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针对双氧水氧化环己烯合成环氧环己烷的反应体系,采用大孔树脂动态吸附分离反应液水相中的1,2-环己二醇。结果表明,在自行设计吸附柱的基础上,AB-8大孔树脂吸附分离反应液水相中1,2-环己二醇的较佳条件为:上样流速1.0 mL/min,床层高度4.0 cm,常温;通过固定床吸附数学模型得到的速率常数、相关系数、吸附量和动力学参数,能较好地描述AB-8大孔树脂固定床吸附1,2-环己二醇的吸附动力学。以乙酸乙酯为脱附剂进行脱附的较佳条件为:洗脱流速1.0 mL/min,常温;AB-8大孔树脂经5次循环使用后其吸附率和脱附率仍在80%以上。
Aiming at the cyclohexane oxidation reaction of cyclohexene by hydrogen peroxide, the macroporous resin was used to separate the 1,2-cyclohexanediol in the aqueous solution by dynamic adsorption. The results showed that AB-8 macroporous resin adsorbed and separated the 1,2-cyclohexanediol in the aqueous phase of the reaction liquid on the basis of self-designed adsorption column. The optimum conditions were as follows: the flow rate of sample was 1.0 mL / min, the height of the bed 4.0 cm, room temperature. The adsorption rate of 1,2-cyclohexanediol on a fixed bed of AB-8 macroporous resin can be well described by the rate constant, correlation coefficient, adsorption capacity and kinetic parameters obtained from the fixed bed adsorption mathematical model dynamics. The best conditions for the desorption with ethyl acetate as desorbent are as follows: the elution flow rate is 1.0 mL / min, room temperature; the adsorption and desorption rate of AB-8 macroporous resin after 5 cycles are still above 80% the above.