气浮络合萃取分离富集L-苯丙氨酸的研究  

Separation and Enrichment of L-Phenylalanine by Flotation Complexation Extraction

作　　者：毕鹏禹[1] 董慧茹[1] 于宏斌[1] 常林[2] 

机构地区：[1]北京化工大学理学院,北京100029 [2]中国科学院青海盐湖研究所

出　　处：《分析化学》2008年第5期658-662,共5页Chinese Journal of Analytical Chemistry

摘　　要：结合溶剂浮选和络合萃取,提出了气浮络合萃取(floatation complexation extraction)的概念,应用该方法实现了对L-苯丙氨酸的分离富集。在试液的pH为11、NaCl浓度为0.20 mol/L、有机相为80%P204的正己烷溶液、通气流速为40 mL/min、通气时间为60 min的条件下对水相中L-苯丙氨酸进行气浮络合萃取。在分离富集的基础上,用pH<1的HCl水溶液对L-苯丙氨酸进行反萃取,通过紫外和红外光谱分析,确认了分离产物为L-苯丙氨酸。Combining solvent sublation with complexation extraction, the concept of Flotation Complexation Extraction（FCE ） was proposed. The method was used to separate and concentrate L2phenylalanine from aqueous solution successfully. L-phenylalanine was separated under the optimal conditions： pH = 1, concentration of NaC1 was 0.20 mol/L, organic phase was consist of P204 （di-（2-ethylhexyl）phosphate） and hexane （8：2, V/V） , air flow rate was 40 ml/min and flotation time was 60 min. The L-phenylalanine separated and concentrated was stripped by HC1 solution （ pH 〈 1 ） from organic phase, and the product was characterized by UV and FTIR.

关 键 词：气浮络合萃取 溶剂浮选 络合萃取 L-苯丙氨酸 

分 类 号：TQ226[化学工程—有机化工]