Method for recycling colored PVB (Polyvinyl Butyral)

The invention discloses a method for recycling colored PVB (Polyvinyl Butyral), comprising the following steps of: placing the colored PVB in a container, adding a solvent and heating to stir and dissolve; adding a decolorizing agent to decolorize and filtering after stirring; completely vaporizing...

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Bibliographische Detailangaben
Hauptverfasser:	HE WEI, GUO XINFU, HU YIHUI, WANG FENGE, SHENG XUEQIANG, XU YIN
Format:	Patent
Sprache:	chi ; 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 COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS 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:	The invention discloses a method for recycling colored PVB (Polyvinyl Butyral), comprising the following steps of: placing the colored PVB in a container, adding a solvent and heating to stir and dissolve; adding a decolorizing agent to decolorize and filtering after stirring; completely vaporizing the PVB filtrate and recovering the solvent; or vaporizing and concentrating the PVB filtrate and adding into an exhaust type extruder for extrusion and granulation, wherein an exhaust port of the extruder is connected with a solvent recovery device to recover the solvent; or adding the PVB filtrate into water to precipitate out the PVB, and taking out the PVB which is attached to the inner wall of the container of a stirrer for drying so as to obtain recyclable colorless or light-colored PVB.