阳离子交换树脂催化合成草酸二异戊酯的研究  

SYNTHESIS OF DI-ISOAMYL OXALATE OVER CATION EXCHANGE RESIN

作　　者：丁斌[1] 郝凤岭[1] 关昶[1] 弥勇[1] 

机构地区：[1]吉林化工学院化工系,吉林132022

出　　处：《石油炼制与化工》2006年第9期37-40,共4页Petroleum Processing and Petrochemicals

摘　　要：以阳离子交换树脂NKC-9为催化剂,以草酸和异戊醇为原料,对草酸二异戊酯的合成工艺进行了研究。考察了反应温度、原料配比、催化剂用量和反应时间等因素对酯化反应的影响,通过正交实验得到了最佳酯化反应工艺条件。在n(异戊醇)∶n(草酸)=3.5∶1、w(NKC-9)=2.0%、反应温度不大于120℃进行减压酯化反应,在反应时间为3.5h的条件下,草酸的转化率达到94.9%,催化剂重复使用7次后,草酸的转化率仍然可达到94.0%。Di-isoamyl oxalate was synthesized from oxalic acid and iso-amyl exchange resin （NKC-9）by esterification technique under temperature,molar ratio of iso-amyl alcohol to oxalic acid, c reduced pressure. The alcohol over cation effect of reaction atalyst added amount and reaction time on esterification was investigated. Under the optimum reaction conditions of n（iso-amyl alcohol） ： n （oxalic acid）=3.5：1 ,a NKC-9 content of 2.0%（based on the total mass of oxalic acid and iso-amyl alcohol） ,a reaction temperature of less than 120℃ and a reaction time of 3.5 h,the oxalic acid conversions of fresh catalyst and after recycling for 7 times were 94.9% and 94.0% ,respectively.

关 键 词：离子交换树脂 催化剂 草酸二异戊酯 酯化 

分 类 号：O623.624[理学—有机化学] O643.32[理学—化学]