二-(2-乙基己基)磷酸-熔融石蜡对锰的固液萃取研究  

Study of solid-liquid extraction of manganese with di(2-ethylhexyl)phosphoric acid into molten paraffin wax

作　　者：彭波[1] 陈平[1] 张彰[1] 巴琳 马世泰 杜新贞[1] 雷自强[1] 

机构地区：[1]甘肃省生物电化学与环境分析重点实验室省部共建生态环境相关高分子材料教育部重点实验室西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2011年第6期36-41,57,共7页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(20774074);生态环境相关高分子材料教育部重点实验室基金资助项目

摘　　要：研究了以熔融石蜡为稀释剂,二-(2-乙基己基)磷酸(D2EHPA,P204)为萃取剂对Mn2+的固液萃取行为.考察了水相酸度、萃取剂浓度、水相中Mn2+浓度、相比、D2EHPA的皂化率、搅拌时间等因素对Mn2+的萃取率的影响.给出了萃取方程式:Mn2++H2A2=MnA2+2H+,测定了萃取热力学数据.应用本萃取体系,可在pH=0.5～1.2时对锰铁溶液进行选择性萃取.The extraction behavior of manganese with di（2-ethylhexyl）phosphoric acid（P204,D2EHPA）into molten paraffin wax has been studied.The effects of pH,D2EHPA concentration,phase ratio,manganese ion concentration,D2EHPA concentration,extraction time,temperature etc.on the extraction percentage are discussed in details.The extraction reaction is given to be Mn2＋＋H2A2=MnA2＋2H＋.The extraction thermodynamics data are determined.The study has indicated that the iron ion can be separated from manganese ion in the pH range of 0.5 to 1.2.

关 键 词：萃取 石蜡 二-(2-乙基己基)磷酸 锰 铁 

分 类 号：O658.2[理学—分析化学]