METHOD FOR DECOMPOSING PLASTIC

PROBLEM TO BE SOLVED: To provide a method for decomposing plastics capable of independently recovering a cross-linking agent dibasic acid copolymer such as a styrene-fumaric acid copolymer and aluminum hydroxide, respectively, by decomposition of plastics containing a thermosetting resin and aluminu...

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Hauptverfasser:	HIDAKA MASARU, MATSUI AYAKO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for decomposing plastics capable of independently recovering a cross-linking agent dibasic acid copolymer such as a styrene-fumaric acid copolymer and aluminum hydroxide, respectively, by decomposition of plastics containing a thermosetting resin and aluminum hydroxide with a subcritical water. SOLUTION: This method includes: a step of decomposing the plastics containing the thermosetting resin and aluminum hydroxide with the subcritical water under coexistence of an alkali; a step of recovering an aluminum hydroxide-dissolved aqueous solution, which contains a salt of the cross-linking agent dibasic acid copolymer, after solid-liquid-separating a decomposed liquid of plastics; a step of solid-liquid-separating the resultant aluminum hydroxide-dissolved aqueous solution that contains the recovered salt of the cross-linking agent dibasic acid copolymer, by supplying an acid to become acidic, into the cross-linking agent dibasic acid copolymer as a solid and the aluminum hydroxide-dissolved aqueous solution; and a step of isolating the aluminum hydroxide from the aluminum hydroxide-dissolved aqueous solution by adding an alkali to the aqueous solution. COPYRIGHT: (C)2011,JPO&INPIT