The research and application of the chemical demulsification, biological demulsification, physical demulsification and cooperation of different demulsification methods were reviewed. The physical demulsification methods included centrifugation demulsification, gravity demulsification, thermal demulsification, freeze and thaw demulsification, filter demulsification, grinding demulsification,
... [Show full abstract] membrane demulsification, membrane wetting coalescence demulsification, ultrasonic demulsification, microwave demulsification, electrolyte demulsifying method, electrical demulsification method, water hammer harmonic demulsification, and so on. The focuses of this study on demulsification were summarized and the prospects of the demulsification study were conducted. It's also indicated that developing high efficient, environmentally friendly demulsifiers and demulsification methods would be the main stream in the future work.