METHOD FOR RECYCLING PHOSPHOR

PROBLEM TO BE SOLVED: To provide a method for recycling a so-called degraded phosphor having reduced luminance that is recovered from used fluorescent lamps and cathode ray tubes, in which chemical treatment is unnecessary; the advantages that a waste phosphor can be economically and efficiently rec...

Full description

Saved in:
Bibliographic Details
Main Authors NISHIDA SATOSHI, KAWAI TAKAO
Format Patent
LanguageEnglish
Published 27.08.2003
Edition7
Subjects
ADHESIVES
CHEMISTRY
CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT
DYES
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide a method for recycling a so-called degraded phosphor having reduced luminance that is recovered from used fluorescent lamps and cathode ray tubes, in which chemical treatment is unnecessary; the advantages that a waste phosphor can be economically and efficiently recycled are made to be best use of; and even when the time for reduction is increased when a phosphate phosphor is used as a blue phosphor, a red phosphor is not degraded. SOLUTION: The degraded phosphor is subjected to reduction treatment in a reducing atmosphere of 1,500°C or below, while steam is added to the reducing atmosphere. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20020035877