【摘要】 以马来酸酐和异辛醇为原料,研究了酸性离子液体催化剂催化合成马来酸二异辛酯的反应,考察了离子液体种类、酐醇摩尔比、离子液体用量、反应时间等对反应的影响。得到较佳工艺条件:以酸功能化离子液体[HSO3-pPy]HSO4为催化剂,n(马来酸酐)∶n(异辛醇)=1∶2.2,马来酸酐0.1 mol,催化剂用量2.3 g,反应时间2.0 h。在该条件下,马来酸酐酯化率达98.8%。反应结束后离子液体通过简单倾析即可与反应液分离,分离后的离子液体未经任何处理可重复使用6次,酯化率没有明显降低(>98.4%),具有较好的重复使用性能。更多还原

【Abstract】 The synthesis of diisooctyl maleate in acidic ionic liquid was studied,including influences of different ionic liquids,molar ratio of reactants,quantity of ionic liquid and reaction time.Using [HSO3-pPy]HSO4 as catalyst,under the optimal reaction condition of n(maleic anhydride)∶n(isooctyl alcolol) = 1∶2.2,maleic anhydride 0.1 mol,ionic liquid 2.3 g,reaction time 2.0 h,the conversion of maleic anhydride reached 98.8%.Furthermore,[HSO3-pPy]HSO4 is immiscible with the product and can be separated conveniently by decantation after reaction.The recycled [HSO3-pPy]HSO4 could be reused 6 times without any processing and the esterification conversion was over 98.4%,no apparent decrease of function compromise.更多还原