cycle is repeated at least twice while draining after each cycle separated water. Finally, inverted emulsion is settled to residual water content 1%.

EFFECT: increased emulsion destruction efficiency due to increased degree of oil dehydration and lowered concentration of suspended impurities.

2 ex