Extraction of copper from solution after bioleaching of printed circuit boards (PCBs)

The solvent extraction of copper and iron from bioleaching solutions of PCBs with LIX 860N-IC and next stripping test with H2SO4 were investigated. In test the effect of varying sulfuric acid concentration on stripping rate of Cu and Fe and also phase ratio (O : A) were determined. It was found that the stripping rate of copper increases with the sulfuric acid concentration. The optimal concentration of H2SO4 is suggested to be about 150 g/L and phase ratio O:A = 1:1

Izdvajanje metala iz grupe platina iz korištenih automobilskih katalitičkih convertera

Recycling of platinum group metals from the used auto catalytic converters is profitable from ecological and also economical point of view. This work presents the analysis of the chances of removing the platinum group metals (PGM) from the used auto catalytic converters applying pyrometallurgical and hydrometallurgical methods. The characteristics of auto catalytic converter is shown as well the available technologies used for processing the auto catalytic converters are also presented.Recikliranje metala iz grupe platina od korištenih automobilskih katalitičkih konvertera je profitabilno s ekološkog i također s ekonomskog stajališta. Ovaj rad prezentira analizu mogućnosti izdvajanja metala iz grupe platina od korištenih automobilskih katalitičkih konvertera uz primjenu pirometalurških i hidrometalurških metoda. Prikazane su karakteristike automobilskih katalitičkih konvertera kao i raspoložive tehnologije koje su korištene za obradu automobilskih katalitičkih konvertera

Platinum recovery from used auto catalytic converters in electrorefining process

This paper presents possibility of removing platinum from the used catalytic converters applying copper as a metal collector in pyrometallurgical methods. The catalytic converter carrier was grinded and melted with copper. During the research obtained Cu-Pt alloy was casted as an anode. Such anode was electrically refined in order to recover platinum. Obtained results were discussed

Katalitički konverteri kao izvor platine

The increase of Platinum Group Metals demand in automotive industry is connected with growing amount of cars equipped with the catalytic converters. The paper presents the review of available technologies during recycling process. The possibility of removing platinum from the used catalytic converters applying pyrometallurgical and hyrdometallurgical methods were also investigated. Metals such as Cu, Pb, Ca, Mg, Cd were used in the pyrometallurgical research (catalytic converter was melted with Cu, Pb and Ca or Mg and Cd vapours were blown through the whole carrier). In hydrometallurgical research catalytic converters was dissolved in aqua regia. Analysis of Pt contents in the carrier before and after the process was performed by means of atomic absorption spectroscopy. Obtained result were discussed.Porast zahtjeva za materijalima iz grupe platina u automobilskoj industriji je povezan s povećanim brojem automobila opremeljenim katalitičkim konverterima. Rad prezentira pregled dostupnih tehnologija tijekom procesa recikliranja. Također je istražena mogućnost izdvajanja platine iz korištenih katalitičkih konvertera primjenom pirometalurških i hidrometalurških metoda. Metali kao Cu, Pb, Ca, Mg, Cd su korišteni pri pirometalurgijskom istraživanju (katalitički konverter je rastaljen s Cu, Pb i Ca ili s Mg i Cd parama koje se ispuhavaju kroz cijeli nosač). Kod hidrometalurgijskog istraživanja katalitički konverter je otopljen u carskoj vodici. Analiza sadržaja Pt u nosaču prije i nakon procesa je izvedena pomoću spektroskopije atomskom apsorpcijom. Dobiveni rezultati su obrazloženi

Extraction of copper from solution after bioleaching of printed circuit boards (PCBs)

The solvent extraction of copper and iron from bioleaching solutions of PCBs with LIX 860N-IC and next stripping test with H2SO4 were investigated. In test the effect of varying sulfuric acid concentration on stripping rate of Cu and Fe and also phase ratio (O : A) were determined. It was found that the stripping rate of copper increases with the sulfuric acid concentration. The optimal concentration of H2SO4 is suggested to be about 150 g/L and phase ratio O:A = 1:1

Biohydrometallurgical methods for metals recovery from waste materials

The article draws attention to recently conducted research of bacterial leaching of metals from various polymetallic waste. These wastes are the carriers of valuable metals: base metals, precious and platinum group metals (e.g. electronic waste, spent catalysts) or rare earth elements

Platinum recovery from used auto catalytic converters in electrorefining process

This paper presents possibility of removing platinum from the used catalytic converters applying copper as a metal collector in pyrometallurgical methods. The catalytic converter carrier was grinded and melted with copper. During the research obtained Cu-Pt alloy was casted as an anode. Such anode was electrically refined in order to recover platinum. Obtained results were discussed

Possibilities of platinum recovery from metal supported spent auto catalysts

The used auto catalytic converter is a valuable source of platinum group metals, so it is important to have it recycled in order to recover precious metals. World literature describes a number of pyro- or hydrometallurgical methods used for recovery of platinum from used automobile catalytic converters. However, all the methods, available in the literature, are used to recover platinum from ceramic carrier. Among automotive catalysts withdrawn from use, these with metallic carrier constitute quite a big group