Ion exchange purification of a silver nitrate electrolyte
Virolainen, Sami; Maliarik, Mikhail; Holopainen, Olli; Sainio, Tuomo (2018-12-14)
Post-print / Final draft
Virolainen, Sami
Maliarik, Mikhail
Holopainen, Olli
Sainio, Tuomo
14.12.2018
Minerals Engineering
132
175-182
Elsevier
School of Engineering Science
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe201901283308
https://urn.fi/URN:NBN:fi-fe201901283308
Tiivistelmä
A novel ion exchange process was studied to remove high concentration of Cu impurity from AgNO3 electrolyte was studied. A suitable ion exchange resin was screened using laboratory scale experiments with a synthetic nitrate electrolyte solution of the following composition: 80.5–90.3 g/L Ag and 37.9–44.3 g/L Cu. Based on simulations with a developed mechanistic ion exchange model, a process scheme was constructed for the best resin, 2-(aminomethyl)pyridine functional chelating CuWRAM. The process was shown to be capable of producing 0.46 BV/h of a purified electrolyte solution containing >70 g/L Ag and <10 g/L Cu. Based on the simulations, roughly 10% of the Ag would be lost to eluate, but because the model overestimates Ag adsorption, the actual percentage is assumed to be lower as based on breakthrough experiments as the model overestimates the Ag adsorption.
Lähdeviite
Virolainen, S., Maliarik, M., Holopainen, O., Sainio, T., Ion exchange purification of a silver nitrate electrolyte. Minerals Engineering 132, 175–182. DOI: https://doi.org/10.1016/j.mineng.2018.12.020
Alkuperäinen verkko-osoite
https://www.sciencedirect.com/science/article/pii/S0892687518305624?via%3DihubKokoelmat
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