Separation of palladium by solvent extraction with methylamino-bis-N,N-dioctylacetamide and direct electrodeposition from loaded organic phase

2020 ◽  
Vol 234 ◽  
pp. 115841 ◽  
Author(s):  
Masahiko Matsumiya ◽  
Yueqi Song ◽  
Yusuke Tsuchida ◽  
Yuji Sasaki
Keyword(s):  
Solvent Extraction ◽  
Organic Phase ◽  
Direct Electrodeposition ◽  
Loaded Organic Phase

scholarly journals Solvent Extraction of Sc(III) by D2EHPA/TBP from the Leaching Solution of Vanadium Slag

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 790
Author(s):  
Xuejiao Cao ◽  
Ting-an Zhang ◽  
Weiguang Zhang ◽  
Guozhi Lv
Keyword(s):  
Solvent Extraction ◽  
Thermodynamic Analysis ◽  
Organic Phase ◽  
Species Distribution ◽  
Extraction Process ◽  
Optimal Conditions ◽  
Vanadium Slag ◽  
Extractant Concentration ◽  
Leaching Solution ◽  
Loaded Organic Phase

The solvent extraction of scandium by the mixture of di-(2-ethylhexyl) phosphate (D2EHPA) and tri-n-butyl phosphate (TBP) has been investigated in the acidic leaching solution of vanadium slag. Thermodynamic analysis of the species distribution diagrams on the Sc-S-H2O system showed that scandium mainly exists as Sc3+ and Sc(SO4)+, and sulfur mainly exists as HSO4− in the actual leaching solution of vanadium slag (pH = −0.75). The extraction process was studied to optimize various parameters such as the extractant concentration, dosage of TBP, phase ratio, and stirring speed. The results indicated that 83.64% of scandium and less than 2% of co-extracted elements were extracted under optimal conditions. Then, over 95% of the co-extracted elements and less than 1.1% of scandium were scrubbed from the loaded organic phase by 4.0 mol/L of HCl. Finally, 87.20% of scandium was stripped with 2 mol/L of NaOH and 1 mol/L of NaCl at a stripping O/A of 1:1.

scholarly journals Extraction of Lactic Acid from Whey of Yoghurt by Solvent Extraction Technique

2021 ◽  
Vol 72 (3) ◽  
pp. 102-111
Author(s):  
Jamal Stas ◽  
Marwa Yousef
Keyword(s):  
Lactic Acid ◽  
Solvent Extraction ◽  
Organic Phase ◽  
Maximum Yield ◽  
Extraction Technique ◽  
Salting Out ◽  
Operation Conditions ◽  
Nacl Concentration ◽  
Loaded Organic Phase ◽  
Solvent Extraction Technique

The aim of this paper is to investigate the possibility to recover lactic acid (LA) from the whey of yoghurt by easy and effective solvent extraction technique using tri-n-octylamine, tri-n-butyl phosphate, and their mixtures as extractant. All parameters affecting the transfer of lactic acid to the organic phase were investigated including: time of stirring, tri-n-butyl phosphate and tri-n- octylamine concentrations, organic to aqueous phase ratio, temperature, NaCl concentration as a salting out agent, and number of contacts. The maximum yield of LA extraction can be obtained by using the following operation conditions: 0.8M TOA+11% TBP, Vorg/Vaq = 4/1, t = 30 oC, [NaCl] = 2M. Complete stripping of LA from loaded organic phase can be done in 2 stages using double distilled water at 60oC and Vaq/Vorg = 20/1.

scholarly journals Study on the Effect and Mechanism of Impurity Aluminum on the Solvent Extraction of Rare Earth Elements (Nd, Pr, La) by P204-P350 in Chloride Solution

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 61
Author(s):  
Wenjie Zhang ◽  
Xian Xie ◽  
Xiong Tong ◽  
Yunpeng Du ◽  
Qiang Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Elements ◽  
Organic Phase ◽  
Extraction Process ◽  
Industrial Applications ◽  
Separation And Purification ◽  
Aluminum Ion ◽  
Hydrochloric Acid Medium ◽  
Impurity Ion

Solvent extraction is the most widely used method for separation and purification of rare earth elements, and organic extractants such as di(2-ethylhexyl) phosphoric acid (P204) and di(1-methyl-heptyl) methyl phosphonate (P350) are most commonly used for industrial applications. However, the presence of impurity ions in the feed liquid during extraction can easily emulsify the extractant and affect the quality of rare earth products. Aluminum ion is the most common impurity ion in the feed liquid, and it is an important cause of emulsification of the extractant. In this study, the influence of aluminum ion was investigated on the extraction of light rare earth elements by the P204-P350 system in hydrochloric acid medium. The results show that Al3+ competes with light rare earths in the extraction process, reducing the overall extraction rate. In addition, the Al3+ stripping rate is low and there is continuous accumulation of Al3+ in the organic phase during the stripping process, affecting the extraction efficiency and even causing emulsification. The slope method and infrared detection were utilized to explore the formation of an extraction compound of Al3+ and the extractant P204-P350 that entered the organic phase as AlCl[(HA)2]2P350(o).

