AB-8大孔树脂对1,2-环己二醇动态吸附性能研究

Study on dynamic adsorption properties of 1,2-Cyclohexanediol using macroporous resin by AB-8

摘要:

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。

Abstract:

For the reaction system of cyclohexene oxidation product epoxy cyclohexane by hydrogen peroxide, Using the technology of macroporous resin to adsorption and separation 1,2-Cyclohexanediol in reaction aqueous solutions. In basis of the self-made absorption column, the results showed that the better conditions for adsorption and separation 1,2-cyclohexanediol in reaction aqueous solutions by AB-8 resin were: sample flow rate 1.0 mL/min, bed height 4.0 cm, normal temperature. The rate constants, correlation coefficients, adsorption capacity and kinetic parameters, which were calculated through mathematical models, can be used to describe the adsorption kinetics of 1,2-Cyclohexanediol by AB-8 resin well. The better conditions of desorption using ethyl acetate were: elute rate 1.0 mL/min, normal temperature. The absorption rate and desorption rate of AB-8 resin can still reach persantage of 80 after recyling five loops.