Methods for recovering bis(2,4,4-trimethylpentyl) dithiophosphinic acid
    1.
    发明授权
    Methods for recovering bis(2,4,4-trimethylpentyl) dithiophosphinic acid 有权
    回收双(2,4,4-三甲基戊基)二硫代次膦酸的方法

    公开(公告)号:US09156866B1

    公开(公告)日:2015-10-13

    申请号:US14482972

    申请日:2014-09-10

    申请人: VALE S.A.

    IPC分类号: C07F9/30

    CPC分类号: C07F9/301 C07F9/308

    摘要: This invention provides a method to recover valuable DTPA from DTPA solvent extraction organic solution that avoids the need to operate at either high or very low temperatures, with extended reaction times and having to carry out solid/liquid separation on organic solution. Furthermore, the invention provides the flexibility of selecting appropriate base solution to carry out the DTPA recovery process and further provides the ability to directly treat metal-containing DTPA organic solution.

    摘要翻译: 本发明提供了从DTPA溶剂萃取有机溶液中回收有价值的DTPA的方法,其避免了在高或非常低的温度下操作的需要,延长的反应时间并且必须在有机溶液上进行固/液分离。 此外,本发明提供了选择合适的碱溶液以进行DTPA回收方法的灵活性,并且还提供直接处理含金属DTPA有机溶液的能力。