Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation
Surface ozonation of polyvinyl chloride for its separation from waste plastic mixture by froth floatation
复制标题
DOI：
10.1007/s10163-010-0305-x
复制
发表时间：
2010-11-01
影响因子：
3.1
通讯作者：
Okada, Mitsumasa
中科院分区：
文献类型：
--
作者：
Reddy, Mallampati Srinivasa;Okuda, Tetsuji;Okada, Mitsumasa
通过臭氧化对聚氯乙烯 (PVC) 进行选择性表面改性，以促进通过泡沫浮选工艺将 PVC 与密度几乎与 PVC 相同的其他重质塑料，特别是聚对苯二甲酸乙二醇酯 (PET) 分离。研究了最佳泡沫浮选条件，发现在40A℃时，90%的PVC和PET塑料浮出。随着温度的升高，气泡尺寸变大，塑料表面被气泡覆盖的面积减少。即使对于尺寸为 10 毫米的片材样品，在 40A 摄氏度的浮选溶液和 180-200 rpm 的混合速度下也能实现最佳的 PVC 分离。臭氧化和泡沫浮选联合处理是一种简单、有效、廉价的废塑料中 PVC 分离方法。
Selective surface modification of polyvinyl chloride (PVC) by ozonation was evaluated to facilitate the separation of PVC from other heavy plastics with almost the same density as PVC, especially polyethylene terephthalate (PET), by the froth flotation process. The optimum froth flotation conditions were investigated, and it was found that at 40A degrees C, 90% of PVC and PET plastics floated. The bubble size became larger and the area covered with bubbles on the plastic surface was reduced with increasing temperature. Optimum PVC separation was achieved with the flotation solution at 40A degrees C and mixing at 180-200 rpm, even for sheet samples 10 mm in size. Combined treatment by ozonation and froth flotation is a simple, effective, and inexpensive method for PVC separation from waste plastics.