离子交换法分离乳酸  

Lactic Acid Separation by Ion-exchange Method

作　　者：许丽华[1] 栾善东 郑重鸣[1] 丁新华[1] 岑沛霖[1] 

机构地区：[1]浙江大学化工系

出　　处：《离子交换与吸附》1994年第4期328-333,共6页Ion Exchange and Adsorption

基　　金：国家自然科学基金

摘　　要：本文在对多种吸附剂和离子交换树脂进行筛选的基础上，获得了一种对乳酸具有优良吸附性能的弱碱型离子交换树脂，测定了乳酸在该树脂上的离子交换平衡数据，建立了数学模型，研究了其它无机盐的存在对离子交换平衡的影响，同时测量了乳酸在该树脂上的交换速率和穿透曲线．上述研究对于乳酸分离，特别是从稀溶液中分离乳酸提供了一种新的方法，对其它有机酸的分离也具有参考意义．From various ion-exchange resins and adsorbents,a kind of macroporous weakly basic anion-exchange resin D354 was selected to separate lactic acid. The ion-exchange isotherms of lactic acid on D354 resin at different temperature were measured. A mathematic model was suggested to simulate the experimental data.The experimental data showed that the simultaneous ion-exchange and physical adsorption existed in the lactic acid-D354 system.Also,the ion-exchange rate curves and the breakthrough curves of lactic acid solution in ion-exchange column were measured. The effects of inorganic salts on the ion exchange eguilibrium were studied, which showed that the inorganic salt in fermentation broth had little effect on ion-exchange.The experimental results were predicted by the simultaneous ion-exchange and adsorption model to give satisfactory simulation results.

关 键 词：乳酸 弱碱 离子交换树脂 分离 

分 类 号：O623.6[理学—有机化学]