JPS5594985A - Regeneration of colored phosphor - Google Patents

Regeneration of colored phosphor

Info

Publication number
JPS5594985A
JPS5594985A JP135279A JP135279A JPS5594985A JP S5594985 A JPS5594985 A JP S5594985A JP 135279 A JP135279 A JP 135279A JP 135279 A JP135279 A JP 135279A JP S5594985 A JPS5594985 A JP S5594985A
Authority
JP
Japan
Prior art keywords
phosphor
gelatin
inorganic pigment
polyvinylpyrrolidone
washed
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
JP135279A
Other languages
Japanese (ja)
Inventor
Hiroshi Sasaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP135279A priority Critical patent/JPS5594985A/en
Publication of JPS5594985A publication Critical patent/JPS5594985A/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 regenerate red-luminescent Eu-activated yttrium oxysulfide and blue- and green-luminescent zinc sulfide-based phosphor by a method wherein recovered inorganic pigment-coated phosphor undergoes surface treatment with aqueous calcium hydroxide solution and then is deposited with inorganic pigment.
CONSTITUTION: Colored phosphor recovered from waste development solution as solid component is washed with aq. alkali solution at room temperature to 100°C to dissolve slurry components such as polyvinyl alcobol and ammonium dichromate and pigment binders such as gelatin and polyvinylpyrrolidone. The phosphor is then thoroghly washed with water and centrifugal treatment and undergoes surface treatment with 0.01wt% or more aqueous calcium hydroxide solution. Next, centrifugation, etc. is used for dehydration and drying of phosphor, and supplementary inorganic pigment is deposited by means of gelatin-gum arabic process or gelatin- polyvinylpyrrolidone process. This provides reusable colored phosphor.
COPYRIGHT: (C)1980,JPO&Japio
JP135279A 1979-01-12 1979-01-12 Regeneration of colored phosphor Pending JPS5594985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP135279A JPS5594985A (en) 1979-01-12 1979-01-12 Regeneration of colored phosphor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP135279A JPS5594985A (en) 1979-01-12 1979-01-12 Regeneration of colored phosphor

Publications (1)

Publication Number Publication Date
JPS5594985A true JPS5594985A (en) 1980-07-18

Family

ID=11499091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP135279A Pending JPS5594985A (en) 1979-01-12 1979-01-12 Regeneration of colored phosphor

Country Status (1)

Country Link
JP (1) JPS5594985A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4000755A1 (en) * 1990-01-12 1991-07-18 Nokia Unterhaltungselektronik METHOD FOR RECOVERY OF FLUORESCENT FOR PIPES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4000755A1 (en) * 1990-01-12 1991-07-18 Nokia Unterhaltungselektronik METHOD FOR RECOVERY OF FLUORESCENT FOR PIPES

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