石油磺酸盐水溶液及其油/水平衡体系  

Solution of Petroleum Sulfonate and its Oil/Water Equilibrated System 

作　　者：陈咏梅[1] 徐峰[1] 张睿 王涵慧[1] 俞稼镛[1] 

机构地区：[1]中国科学院感光化学研究所,北京100101

出　　处：《物理化学学报》1999年第9期789-793,共5页Acta Physico-Chimica Sinica

基　　金：国家攀登(B)计划资助项目

摘　　要：应用ESR法研究了石油磺酸盐水溶液及其油 /水平衡体系中水溶液胶束的形成及其微观性质 .结果表明 ,石油磺酸盐 / 3%正丁醇 / 0 3%氯化钠 /十二烷平衡体系的有效临界胶束浓度 (c )远高于石油磺酸盐在 3%正丁醇、0 3%氯化钠中的临界胶束浓度 (CMC) .Micelle and premicellar solution of petroleum sulfonate and its oil/water equilibrated system have been studied by ESR with nitroxide spin probe.The ESR parameters<A N> decrease at CMC(critical micelle concentration) and c *(efficient critical micelle concentration in water/oil system). Spectral overlapping due to probes in bulk solution and into micelle have been analyzed. The CMC of petroleum sulfonate (YM 3A) in 3%n butanol,0 30%NaCl solution was found to be 0 003%(mass fraction). However, upon equilibration with n dodecane, the c *in the equilibrated aqueous phase was found to be 0 02%～0 05%. It is proposed that upon equilibration with oil, the higher molecular weight species partition preferentially in the oil phase whereas low molecular weight species remain preferentially in the brine phase. Thus, after equilibration with oil, the average weight of surfactant remaining in the aqueous phase is considerable less than the average equivalent weight of the original surfactant.These results give an explanation that c *for SPS upon equilibration with dodecane is higher than CMC.

关 键 词：石油磺酸盐 胶束微环境 ESR 平衡 驱油剂 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]