羟基铝柱撑膨润土吸附[BMIM]C1离子液体

研究了羟基铝柱撑膨润土对[BMIM]C1离子液体水溶液的吸附性能,考察了吸附温度、吸附时间、膨润土用量、离子液体的浓度、pH值等对离子液体吸附率的影响.结果表明:羟基铝柱撑膨润土对[BMIM]C1溶液具有良好的吸附作用;温度对吸附的影响甚微;达到吸附平衡的时间为2 h;吸附率随着吸附剂用量的增加而增大,且离子液体的浓度越大,吸附率越大;在中性溶液中,离子液体吸附率可达到最大值;离子液体在羟基铝柱撑膨润土上的吸附同时符合Lang-muir和Freundlich吸附等温方程.

Adsorption of [BMIM]C1 Ionic Liquid on Hydroxy-Alumina Pillared Bentonite

The adsorption capacity of hydroxy-alumina pillared bentonite for [BMIM]C1 ionic liquid solution was measured. The effects of various parameters, including adsorption tempera-ture, contact time, absorbent dosage, ionic liquid concentration and pH, on the absorption ra-tion were investigated. The results show that the hydroxy-alumina pillared bentonite has good adsorption properties for [BMIM]C1 ionic liquid. The effect of temperature on the adsorption is small. The adsorption equilibrium can achieve within 2 h. The adsorption capacity increases a-long with the increasing of absorbent dosage and ionic liquid concentration. In the neutral solu-tion, pillared bentonite has the maximum adsorption capacity. The adsorption isotherm data for the pillared bentonite can be well represented by both the Langmuir and Freundlich models.