Rare earth recovery from fluorescent material and associated method
A method of recovering a rare earth constituent from a phosphor is presented. The method can include a number of steps (a) to (d). In step (a), the phosphor is fired with an alkali material under conditions sufficient to decompose the phosphor into a mixture of oxides. A residue containing rare earth oxides is extracted from the mixture in step (b). In step (c), the residue is treated to obtain a solution, which comprises rare earth constituents in salt form. Rare earth constituents are separated from the solution in step (d).
General Electric Company
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Alok Mani Gopi Chandran Digamber Gurudas Prasanth Kumar Holly Ann
Srivastava Ramachandran Porob Nammalwar Comanzo