JPS5670083A - Recovering method of rare earth element oxysulfide fluorescent substance - Google Patents

Recovering method of rare earth element oxysulfide fluorescent substance

Info

Publication number
JPS5670083A
JPS5670083A JP14599779A JP14599779A JPS5670083A JP S5670083 A JPS5670083 A JP S5670083A JP 14599779 A JP14599779 A JP 14599779A JP 14599779 A JP14599779 A JP 14599779A JP S5670083 A JPS5670083 A JP S5670083A
Authority
JP
Japan
Prior art keywords
fluorescent substance
rare earth
earth element
sulfide
hydrogen peroxide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14599779A
Other languages
Japanese (ja)
Inventor
Susumu Matsuura
Takeshi Takahara
Tadashi Wakatsuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14599779A priority Critical patent/JPS5670083A/en
Publication of JPS5670083A publication Critical patent/JPS5670083A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Landscapes

  • Luminescent Compositions (AREA)

Abstract

PURPOSE: To recover the titled fluorescent substance without degrading the red emission purity, by treating a mixture of a rare earth element oxysulfide fluorescent substance with a sulfide fluorescent substance, e.g. zinc sulfide, with aqueous hydrogen peroxide of specific concentration in a specific amount.
CONSTITUTION: A mixture of a rare earth element oxysulfide fluorescent substance, e.g. ytrrium oxysulfide activated with europium, with a sulfide fluorescent substance, e.g. zinc sulfide and/or zinc cadmium sulfide, is treated with aqueous hydrogen peroxide containing 4 gram-mols or more hydrogen peroxide and in a concentration of 0.5wt% or less to dissolve the sulfide fluorescent substance in the mixture selectively. The undissolved rare earth element oxysulfide fluorescent substance is separated to recover the titled fluorescent substance.
COPYRIGHT: (C)1981,JPO&Japio
JP14599779A 1979-11-13 1979-11-13 Recovering method of rare earth element oxysulfide fluorescent substance Pending JPS5670083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14599779A JPS5670083A (en) 1979-11-13 1979-11-13 Recovering method of rare earth element oxysulfide fluorescent substance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14599779A JPS5670083A (en) 1979-11-13 1979-11-13 Recovering method of rare earth element oxysulfide fluorescent substance

Publications (1)

Publication Number Publication Date
JPS5670083A true JPS5670083A (en) 1981-06-11

Family

ID=15397760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14599779A Pending JPS5670083A (en) 1979-11-13 1979-11-13 Recovering method of rare earth element oxysulfide fluorescent substance

Country Status (1)

Country Link
JP (1) JPS5670083A (en)

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