有色金属科学与工程2016，Vol.7Issue(2)：14-18,5.DOI:10.13264/j.cnki.ysjskx.2016.02.003
CO32-型TOMAC自碱性溶液中萃取硫代亚砷酸
Solvent extraction of thioarsenite by CO 32-type TOMAC in alkaline solutions
摘要
Abstract
The solvent extraction of thioarsenite by tri-n-octylmethyl-ammoniumchloride (TOMAC) of carbon-ate type was proposed for the separation of arsenic in alkali-leaching solutions of As-containing smelting dusts. The simulative leaching solutions were pretreated by sulfidation prior to solvent extraction. The maxi-mum extraction capacity was determined and the extraction mechanism was also discussed. The influences of organic phase composition, organic-aqueous phase ratio, extraction time and temperature on AsIII extraction were further studied. The experimental results show that 85.3 % of AsIII can be extracted with single stage ex-traction under the following conditions: the organic phase, 30 % CO32-type TOMAC+15 % Octanol+55 % sul-fonated kerosene; the water phase, 0.5 mol/L NaOH + 9.69 ×10-2 mol/L AsIII; the room temperature; the phase ratio of VO/VA=1:1. After four-stage counter current extraction, the AsIII concentration of the rafinate is less than 1.34 ×10-3 mol/L while the extraction is more than 98 %. The separation of arsenic in alkaline solutions can be effectively achieved.关键词
碱性溶液/砷/溶剂萃取/分离Key words
alkaline solution/arsenic/solvent extraction/separation分类
矿业与冶金引用本文复制引用
王放,赵洪兴,肖燕飞,徐志峰..CO32-型TOMAC自碱性溶液中萃取硫代亚砷酸[J].有色金属科学与工程,2016,7(2):14-18,5.基金项目
江西省自然科学基金资助项目（20122BAB20602）；2013年度江西省研究生创新专项资金项目；江西省主要学科学术和技术带头人培养计划（20142BCB22005）；江西省“赣鄱英才555工程”青年拔尖人才培养计划 （）
