Process for recovering dyestuff from dyestuff-containing information-recording media and solvent used for recovery

The present invention provides a process for efficient recovery of dyestuffs from dye-based optical disks, and to provide a solvent used for recovery. Disclosed herein is a process for recovering dyestuffs from dye-based optical disks by treating the dyestuff-containing layer with a solvent containi...

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Bibliographic Details
Main Authors ICHIMURA; MARI, TOMITA; HIDEMI
Format Patent
LanguageEnglish
Published 01.02.2000
Edition7
Subjects
ADHESIVES
CHEMISTRY
DISPOSAL OF SOLID WASTE
DYES
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PHYSICS
POLISHES
RECLAMATION OF CONTAMINED SOIL SOIL
SEPARATION
TRANSPORTING
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Summary:The present invention provides a process for efficient recovery of dyestuffs from dye-based optical disks, and to provide a solvent used for recovery. Disclosed herein is a process for recovering dyestuffs from dye-based optical disks by treating the dyestuff-containing layer with a solvent containing a singlet oxygen quencher. Disclosed also herein is a solvent for dyestuff recovery which contains a singlet oxygen quencher.
Bibliography:Application Number: US19980159570