Rare earth recovery from fluorescent material and associated method

Publication: US-8137645-B2 on Google Patents
Filed / published / granted: 2010-02-23 / 2012-03-20 / 2012-03-20
Offices: US, WO
Applicants: Gen Electric (US, individual); Porob Digamber Gurudas (IN, individual); Srivastava Alok Mani (US, individual); Nammalwar Prasanth Kumar (IN, individual); Ramachandran Gopi Chandran (IN, individual); Comanzo Holly Ann (US, individual)
Minerals: Rare earths
Stages: Compounds and materials
Waste stream: None named in the English text
CPC: C01F17/276, C01B25/305, C09K11/7738, C09K11/7794, C01F11/38, C09K11/7787, C01F5/38, C09K11/778, C09K11/7777, C09K11/01, H01J9/52, C09K11/7734, C01F17/241, C01F17/235, C01F17/224, Y02W30/82, Y02W30/50
Abstract (first 170 chars): 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).

Why it is labelled this way

Decided by cpc-rules: Matched ree by CPC and text.

Source: Google Patents Public Data (BigQuery), CC BY 4.0.