Optimization of Indium Recovery and Separation from LCD Waste by Solvent Extraction with Bis(2-ethylhexyl) Phosphate (D2EHPA)
Artikel i vetenskaplig tidskrift, 2014

Indium tin oxide (ITO) is currently the choice of electrode material in liquid crystal displays (LCDs). D2EHPA is known to be an extractant that can be used to selectively recover indium from 1 M sulfuric acid. In order to optimize the extraction and separation of indium from LCD waste, the effects of pH, temperature, time, and extractant concentration on the distribution ratios of In(III) and the major impurities such as Al(III), Cu(II), Fe(III), and Zn(II) were investigated. Metal concentrations in the aqueous feed were based on the concentrations found in the leach liquor of LCD panel glass at 0.1 g/mL S/L ratio. This study showed that extraction of indium could be increased at <293 K and stripping of indium could be increased at >293 K. Furthermore, by increasing D2EHPA concentration from 0.1 M to 0.25 M, extraction of indium could be increased from 70% to >95%.

Författare

Jiaxu Yang

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Christian Ekberg

Chalmers, Kemi- och bioteknik, Kärnkemi

Teodora Retegan

Chalmers, Kemi- och bioteknik, Kärnkemi

International Journal of Chemical Engineering

1687-806X (ISSN) 1687-8078 (eISSN)

186768

Ämneskategorier

Kemi

DOI

10.1155/2014/186768

Mer information

Skapat

2017-10-07