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›› 2002, Vol. 2 ›› Issue (2): 0-0.

• 2 •    

仲辛基苯氧乙酸萃取Zn(II)的性能

王艳芝，韩树民，李秋荣，李德谦   

  1. 1. 燕山大学环境与化学工程系, 河北 秦皇岛 066004;2. 中国科学院长春应用化学研究所稀土化学与物理开放实验室，吉林 长春130022
  • 出版日期:2002-04-20 发布日期:2002-04-20

Performance of Extraction of Zn(II) with Sec-octylphenoxy Acetic Acid

WANG Yan-zhi1, HAN Shu-min1, LI Qiu-rong1， LI De-qian2   

  1. 1. Dept. Environ. & Chem. Eng., Yanshan University, Qinhuangdao, Hebei 066004, China; 2. Lab. Rare Earth Chem. & Phy., Changchun Inst. Applied Chem., CAS, Changchun, Jilin 130022, China
  • Online:2002-04-20 Published:2002-04-20

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摘要： 研究了一种新型萃取剂仲辛基苯氧乙酸(CA–12)的皂化以及从盐酸介质中萃取Zn(II)的性能. 考察了萃取温度、平衡水相酸度、萃取剂浓度等因素对萃取的影响. 氨水皂化CA–12的最佳条件是使用含有1.0 mol/L NaCl的稀氨水制皂、皂化率为80%；分配比随平衡水相酸度的增加而减小，且lgD与pH呈线性关系，其斜率约为2；分配比随萃取剂初始浓度的增大而增大；初始酸度pH=6.0~6.5、萃取剂初始浓度CHA>0.10 mol/L时，水相中0.01 mol/L Zn(II)几乎被定量萃取. 计算得到了CA–12从盐酸介质中萃取Zn(II)的过程热效应DH=3.28 kJ/mol.

关键词: 仲辛基苯氧乙酸, 皂化, 盐酸, Zn(II), 萃取

Abstract: The extraction performance of Zn(II) from HCl medium with a new kind of carboxylic extractant, ammonized sec-octylphenoxy acetic (CA–12) and ammonization of the extractant have been studied. The influence of extraction temperature, initial concentration of extractant, etc. on the extraction is examined. The results show that the best conditions for ammonization of CA–12 with NH3.H2O are NaCl concentration of 1.0 mol/L in diluted NH3.H2O and ammonization ratio up to 80%. Distribution ratio D rises along with the decrease of equilibrium acidity and the increase of initial concentration of the extractant. The slope of lgD–pH curve is about 2. 0.01 mol/L Zn(II) is almost extracted completely from HCl medium under the condition of initial pH=6.0~6.5 and initial extractant concentration CHA>0.10 mol/L. The value of DH of the process was calculated to be 3.28 kJ/mol.

Key words: sec-octylphenoxy acetic acid, ammonization, HCl medium, Zn(II), extraction

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