scholarly journals Characterisation of Parameters Influencing the Phase Separation in Copper Solvent Extraction Systems Using Oxime-Type Extractants for the Field Operation

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1785
Author(s):  
Sangyun Seo ◽  
Gwang Seop Lee ◽  
Hye Rim Kim ◽  
Jong-Gwan Kim
Keyword(s):  
Phase Separation ◽  
Solvent Extraction ◽  
Extraction Process ◽  
Ore Deposits ◽  
Copper Production ◽  
Extraction System ◽  
Low Grade ◽  
Solution Ph ◽  
Field Operation ◽  
Solvent Extraction System

Solvent extraction (SX) is one of the most widely applied hydrometallurgical processes in copper production from oxide ore. As the high-grade ore deposits have been developed and depleted, now only low-grade ore deposits are being developed and are therefore facing obstacles of extreme processing conditions. This results in leaching gangue minerals and requires a more complicated solvent extraction system. Recently, synergistic solvent extraction has been introduced to separate copper from the leached solution with high impurities. However, operational obstacles arise due to the complicated solvent extraction process, including multi-stages of extraction, and using more than one extractant in a single solvent extraction system. The phase separation in solvent extraction is one of the major issues in field operation. A poor phase separation could affect the entire process and eventually cause production loss. Therefore, in this study, the phase separation behaviours were studied in consideration of the field operation. Major parameters considered in the study were the type of diluent, temperature, mixing speed, solution pH and Oxidation Reduction Potential (ORP), and addition of impurities (flocculant and colloidal silica). The phase separation behaviours in the continuous counter-current SX system using a pilot-scale mixer-settler in the above conditions was investigated.

Thermodynamics of Solvent Extraction of Perrhenate with N235 at High Concentration

2010 ◽  
Vol 150-151 ◽  
pp. 890-894
Author(s):  
Ke Xu Jiang ◽  
Da Wei Fang ◽  
Han Wang ◽  
Bao Xin Wang ◽  
Ying Xiong ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Aqueous Phase ◽  
Supporting Electrolyte ◽  
Extraction Process ◽  
Extraction System ◽  
Thermodynamic Quantities ◽  
High Concentration ◽  
Extraction Constants ◽  
Solvent Extraction System

In solvent extraction system of perrhenate with the extractant of N235 at high concentration, the equilibrium molalities of ReO4- were measured at ionic strengths from 0.2 to 2.0 mol.kg-1 in the aqueous phase containing Na2SO4 as the supporting electrolyte from 278.15K to 303.15K. The standard extraction constants K0 at various temperatures were obtained. Thermodynamic quantities for the extraction process were also calculated.

scholarly journals Development of an autonomous solvent extraction system to isolate astatine-211 from dissolved cyclotron bombarded bismuth targets

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Matthew J. O’Hara ◽  
Anthony J. Krzysko ◽  
Donald K. Hamlin ◽  
Yawen Li ◽  
Eric F. Dorman ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Specific Activity ◽  
Alpha Decay ◽  
Small Mass ◽  
Extraction Process ◽  
Extraction System ◽  
Solvent Extraction System ◽  
Two Phases ◽  
The University ◽  
Alpha Therapy

AbstractCyclotron-produced astatine-211 (211At) shows tremendous promise in targeted alpha therapy (TAT) applications due to its attractive half-life and its 100% α-emission from nearly simultaneous branched alpha decay. Astatine-211 is produced by alpha beam bombardment of naturally monoisotopic bismuth metal (209Bi) via the (α, 2n) reaction. In order to isolate the small mass of 211At (specific activity = 76 GBq·µg−1) from several grams of acid-dissolved Bi metal, a manual milliliter-scale solvent extraction process using diisopropyl ether (DIPE) is routinely performed at the University of Washington. As this process is complex and time consuming, we have developed a fluidic workstation that can perform the method autonomously. The workstation employs two pumps to concurrently deliver the aqueous and organic phases to a mixing tee and in-line phase mixer. The mixed phases are routed to a phase settling reservoir, where they gravity settle. Finally, each respective phase is withdrawn into its respective pump. However, development of a phase boundary sensor, placed in tandem with the phase settling reservoir, was necessary to communicate to the system when withdrawal of the denser aqueous phase was complete (i.e., the intersection of the two phases was located). The development and optimization of the autonomous solvent extraction system is described, and the 211At yields from several ~1.1 GBq-level 211At processing runs are reported.

scholarly journals Solvent Extraction Equilibrium in the CuSO4–H2SO4–LIX 984–ESCAID 103 Systern

1999 ◽  
Vol 23 (8) ◽  
pp. 518-519
Author(s):  
Francisco Jose Alguacil ◽  
Jaime Simpson ◽  
Patricio Navarro
Keyword(s):  
Solvent Extraction ◽  
Thermodynamic Model ◽  
Distribution Coefficients ◽  
Extraction System ◽  
Extraction Equilibrium ◽  
Solvent Extraction System ◽  
Measured Distribution

A previously determined thermodynamic model for extraction equilibrium is used as a basis to predict experimentally measured distribution coefficients for the CuSO4–H2SO4–LIX 984–Escaid 103 solvent extraction system at 25 °C and aqueous copper concentrations in the range 0.01–2.0 gL−1, the copper loading isotherm is also obtained.

A novel process on separation of manganese from calcium and magnesium using synergistic solvent extraction system

2019 ◽  
Vol 185 ◽  
pp. 55-60 ◽  
Author(s):  
Yingsong Wang ◽  
Li Zeng ◽  
Guiqing Zhang ◽  
Wenjuan Guan ◽  
Zhen Sun ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Extraction System ◽  
Solvent Extraction System ◽  
Calcium And Magnesium ◽  
Synergistic Solvent Extraction
Sign in / Sign up

Export Citation Format

Share Document