Method for processing fluorescent material

Details Method for processing fluorescent material Method for processing fluorescent material

1993-07-26

1995-04-04

Lieberman, Paul

Cleaning and liquid contact with solids

Processes

Miscellaneous

2523016R, 2523014S, C09K 1101, B08B 700

Patent

active

054034035

ABSTRACT:
A method for processing fluorescent material which removes various impurities contained in fluorescent material recovered in developing a fluorescent coating on a fluorescent screen of a color image receiving tube. The recovered fluorescent material can therefore be reused. The method comprises the steps of recovering unexposed fluorescent material which comes off on being developed, dispersing the recovered fluorescent material in water, cleaning the dispersed fluorescent material with an alkali, draining and washing the resultant fluorescent material in water, dehydrating and drying the fluorescent material, and screen-sizing the dried fluorescent material through mesh. Optionally, the cleaned fluorescent material is surface-treated with a colloidal silica (water glass) solution and zinc hydroxide suspension.

REFERENCES:
patent: 3647522 (1972-03-01), Single
patent: 5171474 (1992-12-01), Tono
Masterton, et al. Chemical Principles 4th ed. W. B. Saunders Company, 1977, pp. 433-434.

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