杂多酸型离子液体的合成及在清洁氧化中的应用  

Synthesis of HeteroplyacidInioc Liquids and Their Application in Clean Oxidation

作　　者：宁建梅 彭坤[1] 杨丽霞[1] 李艺[2] 桂建舟[1,2] 刘道胜[1] 吕振波[1] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001 [2]天津工业大学环境与化学工程学院,天津380387

出　　处：《石油化工高等学校学报》2015年第6期14-19,共6页Journal of Petrochemical Universities

基　　金：国家自然科学基金(21103077);辽宁自然科学基金资助项目(201202123);新世纪优秀人才支持计划(NCET-11-1011);辽宁省优秀人才支持计划(LR201024;LJQ2011035)

摘　　要：合成了杂多酸型离子液体BMAI[HPW_(12)O_(40)],并对其进行了核磁共振波谱(~1H-NMR、^(13)C-NMR)、红外光谱(IR)和热重分析技术(TG)等表征,将其作催化剂用于模拟柴油氧化脱硫。结果表明,在40℃、15 mL油样、1.75mL H_2O_2、0.028g离子液体的条件下,4,6-二甲基二苯并噻吩(4,6-DMDBT)的脱硫率可达到95.5%;催化剂重复使用5次之后,催化活性基本不变;同时对4,6-二甲基二苯并噻吩的反应动力学进行了研究,得知该反应为一级反应,表观活化能E_a为31.55kJ/mol,指前因子K_0为2.36×104 min-1。Heteropoly acid type ionic liquid BMAI[HPW12O40]was synthesized as catalyst for simulate diesel oxidative desulfurization which was characterized by 1H-NMR,13C-NMR,IR and TG.The optimal reaction conditions were as follows：reaction temperature of 40 ℃,15 mL oil sample,1.75 mL hydrogen peroxide and 0.028 g heteropoly acid type ionic liquid.Under this conditions,good desulfurization ratio（95.5%）can be achieved.After the reaction,diesel oil and catalyst can be separated by simple decantation,and the activity of catalysts would not change obviously after recycling for 5times.Furthermore,the oxidation kinetics of 4,6-dimethyl-dibenzothiophen was investigated.The oxidation of 4,6-DMDBT can be treated as a first-order reaction,with the apparent activation energy Ea 31.55 kJ/mol and the pre-exponential factor K0 2.36×10^4 min-1.

关 键 词：磷钨酸离子液体 催化氧化脱硫 模拟油 反应动力学 

分 类 号：TE624[石油与天然气工程—油气加工工程] TQ081.8[化学工程]