{"title":"The separation of mixed plastics using a dry, triboelectric technique","authors":"M.J. Pearse, T.J. Hickey","doi":"10.1016/0304-3967(78)90004-5","DOIUrl":null,"url":null,"abstract":"<div><p>A technique for the dry separation of mixed plastics has been developed. The process involves triboelectrically charging polymer particles by friction on the wall of an air-cyclone, followed by differential deflection in an electrostatic field. The effect of ambient relative humidity on the charge acquired by five commercial polymers has been investigated leading to the separation of a nylon-66 from artificial mixtures containing a polymethylmethacrylate, two kinds of polyethylene and polyvinylchloride (PVC) at room relative humidities and temperatures. Products with a purity above 96% have been achieved with recoveries ranging from 60 to 70%. Recoveries could be increased to about 90% on repassing the material through the apparatus. Such a dry separation process may find application in plastics recycling and recovery.</p></div>","PeriodicalId":101078,"journal":{"name":"Resource Recovery and Conservation","volume":"3 2","pages":"Pages 179-190"},"PeriodicalIF":0.0000,"publicationDate":"1978-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3967(78)90004-5","citationCount":"36","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Resource Recovery and Conservation","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304396778900045","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 36
Abstract
A technique for the dry separation of mixed plastics has been developed. The process involves triboelectrically charging polymer particles by friction on the wall of an air-cyclone, followed by differential deflection in an electrostatic field. The effect of ambient relative humidity on the charge acquired by five commercial polymers has been investigated leading to the separation of a nylon-66 from artificial mixtures containing a polymethylmethacrylate, two kinds of polyethylene and polyvinylchloride (PVC) at room relative humidities and temperatures. Products with a purity above 96% have been achieved with recoveries ranging from 60 to 70%. Recoveries could be increased to about 90% on repassing the material through the apparatus. Such a dry separation process may find application in plastics recycling and recovery.
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