月桂醇聚氧乙烯醚(7)仲辛基磺基琥珀酸混合双酯钠的合成与性能  

SYNTHESIS AND PROPERTIES OF SODIUM LAURYL POLYOXYETHENE(7) 1-METHYLHEPTYL SULFOSUCCINATE

作　　者：华平[1] 李建华[1] 戴宝江[2] 唐君琴[1] 

机构地区：[1]南通大学化学化工学院,江苏南通226007 [2]南通江山农药化工股份有限公司,江苏南通226006

出　　处：《精细石油化工》2008年第3期13-17,共5页Speciality Petrochemicals

基　　金：“十一五”国家科技支撑计划重大项目(2006BAE01A07-09);江苏省高校自然科学指导性计划项目(06KJD530155)

摘　　要：采用控制酯化率和非外加相转移催化剂的方法,在敞开体系中合成了月桂醇聚氧乙烯醚(7)仲辛基磺基琥珀酸混合双酯钠。最佳工艺条件为:n[月桂醇聚氧乙烯醚(7)]:n(马来酸酐)=1.00:1.10,于140℃单酯化反应2.5 h,得到单酯化率为99.8%的单酯化产物;n(仲辛醇):n(马来酸酐)=4.0:1.0,加热介质温度为220℃,双酯化反应3.5 h,得到双酯化率为94.96%的双酯化产物。n(亚硫酸氢钠):n(马来酸酐)=1.10: 1.00,加热介质温度为190℃,磺化反应4.5 h,产物的表面张力为30.9 mN/m、临界胶束浓度为1.26×10^(-4) mol/L、乳化力为4.46 min、渗透力为3.35 s、分散力为91.85%、去油污力为98.93%。与磺基琥珀酸二辛酯钠盐(快T)和月桂醇聚氧乙烯醚(7)磺基琥珀酸单酯二钠盐(LESS)进行性能对比,产物分散力、去油污性能较快T均得到了改善;与LESS相比,渗透性能得到了较大的提高。Sodium lauryl polyoxyethene （7） 1-methylheptyl sulfosuccinate was synthesized by controlling esterification extent in an open system without addition of any phase transfer catalyst. Under the optimum conditions, i. e. , lauryl polyoxyethene（7） and maleic anhydride in molar ratio 1.00 ： 1.10 at 140 ℃ for 2.5 h, the monoester was obtained with 99.8% yield. Diesterfication was obtained with 94.96% yield at the heating medium temperature of 220 ℃ for 3.5 h with 2-octanol （methylheptyl） ：maleic anhydride in molar ratio of 4.0. Sulfonation was carried out in a heating medium temperature of 190 ℃ for 4.5 h with sodium hydrosulfite ： maleic anhydride in molar ratio of 1.10 ： 1.00. The obtained product had the following properties： surface tension 30.9 mN/m, critical micelle concentration 1. 26 × 10^-4 mol/L, emulsifying power 4. 46 min, dispersing power 91. 85%, de-oiling power 98.93 %. Compared with the conventional sodium octyl sulfosuccinate, disodium lauryl polyoxyethene （7） 1-methylheptyl sulfosuccinate had superior dispersing power, de-oiling power and permeability.

关 键 词：月桂醇聚氧乙烯醚(7)仲辛基磺基琥珀酸混合双酯钠 磺基琥珀酸混合双酯钠 阴离子表面活性剂 非离子表面活性剂 月桂醇聚氧乙烯醚 马来酸酐 

分 类 号：TQ423.11[化学工程]