Novel waste printed circuit board recycling process with molten salt

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dc.contributor.authorRiedewald, Frank
dc.contributor.authorSousa-Gallagher, Maria J.
dc.contributor.funderEnterprise Irelanden
dc.date.accessioned2018-01-23T11:28:24Z
dc.date.available2018-01-23T11:28:24Z
dc.date.issued2015-02-21
dc.date.updated2018-01-18T11:48:51Z
dc.description.abstractThe objective of the method was to prove the concept of a novel waste PCBs recycling process which uses inert, stable molten salts as the direct heat transfer fluid and, simultaneously, uses this molten salt to separate the metal products in either liquid (solder, zinc, tin, lead, etc.) or solid (copper, gold, steel, palladium, etc.) form at the operating temperatures of 450–470 °C. The PCB recovery reactor is essentially a U-shaped reactor with the molten salt providing a continuous fluid, allowing molten salt access from different depths for metal recovery. A laboratory scale batch reactor was constructed using 316L as suitable construction material. For safety reasons, the inert, stable LiCl–KCl molten salts were used as direct heat transfer fluid. Recovered materials were washed with hot water to remove residual salt before metal recovery assessment. The impact of this work was to show metal separation using molten salts in one single unit, by using this novel reactor methodology. The reactor is a U-shaped reactor filled with a continuous liquid with a sloped bottom representing a novel reactor concept. This method uses large PCB pieces instead of shredded PCBs as the reactor volume is 2.2 L. The treated PCBs can be removed via leg B while the process is on-going.en
dc.description.sponsorshipEnterprise Ireland (Innovation Voucher IV-2013-3384)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRiedewald, F. and Sousa-Gallagher, M. J. (2015) 'Novel waste printed circuit board recycling process with molten salt', MethodsX, 2, pp. 100-106. doi:10.1016/j.mex.2015.02.010en
dc.identifier.doi10.1016/j.mex.2015.02.010
dc.identifier.endpage106en
dc.identifier.issn2215-0161
dc.identifier.journaltitleMethodsXen
dc.identifier.startpage100en
dc.identifier.urihttps://hdl.handle.net/10468/5315
dc.identifier.volume2en
dc.language.isoenen
dc.publisherElsevier B.V.en
dc.rights© 2015, the Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectPrinted circuit boards recyclingen
dc.subjectFloat-sink separationen
dc.subjectMetal recoveryen
dc.subjectMolten salt reactoren
dc.titleNovel waste printed circuit board recycling process with molten salten
dc.typeArticle (peer-reviewed)en
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