精氨酸的溶剂浮选分离技术及其分离机制  

Solvent Sublation of L-Arginine and Its Separation Mechanism

作　　者：梁擘[1] 吴兆亮[1] 胡滨[1] 郑辉杰[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《分析化学》2009年第7期980-984,共5页Chinese Journal of Analytical Chemistry

基　　金：天津市应用基础及前沿技术研究计划重点项目(NO.08JCZDJC25200)

摘　　要：以表面活性剂十二烷基苯磺酸为捕收剂(DBSA),二(2-乙基己基)磷酸酯(P204)为萃取剂,正庚烷为有机溶剂,采用溶剂浮选法对水溶液中精氨酸进行分离富集,并与气浮络合萃取法、泡沫浮选法和溶剂萃取法进行了比较。结果表明,在常温下,0.09g/L精氨酸水溶液250mL、初始pH7.0,DBSA浓度0.15g/L,正庚烷体积10mL,P204体积4.5mL,气体流量200mL/min,溶剂浮选法分离水溶液中精氨酸的富集比为16.2,回收率为97.2%。溶剂浮选法分离精氨酸的动力学实验结果表明,精氨酸的溶剂浮选过程阶段性明显,大致可分为3个阶段,第一阶段和第二阶段都符合一级动力学方程,第三阶段符合零级动力学方程,探索了溶剂浮选法分离精氨酸的分离机制。The solvent sublation technique was applied for the separation and enrichment of L-Arg using dodecylbenzene sulfonic （DBSA） as the surfactant, di （2-ethylhexyl） phosphoric acid （P204） as the extractant and n-heptane as the organic solution. The solvent sublation was compared with the floatation complexation extraction, foam floatation and solvent extraction. The experimental results showed that enrichment ratio of 16. 2 and removal rate of 97.2% to L-Arg were obtained by the solvent sublation under the conditions of room temperature, 0. 09 g/L L-Arg aqueous solution 250 mL, DBSA concentration 0. 15 g/L, the initial pH 7.0, volume of n-heptane 10 mL, volume of P204 4. 5 mL, gas flow rate of 200 mL/min. The study of the kinetics indicated that the solvent sublation process could be divided into three stages distinctly. The processes of the first stage and the second stage followed the first order kinetics equation ; the process of the third stage followed the zero order kinetics equation. The separation mechanism of solvent sublation was also discussed.

关 键 词：精氨酸 溶剂浮选 动力学 分离机制 

分 类 号：O658.2[理学—分析化学]