Method of treating an aqueous medium conteminated with hydrocarbons and defoaming and dispersant composition sedon polyglycerolesters.

摘要

Treatment of an aqueous medium polluted with petroleum hydrocarbons comprises contacting the petroleum with a solution of a mixture of polyglycerol esters in an amount of at least 50 (200-10,000, especially 500-6000) ppm by weight, to inhibit formation of a water in petroleum oil emulsion and at least partially to break any emulsion that has already formed.