Supercritical extraction of polymers from printed circuit boards using CO2 and ethanol
作者： Camila O Calgaro , Diego F Schlemmer , Mariana M Bassaco , Guilherme L Dotto , Eduardo H Tanabe
DOI: 10.1016/J.JCOU.2017.10.020
关键词:
摘要: Abstract The printed circuit boards are the fundamental components of waste electrical and electronic equipment (WEEE). PCBs stand out due to amount metals in their composition as well for complex heterogeneous constitution that make recycling difficult. In this context, aims study was evaluate application supercritical CO2 modified with ethanol order remove polymers contained from discarded mobile phones. were characterized an evaluation extraction performed through experimental design. characterization showed 64.02 wt% metals, 20.51 wt% ceramics 15.47 wt% polymers. fractional factorial design 69.53 wt% present extracted, at 170 °C 7.5 MPa. As remaining no longer covering they could be more easily leached therefore effectively recovered.
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