CAJ | 학술논문

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,0.09 g/L精氨酸水溶液250 mL、初始pH 7.0,DBSA浓度0.15 g/L,正庚烷体积10 mL, P204体积4.5 mL,气体流量200 mL/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.
이표면활성제십이완기분광산위포수제(DBSA),이(2-을기기기)린산지(P204)위췌취제,정경완위유궤용제,채용용제부선법대수용액중정안산진행분리부집,병여기부락합췌취법、포말부선법화용제췌취법진행료비교.결과표명,재상온하,0.09 g/L정안산수용액250 mL、초시pH 7.0,DBSA농도0.15 g/L,정경완체적10 mL, P204체적4.5 mL,기체류량200 mL/min,용제부선법분리수용액중정안산적부집비위16.2,회수솔위97.2%.용제부선법분리정안산적동역학실험결과표명,정안산적용제부선과정계단성명현,대치가분위3개계단,제일계단화제이계단도부합일급동역학방정,제삼계단부합령급동역학방정,탐색료용제부선법분리정안산적분리궤제.
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.