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US 9,234,128 B2Granted
Chemical bleaching for improved performance of recycled lamp phosphors
AssigneeGeneral Electric Company
InventorsJon Bennett Jansma, David James Monk
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Abstract
A method is provided for removing organic impurities in the recycling of phosphors from fluorescent lamps. Particles created from the lamps are washed with a bleaching agent to decompose the organic materials. The organic materials are thereby solubilized and can be removed. The phosphors can then be recovered and reused to manufacture fluorescent lamps.
Claims15
A method for phosphor recycling, comprising:
- preparing a mixture comprising water, particles created from phosphor coated tubes of fluorescent lamps wherein the particles comprise at least YEO and BAM, and a bleaching agent;
- reacting the bleaching agent with organic materials present in the mixture;
- and
- separating phosphors comprising at least YEO and BAM from the mixture.
1 more element
A method comprising,
- coating lamp tubing with recycled phosphors comprising at least YEO and BAM;
- wherein the recycled phosphors have been recycled by a process comprising:
- preparing a mixture comprising water, a bleaching agent, and particles created from phosphor-coated tubes of fluorescent lamps wherein the particles comprise at least YEO and BAM;
- reacting the bleaching agent with organic materials present in the mixture;
- and
- separating recycled phosphors comprising at least YEO and BAM from the mixture.
3 more elements
Dependencies are inferred from the claim text.