月桂醇磺基琥珀酸单酯钠二乙醇胺盐的合成工艺及性能研究

SYNTHESIS PROCESS AND PERFORMANCE STUDY OF LAURYL SULFOSUCCINATE MONOESTER SODIUM DIETHANOLAMINE SALT

利用月桂醇和马来酸酐为原料,在磺化剂亚硫酸盐中引入铵根离子代替钠离子,经酯化、磺化,合成月桂醇磺基琥珀酸单酯钠二乙醇胺盐。通过单因素实验与正交实验得出最佳工艺条件为:n(马来酸酐)∶n(月桂醇)为1.05∶1,n(马来酸酐)∶n(亚硫酸氢钠)为1∶1.03,酯化和磺化反应温度分别为65℃和82.5℃,酯化和磺化反应时间均为2.25 h,此条件下的酯化率和磺化率分别可达到96.89%和93.74%。通过与几种常用表面活性剂进行理化性能检测对比,结果显示:该产品的表面张力为37.16 mN/m,临界胶束浓度为0.044 g/L,乳化分水时间为5.16 min,5 min内的发泡高度为13.94~14.60 cm,泡沫稳定性为95.5%,LSDP(钙皂分散性能)值为111.52,与其他常用的表面活性剂相比,该产品的表面活性性能优良。

Using lauryl alcohol and maleic anhydride as raw materials, ammonium ions are introduced into the sulfonating agent sulfite instead of sodium ions, esterification and sulfonation are carried out to synthesize sodium lauryl sulfosuccinate monoethanolamine diethanolamine salt. The optimum conditions were obtained by single factor experiment and orthogonal experiment: n(maleic anhydride)∶n(lauryl alcohol) was 1.05∶1, n(maleic anhydride)∶n(sodium hydrogen sulfite) was 1∶1.03, the esterification and sulfonation temperatures were 65 ℃ and 82.5 ℃, respectively. The esterification and sulfonation reaction time were 2.25 h. The esterification rate and sulfonation rate under these conditions were 96.89% and 93.74%, respectively. Compared with several common surfactants, the results showed that the surface tension of the product was 37.16 mN/m, the critical micelle concentration was 0.044 g/L, and the emulsification water separation time was 5.16 min. The foaming height is 13.94 to 14.60 cm, the foam stability is 95.5%, and the LSDP(calcium soap dispersion property) value is 111.52. Compared with other commonly used surfactants, the surface activity of the product is excellent.