scholarly journals Application of a cashew-based oxime in extracting Ni, Mn and Co from aqueous solution

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Chi M. Phan ◽  
Son A. Hoang ◽  
Son H. Vu ◽  
Hoang M. Nguyen ◽  
Cuong V. Nguyen ◽  
...  
Keyword(s):  
Organic Phase ◽  
Extraction Efficiency ◽  
Acidic Solution ◽  
Lithium Ion ◽  
Metal Extraction ◽  
Economic Potential ◽  
Cashew Nut ◽  
Valuable Metals ◽  
Loaded Organic Phase ◽  
Cashew Nut Shell

Abstract Background Cashew nut shell is a by-product of cashew (Anacardium occidentale) production, which is abundant in many developing countries. Cashew nut shell liquor (CNSL) contains a functional chemical, cardanol, which can be converted into a hydroxyoxime. The hydroxyoximes are expensive reagents for metal extraction. Methods CNSL-based oxime was synthesized and used to extract Ni, Co, and Mn from aqueous solutions. The extraction potential was compared against a commercial extractant (LIX 860N). Results All metals were successfully extracted with pH0.5 between 4 and 6. The loaded organic phase was subsequently stripped with an acidic solution. The extraction efficiency and pH0.5 of the CNSL-based extractant were similar to a commercial phenol-oxime extractant. The metals were stripped from the loaded organic phase with a recovery rate of 95% at a pH of 1. Conclusions Cashew-based cardanol can be used to economically produce an oxime in a simple process. The naturally-based oxime has the economic potential to sustainably recover valuable metals from spent lithium-ion batteries. Graphic abstract

Solvent extraction studies of the system 64Cu/Htta/topo and the role of the metal complexes involved

1970 ◽  
Vol 23 (12) ◽  
pp. 2413
Author(s):  
EB Jacobs ◽  
WR Walker
Keyword(s):  
Solvent Extraction ◽  
Metal Complexes ◽  
Organic Phase ◽  
Ternary Complex ◽  
Equilibrium Constants ◽  
Synergistic Extraction ◽  
Back Extraction

Solvent extraction studies have been carried out on the system Cu/Htta/topo (Htta = thenoyltrifluoroacetone; topo = tri-n-octylphosphine oxide) with benzene as the organic phase. Using 64Cu as a tracer, equilibrium constants have been evaluated and compared with data obtained from the back-extraction of the labelled ternary complex 64Cu(tta)2(topo). The solubilities of binary and secondary complexes that are involved in synergistic extraction have also been measured.

The supramolecular speciation: a key for improved understanding and modelling of chemical reactivity in complex systems

2003 ◽  
Vol 91 (11) ◽  
Author(s):  
Gérard Cote
Keyword(s):  
Organic Matter ◽  
Solvent Extraction ◽  
Complex Systems ◽  
Organic Phase ◽  
Chemical Reactivity ◽  
Liquid Systems ◽  
Mass Transfers ◽  
Rapid Mass

AbstractThe objective of this paper is to show through various examples that the "supramolecular" speciation is a key for the understanding and modelling of phenomena as varied as unusually rapid mass transfers in solvent extraction, organic phase splitting in liquid-liquid systems and complex behaviours of the organic matter in the environment.

Preparation of Crystalline Hematite from Bauxite

2014 ◽  
Vol 936 ◽  
pp. 1153-1157
Author(s):  
Juan Liu ◽  
Qian Qian Jiang ◽  
Jing Wang ◽  
Li Chen ◽  
Xing Yao Wang
Keyword(s):  
Hydrochloric Acid ◽  
Organic Phase ◽  
Ferric Oxide ◽  
Acid Leaching ◽  
Nano Particles ◽  
Proof Of Concept ◽  
Primary Particles ◽  
Hydrochloric Acid Leaching ◽  
Loaded Organic Phase ◽  
Xrd Patterns

A novel of hydrothermal stripping technique is developed to synthesize nano-particles of ferric oxide from iron-loaded organic phase by ammonia. The iron-loaded organic phase was prepared by extracting simulated bauxite hydrochloric acid leaching liquors with N235 and then the iron is stripped by heating the organic phase up to 180°C to precipitate as ferric oxide. XRD patterns exhibits that the ferric oxide is composed of α-Fe2O3 and TEM images reveals that the particles of crystalline hematite powders are homogenous with quasi-spherical fine crystallites and its primary particles are about 150 nm. This process is a proof of concept for the removal and precipitation of iron from bauxite hydrochloric acid leaching liquors.

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