中国有色金属学报(英文版)
中國有色金屬學報(英文版)
중국유색금속학보(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2012年
2期
461-466
,共6页
李兴彬%魏昶%吴钧%李存兄%李旻廷%邓志敢%徐红胜
李興彬%魏昶%吳鈞%李存兄%李旻廷%鄧誌敢%徐紅勝
리흥빈%위창%오균%리존형%리민정%산지감%서홍성
钒%溶剂萃取%D2EHPA%EHEHPA%CYANEX272
釩%溶劑萃取%D2EHPA%EHEHPA%CYANEX272
범%용제췌취%D2EHPA%EHEHPA%CYANEX272
vanadium%solvent extraction%D2EHPA%EHEHPA%CYANEX 272
采用有机磷类萃取剂-D2EHPA,EHEHPA和CYANEX272在煤油体系中从硫酸介质中萃取钒(Ⅳ).考察溶液pH值、萃取剂浓度、钒离子浓度、温度对钒萃取性能的影响,并确定萃合物的组成.结果表明:随着水相pH值、萃取剂浓度和温度的升高,钒(Ⅳ)的分配比增大.D2EHPA可以在更低的pH值下萃取钒(Ⅳ),表明其对钒的萃取能力大于EHEHPA和CYANEX272.萃取机理研究结果表明:3种有机磷类萃取剂对钒的萃取均符合离子交换机理,在低pH值条件下萃合物组成为VOR2(HR)2,在高pH值下萃合物组成为VOR2 (R表示萃取剂).
採用有機燐類萃取劑-D2EHPA,EHEHPA和CYANEX272在煤油體繫中從硫痠介質中萃取釩(Ⅳ).攷察溶液pH值、萃取劑濃度、釩離子濃度、溫度對釩萃取性能的影響,併確定萃閤物的組成.結果錶明:隨著水相pH值、萃取劑濃度和溫度的升高,釩(Ⅳ)的分配比增大.D2EHPA可以在更低的pH值下萃取釩(Ⅳ),錶明其對釩的萃取能力大于EHEHPA和CYANEX272.萃取機理研究結果錶明:3種有機燐類萃取劑對釩的萃取均符閤離子交換機理,在低pH值條件下萃閤物組成為VOR2(HR)2,在高pH值下萃閤物組成為VOR2 (R錶示萃取劑).
채용유궤린류췌취제-D2EHPA,EHEHPA화CYANEX272재매유체계중종류산개질중췌취범(Ⅳ).고찰용액pH치、췌취제농도、범리자농도、온도대범췌취성능적영향,병학정췌합물적조성.결과표명:수착수상pH치、췌취제농도화온도적승고,범(Ⅳ)적분배비증대.D2EHPA가이재경저적pH치하췌취범(Ⅳ),표명기대범적췌취능력대우EHEHPA화CYANEX272.췌취궤리연구결과표명:3충유궤린류췌취제대범적췌취균부합리자교환궤리,재저pH치조건하췌합물조성위VOR2(HR)2,재고pH치하췌합물조성위VOR2 (R표시췌취제).
Extraction of vanadium(Ⅳ) from sulphate acid solution was studied using organophosphorous-based extractants D2EHPA,EHEHPA and CYANEX 272 in kerosene.The different parameters affecting the extraction of vanadium(Ⅳ) under equilibrium conditions were separately investigated to elucidate the stoichiometry of the extracted species.The distribution ratio of vanadium increased with increasing equilibrium pH of the aqueous phase,concentration of the extractants and temperature.D2EHPA was found to be a stronger extractant,having greater pH functionality than EHEHPA and CYANEX 272.Extraction of vanadium(Ⅳ) by these organophosphorous-based extractants involved cation exchange mechanism,and the extracted species appear to be VORz(HR)2 in the low equilibrium pH and VOR2 in the higher equilibrium pH,where HR refers to the three acidic extractants.