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以双三羟甲基丙烷与正辛酸为原料,对甲基苯磺酸为催化剂,采用酸醇酯化法合成了双三羟甲基丙烷正辛酸酯。考察了反应物投料比、反应时间、催化剂用量等对反应的影响。结果证明,最佳反应条件为:酸醇摩尔比4.4∶1,催化剂用量为双三羟甲基丙烷质量的1.0%,带水剂为双三羟甲基丙烷质量的60%,反应温度为120℃,加热回流4 h。在此工艺条件下,产品颜色浅,产率高达97.28%。并用红外光谱、核磁等方法进行了定性分析。
Using ditrimethylolpropane and n-octanoic acid as raw materials and p-methylbenzenesulfonic acid as catalyst, ditrimethylolpropane n-octanoate was synthesized by acidolysis. The effect of reactant feed ratio, reaction time and amount of catalyst on the reaction was investigated. The results showed that the optimal reaction conditions were as follows: molar ratio of alcohol to alcohol was 4.4:1, the amount of catalyst was 1.0% of ditrimethylolpropane, the amount of diterhyphenol was 60% and the reaction temperature was 120 ℃, heated to reflux for 4 h. Under this process conditions, the product is light in color with a yield of 97.28%. The qualitative analysis was carried out by means of infrared spectroscopy, nuclear magnetic resonance and other methods.