Study on Preparation and Performance of Demulsifiers with Purification Water Property at Low Temperature

In order to solve the problem that crude oil at low temperature is difficult to demulsify,a complex demulsifier with purification water property at low temperature was synthesized.ARB-01 demulsifier with star-shaped structure was a kind of poly(ethylene oxide)-poly(propylene oxide) block-copolymer with using polyamine as starting agent.PJN-01 was a high efficient cation flocculant which was synthesized by the reaction between amine and epichlorohydrin.CP903DW was prepared through complexing ARB-01 demulsifier and PJN-01 flocculant.It could increase the demulsification efficiency and enhance the speed of dewatering compared with other demulsifiers in the field.