In the present research we developed a novel polymer recycling method for recovery of chloride free polymers from automobile shredder residue (ASR) by selective surface hydrophilization of poly vinyl chloride (PVC) with ozonation followed by froth flotation. We assessed two different shredding methods and alkaline washing as pretreatments for the selective separation of PVC. We also evaluated solution pH and frother concentration in the froth flotation. Two grinding methods by two-shaft shear grinder and single-shaft rotary grinder for ASR did not affect the performance of the selective separation method for PVC from ASR. The pre-washing by alkaline solution for ASR polymers enhanced hydrophilicity of PVC surface, whereas it did not change the surface hydrophobicity of the other heavy polymers. We found that the suitable condition for the selective PVC flotation was solution pH 7 and 2000 mg/l frother concentration. By the pretreatment of NaOH washing and setting suitable condition for froth floatation, 80-85% of heavy polymers can be recovered with less than 1% of PVC by the froth flotation after ozonation. The combination treatment of froth flotation with ozonation is a simple and effective method for separation of PVC from ASR polymers.
A novel polymer recycling system for the effective recovery of chloride free polymers from automobile shredder residue
2008
11 Seiten, 6 Bilder, 1 Tabelle, 30 Quellen
Aufsatz (Konferenz)
Englisch
Progress in recycling of automobile shredder residue
Tema Archiv | 1996
|Pyrolysis: A "Recycling" Option for Automobile Shredder Residue
British Library Conference Proceedings | 1995
|Pyrolysis: A “Recycling” Option for Automobile Shredder Residue
SAE Technical Papers | 1995
|Technologies for Recycling Shredder Residue
SAE Technical Papers | 2007
|Technologies for recycling shredder residue
Kraftfahrwesen | 2007
|