柴油十六烷值改进剂草酸二异戊酯的合成  

Study on Synthesis of a Diesel Fuel Cetane Number Improver—Diisopentyl Oxalate

作　　者：李永强[1] 王书燕[1] 

机构地区：[1]长城汽车股份有限公司技术中心河北省汽车工程技术研究中心,保定071000

出　　处：《化工中间体》2014年第9期42-45,共4页

摘　　要：本采用以草酸和异戊醇为原料,硫酸锌为催化剂,环己烷为带水剂,合成了新型柴油十六烷值改进剂草酸二异戊酯。通过单因素试验,研究了酸醇摩尔比、反应时间、催化剂用量和带水剂用量对酯化反应的影响,采用正交实验考察了各因素对酯收率的影响。结果表明:当反应温度为回流温度(85~120℃),n(草酸):n(异戊醇)=1:2.8,催化剂用量为草酸质量的8%,带水剂用量为10mL/0.1mol草酸,反应时间90min时,草酸二异戊酯的收率为90.3%。The new type of cetane improver diisopentyl oxalate was synthesized by esterification of oxalic acid and isopentyl alcohol with zinc sulfate as catalyst and cyclohexane as water carrying agent.Influences of the mole ratio of reactants,reaction time,dosage of catalyst and cyclohexane on yield were studied by orthogonal test.The optimum conditions showed that reaction temperature was between85 and 120 XI,molar ratio of oxalic acid and isopentyl alcohol was 1:2.8,catalyst amount was 8%weight of oxalic acid,water carrying agent amount was lOmL cyclohexane per O.lmol oxalic acid,the reaction time was 90 min,the yield can be 90.3%.

关 键 词：十六烷值改进剂 草酸二异戊酯 催化酯化 正交实验 

分 类 号：TE624.8[石油与天然气工程—油气加工工程]