Journal
WASTE MANAGEMENT
Volume 33, Issue 2, Pages 484-488Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2012.10.003
Keywords
Waste printed circuit board; Separation; Dimethyl sulfoxide; Dissolution; Bromine epoxy resin
Categories
Funding
- key subject of Shanghai Municipality [S30109]
- Shanghai Science and Technology Commission [10dz1205302]
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Separation of waste printed circuit boards (WPCBs) has been a bottleneck in WPCBs resource processing. In this study, the separation of WPCBs was performed using dimethyl sulfoxide (DMSO) as a solvent. Various parameters, which included solid to liquid ratio, temperature, WPCB sizes, and time, were studied to understand the separation of WPCBs by dissolving bromine epoxy resin using DMSO. Experimental results showed that the concentration of dissolving the bromine epoxy resin increased with increasing various parameters. The optimum condition of complete separation of WPCBs was solid to liquid ratio of 1:7 and WPCB sizes of 16 mm(2) at 145 degrees C for 60 min. The used DMSO was vapored under the decompression, which obtained the regenerated DMSO and dissolved bromine epoxy resin. This clean and non-polluting technology offers a new way to separate valuable materials from WPCBs and prevent the environmental pollution of waste printed circuit boards effectively. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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