Purification of polyethylene terephthalate from polyvinyl chloride by froth flotation for the plastics (soft-drink bottle) recycling industry

被引：38
作者：
Drelich, J
Kim, JH
Payne, T
Miller, JD
Kobler, RW
机构：
[1] Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA
[2] Recovery Proc Int Inc, Salt Lake City, UT 84107 USA
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 1999年 / 15卷 / 01期
关键词：
contact angle; flotation; plasticizer; plastics recycling; polyethylene terephthalate; polyvinyl chloride; wettability;
D O I：
10.1016/S1383-5866(98)00047-1
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Strong alkaline solutions of sodium hydroxide are able to destroy the hydrophobicity of polyethylene terephthalate (PET) allowing for the flotation separation of PVC (polyvinyl chloride) from PET. Conditioning of the PVC/PET mixture in a low-concentration solution of polymer plasticizer at elevated temperature enhances the hydrophobicity of PVC particles and only slightly affects the surface properties of PET particles. On this basis, enhancement of the flotation separation by conditioning with a polymer plasticizer, and by the use of non-ionic surfactants, has been developed and tested at a laboratory scale. Using this procedure a 93-95% recovery of PET can be obtained while rejecting almost all PVC (98-100%). (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：9 / 17
页数：9
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