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    METHOD FOR EXTRACTING AND SEPARATING RARE-EARTH ELEMENT
    1.
    发明申请
    METHOD FOR EXTRACTING AND SEPARATING RARE-EARTH ELEMENT 有权
    提取和分离稀土元素的方法

    公开(公告)号：US20150059528A1

    公开(公告)日：2015-03-05

    申请号：US14389300

    申请日：2012-09-29

    申请人： CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY, CHINESE ACADEMY OF SCIENCES

    发明人： Ji Chen ,  Lin Guo ,  Lu Shen ,  Yuefeng Deng ,  Jingbo Lan

    IPC分类号： C22B59/00 ,  C22B3/04 ,  C22B3/14

    CPC分类号： C22B59/00 ,  C22B3/0005 ,  C22B3/0079 ,  C22B3/04 ,  C22B3/14 ,  Y02P10/234

    摘要： A method for extracting and separating a rare-earth element. Cations and anions in a quaternary ammonium ionic liquid extractant, that is, 2-ethylhexyl phosphate mono-2-ethylhexyl acrylate trialkyl methyl ammonium and phosphate di(2-ethylhexyl) phthalate trialkyl methyl ammonium, react with rare-earth ions to form neutral complex molecules, also, a collaborative effect and a competitive effect are present between the cations and the anions in the quaternary ammonium ionic liquid extractant in a rare-earth element extraction process, the separation factor for the rare-earth element is thus increased. The method for extracting and separating the rare-earth element provides good interfacial phenomena in the extraction process, does not generate emulsification, obviates the need for extractant saponification, and provides increased separation factor for rare-earth elements, and particularly increased separation factor for heavy rare-earth elements. In addition, the rare-earth element extraction and separation method is of reduced extraction acidity, of reduced stripping acidity, and of reduced acid consumption.

    摘要翻译： 一种提取和分离稀土元素的方法。 季铵离子液体萃取剂中的阳离子和阴离子，即磷酸2-乙基己基酯，丙烯酸2-乙基己基酯三烷基甲基铵和磷酸二（2-乙基己基）邻苯二甲酸三烷基甲基铵与稀土离子反应形成中性络合物 分子在稀土元素萃取工艺中的季铵离子液体萃取剂中的阳离子和阴离子之间也存在协同效应和竞争效应，因此稀土元素的分离因子因此增加。 提取和分离稀土元素的方法在提取过程中提供了良好的界面现象，不会产生乳化，不需要萃取剂皂化，并为稀土元素提供增加的分离因子，特别是提高重分离因子 稀土元素。 此外，稀土元素萃取分离方法具有降低萃取酸度，降低汽提酸度，降低酸消耗。