两性离子交换树脂吸附L-苹果酸热力学研究  

STUDY OF MALIC ACID THERMODYNAMICS WITH AMPHOTERIC ION-EXCHANGE RESIN

作　　者：蔡宇杰 丁彦蕊 须文波 孙培冬 彭奇均 

机构地区：[1]江南大学,无锡214036

出　　处：《离子交换与吸附》2002年第2期168-173,共6页Ion Exchange and Adsorption

摘　　要：本文研究了两性离子交换树脂柱吸附分离L-苹果酸的热力学行为,在分析柱上测定了不同温度时的吸附等温线热力学性能的变化,结果表明,当温度从20℃至80℃变化时,该树脂对L-苹果酸的吸附量显著减小,故可采用热水作为洗脱剂进行脱附。进一步计算得该树脂吸附热ΔH为-34.89 KJ/mol,该值远大于一般的酸/碱离子交换树脂,因而温度对其平衡产生很大的影响。The thermodynamics of malic acid adsorption separation with amphoteric ion exchange resin was studied. The adsorption behavior of resin under different temperature was discussed. It was found that saturation adsorptive capacity decreases largely when the temperature change from 20℃ to 80℃。So heat water can be used as eluent. Heat adsorption of amphoteric ion-exchange resin is -34.89 KJ/mol. it抯 greater than other ion-exchange resins, so temperature can effect its equilibrium significantly.

关 键 词：热力学 两性离子交换树脂 L-苹果酸 吸附等温线 分离 

分 类 号：O623.651[理学—有机化学] O647.31[理学—化学]