METHOD FOR RECOVERING POLYVINYL BUTYRAL FROM SAFETY GLASS WASTES

The invention relates to a method for recycling safety glass wastes. According to the invention, the method consists in passing the wastes on a roller drum, there being obtained comminuted glass and a sheet of polyvinyl butyral, after which the comminuted material is separated by vibration on a grat...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DAVID ELENA, ŞTEFĂNESCU IOAN, ARMEANU ION-ADRIAN
Format:	Patent
Sprache:	eng ; rum
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT DISPOSAL OF SOLID WASTE GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECLAMATION OF CONTAMINED SOIL SOIL RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention relates to a method for recycling safety glass wastes. According to the invention, the method consists in passing the wastes on a roller drum, there being obtained comminuted glass and a sheet of polyvinyl butyral, after which the comminuted material is separated by vibration on a grating having a mesh size of 5..6 cm, wherefrom the glass is recovered and the sheet is further on divided into fragments and subjected to separation by flotation in aqueous medium wherefrom a fraction containing the impurities is removed and a fraction containing the unpurified polyvinyl butyral is recovered, said fraction being subjected to separation by flotation in a medium of aqueous solution of ferrous sulphate or sodium sulphate wherefrom the plastic is recovered and washed with water, followed by a chemical treatment for purifying the surfaces at a temperature of 50...60°C for 6...12 min, finally there being prepared polyvinyl butyral with a purity of 99% which is reused in the glass lamination process.