三羟甲基丙烷油酸酯的制备

Preparation of oleic acid trimethylolpropane easter

以三羟甲基丙烷(TMP)和油酸(OA)为原料、对甲苯磺酸为催化剂,采用减压酯化的方法合成了具有润滑性能的三羟甲基丙烷油酸酯.通过比较酯化率和产品最终颜色探讨了催化剂用量、反应时间及反应温度对反应的影响,得到了合成三羟甲基丙烷油酸酯的优化条件:催化剂用量为总投料量的1%(质量分数),反应温度为150℃,投料酸醇摩尔比OA/TMP=3.0∶1,反应时间为3 h.在此优化条件下,重复试验OA的酯化率均在95%以上,产品的收率均在90%以上.

Oleic acid trimethylolpropane easter with the property of lubrication is synthesized from esterification of oleic acid and trimethylolpropane as the raw material under reduced pressure with p-toluenesulfonic acid（PTSA） as catalyst.Through comparing esterification rate and product colour,the effect factors on the reaction are discussed： amount of catalyst,reaction time and reaction temperature.The optimum conditions are found as follows： amount of PTSA is 1%（mass fraction） based upon mass of total material,the reaction temperature is 150 ℃,n（oleic acid）/n（trimethylolpropane）is 3.0∶1,reaction time is 3 h.Under the optimum conditions,esterification rate of repeated experiment is all above 95% and the product yield is all above 90%.