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›› 2009, Vol. 9 ›› Issue (6): 1061-1067.

• 反应与分离 • 上一篇    下一篇

TBP对LIX84由Cu2+-NH3-Cl--H2O系萃取铜及氨的影响

刘春轩 胡慧萍 韩雪涛 梁启文 陈启元   

  1. 中南大学化学化工学院 中南大学化学化工学院 中南大学化学化工学院 中南大学化学化工学院 中南大学化学化工学院冶金及应用物理化学研究所
  • 收稿日期:2009-07-29 修回日期:2009-10-09 出版日期:2009-12-20 发布日期:2009-12-20
  • 通讯作者: 胡慧萍

Extraction of Copper and Ammonia from Cu2+-NH3-Cl--H2O System with Mixture of LIX84 and TBP

LIU Chun-xuan HU Hui-ping HAN Xue-tao LIANG Qi-wen CHEN Qi-yuan   

  1. College of Chemistry and Chemical Engineering, Central South University College of Chemistry and Chemical Engineering, Central South University College of Chemistry and Chemical Engineering, Central South University College of Chemistry and Chemical Engineering, Central South University College of Chemistry and Chemical Engineering, Central South University
  • Received:2009-07-29 Revised:2009-10-09 Online:2009-12-20 Published:2009-12-20
  • Contact: HU Hui-ping

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摘要： 以Cu2+-NH3-Cl--H2O氨性溶液为被萃水相，在LIX84中添加磷酸三丁酯(TBP)，考察了有机相中TBP浓度、被萃水相铜离子浓度、总氨浓度和pH值及相比、LIX84浓度对铜萃取率、共萃氨量的影响. 结果表明，随LIX84中TBP浓度升高，铜萃取率变化不大，负载有机相的共萃氨量明显降低. 有机相中TBP浓度为0.1 mol/L、LIX84浓度为40%、被萃水相铜离子浓度25 g/L、总氨浓度3 mol/L及pH值9.1、相比1:1、萃取时间30 min时，铜萃取率约为81%，与未添加TBP时基本一致，而负载有机相的共萃氨量由未添加TBP时的260 mg/L降至添加TBP后的85 mg/L.

关键词: 氨性溶液, 萃取, 共萃氨量, LIX84, 磷酸三丁酯

Abstract: With Cu2+-NH3-Cl--H2O solution as ammoniacal solution, the copper extraction rate and ammonia extraction were investigated. The effects of concentration of Tributyl phosphate (TBP) in the organic phase, concentration of copper ion, total ammonia concentration and pH in the aqueous phase, phase ratio and concentration of LIX84 on copper extraction rate and ammonia extraction in the loaded organic phase were studied. The experimental results show that with the increase of TBP concentration in LIX84, copper extraction rate had little effect, while the ammonia extraction in the organic phase significantly decreased. When the copper concentration in the aqueous phase and total ammonia concentration were 25 g/L and 3 mol/L, respectively, the pH of aqueous phase was 9.1. The solvent extraction with 40%(j) LIX84 adding 0.1 mol/L TBP in the organic phase and a phase ratio of 1:1 in 30 min of contact resulted in 81% of copper extraction rate and 85 mg/L of ammonia extraction in the loaded oil phase, while the copper extraction rate and ammonia extraction in the loaded organic phase in the absence of TBP were 81% and 260 mg/L, respectively.

Key words: ammoniacal solution, solvent extraction, ammonia extraction, LIX84, TBP