Abstract: Dialkybenzene sulfonates were prepared as follows. First，dialkybenzenes were prepared from alkybenzene and α-olefin with MCM-22 as catalyst. Second，dialkybenzene sulfonic acid was prepared from dialkybenzenes and chlorosulfonic acid. Then，dialkybenzene sulfonic acid was neutralized with NaOH to obtain dialkybenzene sulfonates. The optimum molar ratio of reactants (alkybenzene∶α-olefin = 4∶1) and sulfonation conditions (30℃，60min) were obtained. The performance of dialkybenzene sulfonates C12-6，C12-10，C12-14 were investigated，and their foaming properties，emulsification，wettability，critical micelle concentration，interfacial tensions were analyzed.

摘要： 分3步合成了双烷基苯磺酸钠：分子筛 MCM-22催化α-烯烃与烷基苯合成双烷基苯磺酸；双烷基苯与氯磺酸反应生成双烷基苯磺酸；双烷基苯磺酸与NaOH中和反应生成双烷基苯磺酸钠。得到了最佳反应体系物质的量比n（烷基苯）∶n（α-烯烃）=4∶1，磺化反应条件30 ℃，60 min。并对合成的双烷基苯磺酸钠C12-6、C12-10、C12-14进行张力性能测试，分析了这3种不同链长双尾形表面活性剂的起泡力和稳泡力、乳化性能、润湿性能、临界胶束浓度以及弱碱条件下油水界面张力性能差异。