SOLUBILIZATION AND FRACTIONATION OF PLASTIC WASTE

PROBLEM TO BE SOLVED: To enable efficient solubilization and fractionation of the subject plastic waste without mechanical and electric troubles in no occurrence of harmful gas in need of a reduced amount of heat at dissolving the plastic waste in the fractionation solvent through a plurality of dis...

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Bibliographic Details
Main Authors HINO KOICHI, UEMURA FUMIHIKO, MORIYA NOBUO, SAKASHITA KOJI, KOSHIRO MASAZUMI
Format Patent
LanguageEnglish
Published 23.02.1999
Edition6
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
DISPOSAL OF SOLID WASTE
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
RECLAMATION OF CONTAMINED SOIL SOIL
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
WORKING-UP
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Summary:PROBLEM TO BE SOLVED: To enable efficient solubilization and fractionation of the subject plastic waste without mechanical and electric troubles in no occurrence of harmful gas in need of a reduced amount of heat at dissolving the plastic waste in the fractionation solvent through a plurality of dissolution steps and transporting the dissolved products to the individual stages by their gravity flows. SOLUTION: (A) A plastic waste, in an embodiment, comprising a hydrocarbon plastic (as a polyolefin plastic, an aromatic plastic) (A1 ) and not-hydrocarbon plastic (A2 ) as polyvinyl chloride or polyethylene terephthalate, for example, the proportion of the A1 is >=50 wt.% is dissolved in (B) a fractionation solvent, a liquid mixture of an aromatic hydrocarbon (B1 ) and a paraffin hydrocarbon (B2 ), for example, containing 5-70 wt.% of B1 and 5-85 wt.% of B2 and the solution is subjected to the fractionation into the soluble components and the non-soluble components. At this time, the component A is dissolved in the component B in a plurality of steps and the dissolved products are transferred to the following step by its own gravidity flow.
Bibliography:Application Number: JP19970219279