Method for recycling rare earth element
AssigneesKabushiki Kaisha Toshiba, Niterra Materials Co., Ltd.
InventorsJian Cao, Maho Hayase, Masaaki Hirakawa, Hiroyasu Kondo, Kenji Arai
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Abstract
According to one embodiment, a method for recycling a rare earth element which includes bringing a ceramic sintered body including at least one selected from the group consisting of silicon nitride, silicon carbide, and zirconium oxide, and at least one rare earth element selected from the group consisting of Y, Er, Ce, and La into contact with an aqueous solution including fluoride ions and hydrogen ions in a pressure atmosphere at a temperature of from 100° C. to 400° C. to generate a fluoride of the rare earth element, and separating the fluoride of the rare earth element by solid-liquid separation.
Claims10
A method for recycling a rare earth element, the method comprising:
- bringing a ceramic sintered body comprising at least one selected from the group consisting of silicon nitride, silicon carbide, and zirconium oxide, and at least one rare earth element selected from the group consisting of Y, Er, Ce, and La into contact with an aqueous solution comprising fluoride ions and hydrogen ions in a pressure atmosphere at a temperature of from 100° C. to 400° C. to generate a fluoride of the rare earth element;
- and
- separating the fluoride of the rare earth element by solid-liquid separation.
Dependencies are inferred from the claim text.