scholarly journals Liquid-liquid extraction of Pt(IV) from hydrochloric acid solutions using PPG 425 – NaCl – H2O system

2022 ◽  
Vol 1212 (1) ◽  
pp. 012011
Author(s):  
I V Zinov’eva
Keyword(s):  
Hydrochloric Acid ◽  
Platinum Group Metals ◽  
Metal Extraction ◽  
Phase System ◽  
Polypropylene Glycol ◽  
Hydrochloric Acid Concentration ◽  
Acid Solutions ◽  
Two Phase ◽  
Economic Point ◽  
Hydrochloric Acid Solutions

Abstract Today, metal extraction from e-waste is beneficial from both an environmental and economic point of view. Natural resources of metals, especially platinum group metals, are limited. At the same time, the amount of waste containing many valuable elements continues to grow. In this work, we studied the extraction of Pt (IV) from hydrochloric acid solutions using polypropylene glycol 425 (PPG 425). In the course of the experimental work, the dependence of the platinum extraction degree on the influence of hydrochloric acid concentration and medium pH in the polypropylene glycol 425 - sodium chloride - water system have been established. The maximum recovery (distribution coefficient > 3,5) has been achieved in the presence of 2 M HCl in an aqueous two-phase system (ATPS), which allows the use of the proposed system for the extraction of platinum from leaching solutions.

scholarly journals Separation Of Cadmium(II), Cobalt(II) And Nickel(II) By Transport Through Polymer Inclusion Membranes With Phosphonium Ionic Liquid As Ion Carrier / Separacja Jonów Kadmu(II), Kobaltu(II) I Niklu(II) W Procesie Transportu Przez Polimerowe Membrany Inkluzyjne Zawierające Fosfoniową Ciecz Jonową W Roli Przenośnika

2015 ◽  
Vol 60 (4) ◽  
pp. 2933-2938 ◽  
Author(s):  
B. Pospiech
Keyword(s):  
Ionic Liquid ◽  
Hydrochloric Acid ◽  
Cellulose Triacetate ◽  
Hydrochloric Acid Concentration ◽  
Acid Solutions ◽  
Hydrochloric Acid Solutions ◽  
Phosphonium Ionic Liquid ◽  
Aqueous Chloride ◽  
Ion Carrier ◽  
Cyphos Il 101

This paper presents study on the facilitated transport of cadmium(II), cobalt(II) and nickel(II) ions from aqueous chloride solutions through polymer inclusion membranes (PIMs) with phosphonium ionic liquid. Cyphos IL 101 (trihexyl(tetradecyl) phosphonium chloride) was used as a selective carrier for synthesis of cellulose triacetate membranes containing o-nitrophenyl pentyl ether (ONPPE) as a plasticizer. Effect of different parameters such as hydrochloric acid concentration in the source phase as well as ion carrier concentration in the polymer membrane on metal ions transport has been investigated. Cd(II) was transported preferably from hydrochloric acid solutions containing Co(II) and Ni(II) through PIM containing 18.8 wt.% CTA and 26.0 wt.% Cyphos 101 and 55.1 wt.% ONPPE into 0.5 M HNO3 as the receiving phase. The obtained results suggest that there is a possibility of application of this membrane with Cyphos IL 101 as ion carrier for separation of Cd(II) over Co(II) and Ni(II) from hydrochloric acid solutions.

scholarly journals Extraction Mechanism of Ferric and Manganese Ions with Aqueous Two-phase System Formed by Ionic Liquid and Polyethylene Glycol

2019 ◽  
Vol 33 (2) ◽  
pp. 229-234
Author(s):  
Pius Dore Ola ◽  
M. Matsumoto
Keyword(s):  
Ionic Liquid ◽  
Polyethylene Glycol ◽  
Hydrochloric Acid ◽  
Metal Salt ◽  
Phase System ◽  
Hydrochloric Acid Concentration ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
The Difference ◽  
Hcl Concentration

In this work, we employed an aqueous two-phase system formed by an ionic liquid and polyethylene glycol for the separation of Fe(III), which is the most commonly used metal in the world, and Mn(II), which is currently used in many industries. We found that the extraction mechanisms of Fe(III) and Mn(II) were strongly influenced by the concentration of the hydrochloric acid that dissolved the metal salt. The ion pair reaction was the predominant mechanism that generated the Fe(III) and Mn(II) extractions. At a lower concentration of hydrochloric acid, metal ions were extracted because of the reaction between a metal cation and a dodecylsulfonate anion. At a higher concentration of hydrochloric acid, the reaction between a metal chlorocomplex anion and a hexylmethylimidazolium cation also proceeded. The aqueous two-phase system, composed of ionic liquid and polyethylene glycol, is promising for metal separation based on the difference in the affinity of metal with alkyl-sulfonate in a low HCl concentration and in the stability constant of metal chlorocomplex in a high HCl concentration. The maximum extractability of Fe(III) and Mn(III) was 57.8 and 75.3 %, respectively, with 0.3 mol dm–3 hydrochloric acid concentration.

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