高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (11): 1583.

• 论文 • 上一篇    下一篇

HDEHP和HEHEHP界面性质及添加剂对界面性质的影响

孙思修, 郝京诚, 崔燕, 杨齐眉, 高自立, 沈静兰   

  1. 山东大学化学系, 济南, 250100
  • 收稿日期:1993-11-15 修回日期:1994-05-03 出版日期:1994-11-24 发布日期:1994-11-24
  • 通讯作者: 孙思修,男,50岁,副教授.
  • 作者简介:孙思修,男,50岁,副教授.
  • 基金资助:

    国家自然科学基金

Interfacial Properties of HDEHP and HEHEHP and the Effect of Additives on Interfacial Properties

SUN Si-Xiu, HAO Jing-Cheng, CUI Yan, YANG Qi-Mei, GAO Zi-Li, SHEN Jing-Lan   

  1. Department of Chemistry, Shandong University, Jinan, 250100
  • Received:1993-11-15 Revised:1994-05-03 Online:1994-11-24 Published:1994-11-24

摘要: 测定了HDEHP、HEHEHP、TOPO、TBP、SDS和CTMAB的煤油溶液与硫酸盐水溶液所构成的液-液体系的界面张力,考察了水相pH对界面张力的影响,求得这些化合物的界面吸附常数,计算出饱和吸附时界面吸附分子的截面积,提出了用Cmin计算活性剂分配比的方法,研究了向HDEHP或HEHEHP体系中添加TOPO(或TBP)、SDS、CTMAB时界面张力的变化及其对萃取速率的影响。界面化学反应控制的萃取金属阳离子过程的速率将因添加剂占据界面和(或)形成界面负电层而降低,因添加剂与萃取剂形成界面活性较强的分子缔合物对金属的萃取而提高。

关键词: 界面性质, 表面活性剂, HDEHP, HEHEHP

Abstract: The interfacial properties of surface active agents, HDEHP, HEHEHP, TOPO, TBP.SDS.CTMAB.were investigated at 298 K.The interfacial adsorption parameters, Cmin, A1 and Langmuir's adsorption constant Kwere calculated respectively.The effect of additives on the interfacial tensions were discussed.The causes of the additives for the increase and/or decrease of extraction rate were also explained.

Key words: interfacial property, Surfactant, Bi(2-ethylhexyl) phosphate, 2-Ethylhexylphosphoric acid mono 2-ethylhexyl ester

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