关键词: 石油, 磺酸盐, 阴离子, 表面活性剂, 微乳化液, 协同效应

Abstract: Two kinds of petroleum sulfonates were separated into different polar fractions by means of silica gel column.Phase behavior of different polar fractions and their blends have been studied.Blending different polar fractions at some appropriate proportions,however,do give middle phase microemulsion systems with high solubilization parameters and ultra-low interfacial tension on alcohol condition.Fractions alone of petroleum surfonate could not form middle phase microemulsion on alcohol-free condition.Blending at some appropriate proportions,blends of two or three fractions of petroleum sulfonate can not only form middle phase microemulsion but also reveal.High solubilization ratio and ultra-low interfacial tension at optimum salinity under alcoholfree condition.Parameters of phase behavior changed when the proportion of fractions changed.Experiment results indicate that petroleum sulfonates are themselves multicomponent surfactant that composed of different polar fractions.There are synergism among different polar fractions,polarity is important in synergism.It is suggested that the quality of petroleum sulfonale is supervised by the copmposition of different polar fractions.

Key words: petroleum, sulfonate, anion, surfactant, microemulsion, synergism