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    • 4. 发明专利
    • Method for recovering rare-earth element
    • 恢复稀土元素的方法
    • JP2003073754A
    • 2003-03-12
    • JP2001310670
    • 2001-08-30
    • Masahiro HirasawaTetsuya Uda哲也 宇田政広 平沢
    • UDA TETSUYAHIRASAWA MASAHIRO
    • C22B59/00C22B5/16C22B7/00C22B9/10
    • Y02P10/122Y02P10/214Y02P10/234
    • PROBLEM TO BE SOLVED: To provide a method for efficiently and inexpensively recovering rare-earth elements with high purity from materials, particularly waste, containing the rare-earth elements and iron family elements. SOLUTION: The method for recovering the rare-earth elements from materials containing the rare-earth elements and the iron family elements, is characterized by steps of contacting the material containing the rare-earth element and the iron family element, such as scrap or sludge of the rare-earth magnet, with iron chloride in a vapor or molten state, making a chlorination reaction of the rare-earth element in the above material proceed, while keeping the metallic state for the iron family element in the above material, and selectively recovering the rare-earth element as chloride from the above material.
    • 要解决的问题:提供一种从含有稀土元素和铁族元素的材料,特别是废物中高效廉价地回收高纯度的稀土元素的方法。 解决方案:从含有稀土元素和铁族元素的材料中回收稀土元素的方法的特征在于使包含稀土元素的材料和铁族元素如废料或污泥 的稀土类磁铁,与蒸气或熔融状态的氯化铁反应,使上述材料中的稀土元素进行氯化反应,同时保持上述材料中的铁族元素的金属状态,并选择性地 从上述材料中回收作为氯化物的稀土元素。