Abstract
Resin and asphaltene were extracted from Gudao and Liaohe heavy oil by using the adsorption chromatography. Toluene and n-dodecane were selected as model oil, sodium dodecylbenzene sulfonate was selected as emulsifier. The interfacial tension (IFT) was investigated without emulsifier and adding emulsifier, the effect of pH value on the interfacial tension was also investigated. The results show that the interaction between component and emulsifier lies on the interfacial activity of components, and the higher interfacial activity is, the stronger interaction is. And the influence of pH on IFT is great at acid and base conditions, but little at neutral condition. The synergetic effect between polar component and emulsifier is stronger in the neutral condition and weak acid and base conditions.
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