Demulsifiers And A Method Of Using Demulsifiers For Breaking Emulsions Of Water And Crude Oil

摘要

This invention provides a concentrated demulsifier composition comprisingA) at least 50 wt.-% of a demulsifier, selected from the group consisting of a polymeric nonionic oil-soluble demulsifier for mineral oils, and an alkyl aryl sulphonic acid or its salt, and mixtures thereof,B) 0.1 to 20 wt.-% of a surfactant selected form anionic, cationic, zwitterionic and nonionic surfactants, the surfactant being different from the demulsifier,C) less than 20 wt.-% of a water-immiscible organic solvent,D) 3 to 49 wt.-% of a water-miscible organic solvent andE) 0 to 5 wt.-% of water.