Recikliranje plemenitih kovin s selektivnim obarjanjem z uporabo izbranih derivatov piritiona

Poljanc, Benjamin (author), Turel, Iztok (mentor)

Razvil sem metodo ločbe zlatovih in bakrovih ionov s selektivnim obarjanjem iz etanola, ki sem jo nato uporabil za recikliranje teh dveh kovin iz odpadnih elektronskih komponent. Sintetiziral sem serijo derivatov piritiona, znotraj katere je bil najprimernejši ligand za selektivno obarjanje bakra 4-(trifluorometil)pirition. Poiskal sem optimalne pogoje za kvantitativno ločbo ionov. Sintetiziral sem en zlatov in en bakrov kompleks, ki sem ju okarakterizirali z jedrsko magnetno resonanco (NMR), masno spektrometrijo, vrstično elektronsko mikroskopijo, praškovno rentgensko difrakcijo, elementno analizo CHNS, UV-Vis in IR spektroskopijo. Razvito metodo ločbe sem uporabil za recikiranje zlata in bakra iz modelnih raztopin in nato še iz pozlačenih konektorskih prstov na tiskanih vezjih.

• Language: Slovenian
• Keywords: recikliranje, zlato, baker, selektivno obarjanje, pirition
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2024
• PID: 20.500.12556/RUL-161594
• COBISS.SI-ID: 215160579
• Publication date in RUL: 12.09.2024

Secondary language

• Language: English
• Title: Recycling of noble metals by selective precipitation with selected pyrithione derivatives

Abstract

A method for the separation of gold and copper ions by selective precipitation from ethanol was developed and applied for the recycling of these two metals from waste electronic components. A series of pyrithione derivatives were synthesized, within which the most suitable ligand – 4-(trifluoromethy)pyrithione – for the selective precipitation of copper was selected. Optimal conditions for the quantitative separation of ions were determined. Representative gold and copper complexes were synthesized and characterized by nuclear magnetic resonance (NMR), mass spectrometry, scanning electron microscopy, powder X-ray diffraction, CHNS elemental analysis, UV-Vis, and IR spectroscopy. The developed separation method was applied for the recycling of gold and copper from model solutions and subsequently from gold-plated connector fingers on printed circuit boards.

• Keywords: recycling, gold, copper, selective precipitation, pyrithione