二-(2-乙基己基)磷酸酯与单烷基磷酸酯协同萃取湿法磷酸中铁离子的研究  

Study on the synergistic extraction of iron ions in WPA by P204 and P538

作　　者：张文凯 龚元琳 高凯歌 ZHANG Wenkai;GONG Yuanlin;GAO Kaige(School of Materials and Chemical Engineering,Yibin University,Yibin 644000,China)

机构地区：[1]宜宾学院材料与化学工程学部,四川宜宾644000

出　　处：《磷肥与复肥》2021年第4期4-6,共3页Phosphate & Compound Fertilizer

基　　金：国家级大学生创新训练计划(201810641019)。

摘　　要：以二-(2-乙基己基)磷酸酯(P204)与单烷基磷酸酯(P538)作为协同萃取剂、磺化煤油为稀释剂,从模拟湿法磷酸溶液中萃取Fe^(3+),研究萃取时间、萃取剂浓度、萃取相比、萃取温度对Fe^(3+)萃取效果的影响。结果表明,当萃取时间为25 min、萃取剂浓度为2 mol/L、萃取相比为2∶1、萃取温度为25℃时,铁的单级萃取率最高可达91%,较同条件下单一萃取剂P204和P538萃取率提高约20%,这一研究结果对于高浓度磷酸中杂质铁离子的净化具有重要价值。Fe^(3+)is extracted from simulated WPA solution with P204 and P538 as synergistic extractant and sulfonated kerosene as diluent.And the effects of extraction time,extractant concentration,the volume ratio of oil phase to aqueous phase and extraction temperature on the extraction efficiency of Fe^(3+)are studied.The results show that when the extraction time is 25 min,the concentration of extractant is 2 mol/L,the volume ratio of oil phase to aqueous phase is 2∶1,and the extraction temperature is 25℃,the single-stage extraction rate of iron reaches 91%,which is 20%higher than single extractant P204 and P538 under the same conditions.The result has a significant value in purifying iron ions in high-concentration phosphoric acid.

关 键 词：湿法磷酸 铁离子 P204 P538 协同萃取 

分 类 号：TQ126.35[化学工程—无机化工]