物理化学学报 >> 2001, Vol. 17 >> Issue (02): 189-192.doi: 10.3866/PKU.WHXB20010221

研究简报 上一篇    

有机硫代磷酸与三辛胺作用及萃取锌的反应

张大力;柯家骏;卢立柱   

  1. 北京联合大学化学工程学院，北京　100023；中国科学院化工冶金研究所，北京　100080
  • 收稿日期:2000-07-31 修回日期:2000-10-12 发布日期:2001-02-15
  • 通讯作者:

Mutual Action of Di(2ethlhexyl)dithiophosphoric Acid and Trioctylamine and the Mechanism of Zinc Ion Extraction by them

Zhang Da-Li;Ke Jia-Jun;Lu Li-Zhu   

  1. Institute of Chemical Metallurgy,Chinese Academy of Science,Beijing　100080
  • Received:2000-07-31 Revised:2000-10-12 Published:2001-02-15
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关键词: 锌, 溶剂萃取, 反协同, 有机硫代磷酸, 三辛胺, 界面性质

Abstract: The extraction of zinc by di(2ethylhexyl)dithiophosphoric acid(D2EHDTPA)trioctylamine(TOA) was investigated.Conductance titration and interfacial pressure measurement showed that when D2EHDTPA and TOA were mixed they reacted and formed an electrolyte of ionic pairs.The extraction of zinc by the electrolyte was of antisynergistic nature,and the reaction was Zn2＋＋2BHA(O) → ZnA2(O)＋2B(O)＋2H＋ (subscript (o) stand for “oil phase”).The zinc extraction was an endothermic reaction ,the heat of reaction was 130.1 kJ•mol－1.Some phenomena of interface concerned were also discussed.

Key words: Zinc, Solvent extraction, Antisynergism, Thio-substituted organophosphoric acid, Trioctylamine, Interface properties