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

摘要： 采用硅胶柱层析法将两种石油磺酸盐分别分离成不同极性组分,在加醇和无醇条件下考察了石油磺酸盐不同极性组分及其复配体系的相行为和超低界面张力.将不同极性组分按一定比例复配,在加醇条件下可形成中相微乳液,且可获得较高的增溶参数和超低界面张力.在无醇条件下,石油磺酸盐单独组分均不能形成中相微乳液,合理复配两种或三种不同极性组分,不但可以形成中相微乳液且可获得较高的增溶参数和超低界面张力,相行为参数随复配比例的变化而变化.在上述实验的基础上提出石油磺酸盐是由不同极性组分组成的复杂表面活性剂,其不同极性组分间存在协同效应,极性在协同效应中起着重要作用.建议根据不同极性组成比例来监控石油磺酸盐产品质量.

关键词: 石油, 磺酸盐, 阴离子, 表面活性剂, 微乳化液, 协同效应