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采用十六烷基三甲基溴化铵和β-环糊精对凹凸棒土进行改性,研究了凹凸棒土对戊醇异构体的吸附行为。实验结果表明,相同条件下正戊醇在凹凸棒土上的吸附量大于2-甲基-丁醇。以环己烷为溶剂,十六烷基三甲基溴化铵改性后的凹凸棒土对戊醇异构体的吸附量较大,但吸附分离性能较差;而β-环糊精改性的凹凸棒土对戊醇异构体有较好的吸附分离性能,吸附选择性和分离因子分别为92.24和12.16。Langmuir方程拟合呈现出了良好的线性关系,戊醇异构体在凹凸棒土上的吸附等温线符合二级动力学方程模型。
The modified attapulgite was modified by cetyl trimethyl ammonium bromide and β-cyclodextrin to study the adsorption behavior of attapulgite to isopentanol. The experimental results show that the adsorption amount of n-pentanol on attapulgite under the same conditions is greater than that of 2-methyl-butanol. Cyclohexane as a solvent, cetyl trimethyl ammonium bromide modified attapulgite adsorption of pentanol alcohol isomer larger, but the adsorption and separation performance is poor; and β-cyclodextrin The attapulgite had good adsorption and separation properties for isopentanol isomers, the adsorption selectivity and separation factor were 92.24 and 12.16, respectively. Langmuir equation showed a good linear relationship. The isotherms of pentanol alcohol isomers on attapulgite met the second-order kinetic model.