碱性树脂吸附有机羧酸的溶胀现象  

SWELLING IN SORPTION OF CARBOXYLIC ACIDS WITH BASIC RESINS

作　　者：胡徐腾[1] 张瑾[1] 戴猷元[1] 

机构地区：[1]清华大学化学工程系,北京100084

出　　处：《离子交换与吸附》2000年第3期193-198,共6页Ion Exchange and Adsorption

基　　金：国家自然科学基金!29836130

摘　　要：选用强碱性树脂（201×4），弱碱性树脂（D301G）为吸附剂，以乳酸和乙酸稀溶液为吸附分离对象，实验测定了碱性树脂对有机酸和水的组分吸附量，讨论了树脂的溶胀现象．结果表明，随吸附温度的上升，碱性树脂的溶胀程度增大；随着树脂上酸的吸附量的增大，水的组分吸附量也增大．通过对水的组分吸附量的分析，提出溶胀中存在吸水量和表面增益量两个方面的影响．以水的表面增益量为基础，讨论了强碱性树脂201×4和弱碱性树脂D301G对酸－水体系的选择分离性能．In this paper the individual uptake of carboxylic acids and water has been measured.The swelling in sorption of carboxylic acids with basic resins has been discussed. The results show that individual uptake of water increases with increasing uptake of acids and increasing temperature. It has been indicated that swelling contains two aspects, absorption inside the resins and adsorption on the resin's surface. The absorption inside the resins should be considered as a part of wet basis. The individual uptake of water should be compared with that of sorbate based on adsorption on the resin's surface.

关 键 词：碱性树脂 乳酸 乙酸 溶胀 吸附分离 

分 类 号：TQ028.15[化学工程]