摘要
采用上升液滴技术，研究了Ｍｇ（Ⅱ）／（Ｎａ，Ｈ）ＮＯ３／ＨＥＨＥＨＰ－Ｏｃｔａｎｅ两相萃取体系的动力学过程，考察了一些关键因素对萃取速率的影响，提出了速率方程。
The kinetics of extraction of Mg(Ⅱ) nitrate with HEHEHPoctane has been studied by means of the single drop technique. The effects of the concentrations of Mg(Ⅱ), H+ and extractant on the extraction rate have been examined. The experimental results indicate that the extraction rate is decided by three interface reactions (7),(8) and (9).The extraction rate equation can be written asR=k(Mg(Ⅱ))(H2A2)2(O)/(H+)The calculated rate constant is 10-6.16(dm-2.s-1.mol-1) at 298 K. The extraction rate increase with the increasing temperature and the apparent activation energy is 4.12 kJ/mol between 289～323 K.
出处
《宁夏大学学报（自然科学版）》
CAS
1997年第4期346-350,共5页
Journal of Ningxia University(Natural Science Edition)
关键词
萃取动力学
镁
HEHEHP
extraction kinetics
magnesium(Ⅱ)
2-ethylhexyl phosphonic acid mono2-ethylhexyl ester
