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Recovery of Metals from Tantalum Capacitors with Ionic Liquids

Spitczok von Brisinski, Lena / Goldmann, Daniel / Endres, Frank

Ionic liquids can be applied to recover tantalum capacitors from scrap printed circuit boards. Dissolution experiments with epoxy covered through‐hole tantalum capacitors in Lewis acidic mixtures of dialkylimidazolium halides and aluminum trichloride show that all parts, except the tantalum anode, are dissolved in the ionic liquid. This comprises MnO₂ from the capacitor's electrolyte as well as tin and silver from the metallic contacts. The latter ones can be directly recovered from the solution by electrodeposition. The tantalum anode is mechanically separated and suitable for further metallurgical processing.

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Recovery of Metals from Tantalum Capacitors with Ionic Liquids

Spitczok von Brisinski, Lena / Goldmann, Daniel / Endres, Frank

Ionic liquids can be applied to recover tantalum capacitors from scrap printed circuit boards. Dissolution experiments with epoxy covered through‐hole tantalum capacitors in Lewis acidic mixtures of dialkylimidazolium halides and aluminum trichloride show that all parts, except the tantalum anode, are dissolved in the ionic liquid. This comprises MnO₂ from the capacitor's electrolyte as well as tin and silver from the metallic contacts. The latter ones can be directly recovered from the solution by electrodeposition. The tantalum anode is mechanically separated and suitable for further metallurgical processing.

Recovery of Metals from Tantalum Capacitors with Ionic Liquids

Spitczok von Brisinski, Lena / Goldmann, Daniel / Endres, Frank

Ionic liquids can be applied to recover tantalum capacitors from scrap printed circuit boards. Dissolution experiments with epoxy covered through‐hole tantalum capacitors in Lewis acidic mixtures of dialkylimidazolium halides and aluminum trichloride show that all parts, except the tantalum anode, are dissolved in the ionic liquid. This comprises MnO₂ from the capacitor's electrolyte as well as tin and silver from the metallic contacts. The latter ones can be directly recovered from the solution by electrodeposition. The tantalum anode is mechanically separated and suitable for further metallurgical processing.

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Title:

Recovery of Metals from Tantalum Capacitors with Ionic Liquids

Contributors:

Spitczok von Brisinski, Lena (author) / Goldmann, Daniel (author) / Endres, Frank (author)

Published in:

Chemie Ingenieur Technik ; 86 ; 196-199

Publication date:

2014-02-01

Size:

4 pages

ISSN:

0009-286X , 1522-2640

DOI:

https://doi.org/10.1002/cite.201300059

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Recycling , Ionic liquids , Tin , Tantalum , Silver

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