Dissolution of manganese(IV) oxide from tantalum capacitor scrap by organic acids

• Autorzy: Andrzej Piotrowicz , Stanisław Pietrzyk
• Języki publikacji: EN

Abstrakty

EN

The dissolution of MnO2from tantalum capacitor scrap using organic acids in various process conditions was studied. The initial materials were of two types: LTC (leaded tantalum capacitors)and SMDTC (surface-mounted device tantalum capacitors). The research materials were prepared by pyrolysis, grinding and sieving and the preparation processes were characterized. Dissolution of MnO2was carried out with the use of sulfuric acid solutions with the addition of acetic, ascorbic, citric and oxalic organic acids. Results show thatthe addition of organic acids significantly improves dissolution yields (72-94 vs 90-99 % for H2SO4and acid mixtures, respectively). In practice, a concentration of organic acid above 1 M results in the complete removal ofMnO2. (original abstract)

Słowa kluczowe

EN

Organic chemistry; Recycling; Electronics industry

PL

Chemia organiczna; Recykling; Przemysł elektroniczny

• Czasopismo: Acta Innovations
• Rocznik: 2019
• Numer: nr 32
• Strony: 63--77

Twórcy

autor

Andrzej Piotrowicz

• AGH University of Science and Technology Kraków, Poland

autor

Stanisław Pietrzyk

• AGH University of Science and Technology Kraków, Poland

Bibliografia

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Identyfikatory

DOI

10.32933/ActaInnovations.32.7