METHOD OF ENHANCING EFFICIENCY OF WATER-OIL EMULSION DEMULSIFIERS Russian patent published in 2008 - IPC C10G33/04 C08G18/48 

FIELD: crude water treatment.

SUBSTANCE: invention, in particular, relates to water-oil emulsion demulsifiers for treatment of crude oil before refining. Method of enhancing efficiency of commercial forms of demulsifiers is implemented by preparing said commercial forms using binary solvent consisting of a hydrocarbon and an alcohol soluble therein. Optimal concentration of alcohol and active part of a reagent in the solvent ensure formation in crude oil of critical emulsion with coacervate phase of high-molecular weight compounds contained in demulsifier. Optimal composition of solvent and presence of active part in the commercial form of given reagent corresponds with maximum optical density of that commercial form in hexane. In this case, demulsification efficiency is enhanced owing to extraction of naturally occurring emulsifiers contained in crude oil by coacervate phase of demulsifier.

EFFECT: enhanced demulsification capacity of commercial forms of demulsifiers due to transfer thereof in hydrocarbon into state of critical emulsion.

5 dwg