摘要
本文以正辛烷为稀释剂,研究了2-乙基己基膦酸单2-乙基己基酯从硝酸溶液中萃取铜(Ⅱ)的动力学过程。考察了水相酸度、铜(Ⅱ)浓度、萃取剂浓度以及温度和介质等因素对萃取速率的影响。
Rising drop technique has been used to study the Kinetic of the extraction of Cu(Ⅱ) nitrate with P_(507)-Octane. The effect of the Con-centration of Cu( Ⅱ),H ̄+,tempeature and P_(507) on the extraction rate for Cu( Ⅱ)have been examined.It suggest that the rate-controlling step may be the chemical reaction of Cu(Ⅱ)with P_(507) at the liquid-liquid interface.The extraction rate equation can be written as:The apparent rate constant k was evaluated to be 10 ̄(-6.086) dm ̄(-2)s ̄(-1)mol ̄(-1) at25℃and the apparent activation energy is 8.04 kg·mol ̄(-1) betWeen 20~50℃,
出处
《宁夏大学学报(自然科学版)》
CAS
1994年第2期40-44,共5页
Journal of Ningxia University(Natural Science Edition)
关键词
萃取
铜
乙基己基酯
P507
extraction kinetic,copper(Ⅱ),2-ethylhexylphosphonicacid mo-no-2-ethylh exyl exter.