异辛基正丁基琥珀酸双酯磺酸钠的合成

以异辛醇、马来酸酐、正丁醇和亚硫酸氢钠为原料,通过单酯化、双酯化和磺化反应合成了标题化合物,通过FT-IR表征了产物的结构。对各步反应的条件进行了考察。异辛醇与马来酸酐单酯化反应的适宜条件为:n(马来酸酐)∶n(异辛醇)=1.05,反应温度80℃,反应时间90 min;异辛醇马来酸单酯与正丁醇双酯化反应的适宜条件为:n(正丁醇)∶n(异辛醇马来酸单酯)=1.5,催化剂对甲苯磺酸的用量(基于总反应物的质量)为0.20%,反应温度130℃,反应时间150 min;异辛基正丁基马来酸双酯与亚硫酸氢钠磺化反应的适宜条件为:n(亚硫酸氢钠)∶n(异辛基正丁基马来酸双酯)=1.1,反应时间150 min,反应温度95℃。在此优化反应条件下,异辛基正丁基琥珀酸双酯磺酸钠盐的总收率为91.38%。

Synthesis of sodium iso-octyl n-butyl sulfosuccinate

Sodium iso-octyl n-butyl sulfosuccinate was synthesized via monoesterification,diesterification and sulfonation reactions using iso-octanol,maleic anhydride,n-butanol and sodium bisulfite as starting materials.Its structure was characterized by means of FT-IR spectroscopy.The effects of reaction conditions on monoesterification,diesterification and sulfonation were studied.The optimum conditions for monoesterification between iso-octanol and maleic anhydride were:a mole ratio of maleic anhydride to iso-octanol at 1.05,a reaction temperature of 80 ℃ and a reaction time of 90 min.The optimum conditions for diesterification between iso-octanol maleic monoester and n-butanol were:a mole ratio of n-butanol to iso-octanol maleic monoester at 1.5,a p-toluenesulfonic acid catalyst mass fraction of 0.20%(based on total mass of reaction materials),a reaction temperature of 130 ℃ and a reaction time of 150 min.The optimum conditions for sulfonation between NaHSO_3 and iso-octyl n-butyl maleate were:a mole ratio of NaHSO_3 to iso-octyl n-butyl maleate at 1.1,a reaction temperature of 95 ℃ and a reaction time of 150 min.The overall yield of sodium iso-octyl n-butyl sulfosuccinate was around 91.38% obtained under the optimized reaction conditions.