Rare earth element compositions obtained from particulate material comprising kaolin and methods for obtaining such compositions
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United States of America Patent
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May 29, 2018
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N/A
app pub date -
Mar 15, 2013
filing date -
May 10, 2012
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Abstract
A method for obtaining rare earth element compositions may include providing a dispersed aqueous suspension of a particulate material including at least one rare earth element compound and kaolinite. The method may further include adding to the suspension a selective flocculation polymer that facilitates separation of at least a portion of the at least one rare earth element compound from the kaolinite by flocculating the kaolinite and allowing particles of the rare earth element compound to be or remain deflocculated. The method may also include allowing the suspension containing the polymer to separate in a selective flocculation separator into layers including a flocculated product layer and a deflocculated layer containing the portion of the at least one rare earth element compound. The method may further include extracting each of the separated layers from the separator. The rare earth element compound may include La2O3, CeO2, Nd2O3, or Y2O3.
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