Lanthanum methanesulfonate is synthesized and is used as the catalyst in the esterification of citric acid with 2-ethylhexanol.The effects of reaction temperature,amount of catalyst and alcohol ∕ acid molar ratio hav...Lanthanum methanesulfonate is synthesized and is used as the catalyst in the esterification of citric acid with 2-ethylhexanol.The effects of reaction temperature,amount of catalyst and alcohol ∕ acid molar ratio have been investigated.The products are analyzed by means of FT-IR.The yield can be over 97.5% under the optimum conditions that molar ratio of 2-ethylhexanol to citric acid is 3.60∶1,amount of catalyst is 0.25 %(molar percentage of citric acid),reaction temperature is 120℃～130℃ and operation in vacuum.The catalyst can be reused by simple phase-separation after reaction.It is used repeatedly for 5 times without obvious loss of activity and with the yield still over 90.0%.展开更多
以柠檬酸和2-乙基己醇为原料,用结晶硫酸高铈为催化剂合成环保增塑剂柠檬酸三（2-乙基）己酯,考察了反应温度、催化剂用量、醇酸摩尔比、反应时间等因素对反应结果的影响,对合成的产品进行了红外光谱分析。实验结果表明,硫酸高铈催化合...以柠檬酸和2-乙基己醇为原料,用结晶硫酸高铈为催化剂合成环保增塑剂柠檬酸三（2-乙基）己酯,考察了反应温度、催化剂用量、醇酸摩尔比、反应时间等因素对反应结果的影响,对合成的产品进行了红外光谱分析。实验结果表明,硫酸高铈催化合成柠檬酸三（2-乙基）己酯的最佳反应条件为n（2-乙基已醇）∶n（柠檬酸）=3.60∶1,催化剂用量为柠檬酸质量的1.5%,反应时间为90 m in,反应温度为150℃～160℃,在最佳反应条件下,柠檬酸三（2-乙基）己酯收率在98%以上。展开更多
文摘Lanthanum methanesulfonate is synthesized and is used as the catalyst in the esterification of citric acid with 2-ethylhexanol.The effects of reaction temperature,amount of catalyst and alcohol ∕ acid molar ratio have been investigated.The products are analyzed by means of FT-IR.The yield can be over 97.5% under the optimum conditions that molar ratio of 2-ethylhexanol to citric acid is 3.60∶1,amount of catalyst is 0.25 %(molar percentage of citric acid),reaction temperature is 120℃～130℃ and operation in vacuum.The catalyst can be reused by simple phase-separation after reaction.It is used repeatedly for 5 times without obvious loss of activity and with the yield still over 90.0%.
文摘以柠檬酸和2-乙基己醇为原料,用结晶硫酸高铈为催化剂合成环保增塑剂柠檬酸三（2-乙基）己酯,考察了反应温度、催化剂用量、醇酸摩尔比、反应时间等因素对反应结果的影响,对合成的产品进行了红外光谱分析。实验结果表明,硫酸高铈催化合成柠檬酸三（2-乙基）己酯的最佳反应条件为n（2-乙基已醇）∶n（柠檬酸）=3.60∶1,催化剂用量为柠檬酸质量的1.5%,反应时间为90 m in,反应温度为150℃～160℃,在最佳反应条件下,柠檬酸三（2-乙基）己酯收率在98%以上。
