Nonionic surfactants based on polyoxyalkylated copolymers used as demulsifying agents

- Physicochemical properties of water-in-crude oil emulsions were studied.
- The effect of the mixture of oil soluble demulsifiers on the water-in-oil (W/O) stability at different temperatures was studied.
- The mixture of two nonionic block copolymers dissolved in kerosene is more efficient for oil emulsion studied in comparison with the mixture dissolved in benzene.
- The result obtained could be useful for formulation of the effective demulsifier composition for the oil emulsions stabilized by asphaltenes and resins.