酸改性膨润土对[BMIM]Cl离子液体的吸附  

Adsorption of [BMIM]Cl ionic liquid by acid-modified bentonite

作　　者：李雪辉[1] 李帅[1] 王芙蓉[1] 奚红霞[1] 王乐夫[1] 

机构地区：[1]华南理工大学化工与能源学院,广东省绿色化学产品技术重点实验室,广东广州510640

出　　处：《化工学报》2007年第6期1489-1493,共5页CIESC Journal

基　　金：国家自然科学基金项目(20206010);广东省科技攻关项目(2006B13801002);广州市科技攻关项目(2006Z3-E0671)。~~

摘　　要：利用酸改性膨润土对低浓度[BMIM]Cl离子液体水溶液的吸附性能进行研究,考察了吸附温度、吸附时间、溶液pH值等吸附条件对离子液体的吸附率的影响。结果表明,酸改性膨润土对[BMIM]Cl的阳离子具有良好的吸附作用。在中性溶液中,酸改性膨润土对离子液体具有最大的吸附率。酸改性膨润土对离子液体的吸附过程是放热过程且属于Langmuir等温吸附,同时,得到膨润土上离子液体吸附的Langmuir等温方程且相关系数大于0.99。Acid-modified bentonite was used for the adsorption of low concentration [BMIM] Cl ionic liquid solution. The effect of adsorption temperature, adsorption time and pH value of ionic liquid solution on the adsorption properties was investigated. Experimental results showed that acid-modified bentonite had good adsorption properties for the cation of [BMIM] Cl ionic liquid. In the neutral solution, acidmodified bentonite had the maximum adsorption capacity for [BMIM] Cl. The adsorption process of [BMIM] Cl by acid-modified bentonite was exothermic and belonged to the Langmuir isothermal adsorption. At the same time, the Langmuir isothermal adsorption equation was obtained and the correlation coefficient was larger than 0.99.

关 键 词：离子液体 吸附 酸改性膨润土 [BMIM]Cl 

分 类 号：TQ028.1[化学工程]