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Polyacrylonitrile-encapsulated amorphous zirconium phosphate composite adsorbent for Co, Nd and Dy separations
(Elsevier, 2018)
Recycled Nd and Dy from the end-of-life NdFeB permanent magnet is an important supplement for the increasing demand of rare-earth elements. Thus, there is an urgent need to develop an environmentally friendly recycling ...
Controlled partial neutralization of amphoteric ion exchange resin for improved metals separation
(Elsevier, 2013)
Controlled partial neutralization of an amphoteric aminomethylphosphonium functional ion exchange resin (Lewatit TP-260) was investigated. The particular goal of controlled neutralization was to replace H+ in the acidic ...
Liquid-liquid synthesis of oximes from carbonyl compounds: Formation at neutral conditions and degradation at acidic hydrometallurgical process conditions
(John Wiley & Sons, Inc., 2017)
BACKGROUND
In order to elucidate kinetics in the synthesis of oxime liquid–liquid extraction reagents, used as ligands in hydrometallurgical copper production, the oximation reactions of salicylaldehyde and 2′‐hydroxyacetophenone ...
Ion exchange purification of a silver nitrate electrolyte
(Elsevier, 2018-12-14)
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 ...
Modeling the phase equilibrium in liquid-liquid extraction of copper over a wide range of copper and hydroxyoxime extractant concentrations
(Elsevier, 2017)
The phase equilibrium in the loading and stripping stages of liquid–liquid extraction of copper with hydroxyoxime extractant in kerosene was studied over a wide range of Acorga M5640 extractant (5–25 vol%) and copper (1–45 ...
Novel chromatographic process for the recovery and purification of hydroxy acids from alkaline spent pulping liquors
(Elsevier, 2018-12-14)
In this study, an efficient sequential chromatographic process for recovering hydroxy acids (HAs) from soda and kraft black liquors (BLs) has been developed. Lignin and pulping chemicals are also recovered and can be ...
Numerical simulation of counter-current liquid–liquid extraction for recovering Co, Ni and Li from lithium-ion battery leachates of varying composition
(Elsevier, 2019)
Fractionation of Li-ion battery waste leachates into high-purity Li, Ni, and Co streams in a liquid−liquid extraction circuit was studied using numerical simulations. A new mechanistic mathematical model explaining the ...
Recovery of metal oxoanions from basic solutions using cooperative sorption – Separation of Na2MoO4 and NaOH
(Elsevier, 2018-06-01)
Chromatographic separation of molybdate oxoanions and NaOH was studied using cooperative sorption as a method to recover both Mo and the base as concentrated solutions. Commercial non-ionic microporous adsorbents composed ...
Ion exchange recovery of silver from concentrated base metal-chloride solutions
(Elsevier, 2015)
Ion exchange has not been extensively studied nor industrially used for recovering small amounts of silver from concentrated base metal-chloride solutions. A novel multistep process utilizing a weak anion exchanger with ...
Design of bypass-simulated moving bed chromatography for reduced purity requirements
(Elsevier, 2019-05-08)
Bypass-Simulated moving bed (BP-SMB) chromatography, a process characterized by the possibility of over-purifying the raffinate and/or the extract product followed by blending with the feed, is studied. The BP-SMB provides ...