scholarly journals Copper solvent extraction from chalcopyrite concentrate acid leach solutions by LIX 984

2006 ◽  
Vol 42 (1) ◽  
pp. 1-11
Author(s):  
K. Elamari ◽  
E.A. Jdid ◽  
P. Blazy
Keyword(s):  
Solvent Extraction ◽  
Sulphuric Acid Solution ◽  
Leach Solution ◽  
Copper Production ◽  
Copper Extraction ◽  
Solid Product ◽  
Acid Leach ◽  
Concentrate Acid ◽  
Hydrometallurgical Treatment ◽  
Chalcopyrite Concentrate

Copper production from ores or sulphide concentrates is classically realized by pyrometallurgical route. In this study, hydrometallurgical treatment of a copper sulphide concentrate, provided by Hajar Mine (ONA-Group, Morocco), was tested by using a mixture of nitric and hexafluorosilicic acids. Copper is present in the solid product as chalcopyrite and its amount is 28.1 % by weight. Leaching stage allows to dissolve more than 90% of copper witch is accompanied, in the same averages, by Zn and Fe. The leach solution obtained has pH = 0.6 and Eh = 580 mV/ENH and contains 19.3 g/L Cu, 18.1 g/L Fe, 4.5 g/L Zn and 0.03 g/L Pb. The recovery of copper from this leach solution was curried out by solvent extraction using Lix 984, diluted in Escaid 110. McCabe - Thiele distribution isotherms showed that at pH 1.7 total and selective copper extraction can be realized with ?o:?a =1.5:1 in 3 extraction stages. Stripping of the loaded copper by treating the organic phases was easily obtained by a sulphuric acid solution.

Selective solvent extraction of vanadium over iron from a stone coal/black shale acid leach solution by D2EHPA/TBP

2011 ◽  
Vol 105 (3-4) ◽  
pp. 359-363 ◽  
Author(s):  
Xingbin Li ◽  
Chang Wei ◽  
Zhigan Deng ◽  
Minting Li ◽  
Cunxiong Li ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Black Shale ◽  
Leach Solution ◽  
Selective Solvent ◽  
Stone Coal ◽  
Acid Leach ◽  
Selective Solvent Extraction

Solvent extraction process for the selective recovery of copper and cobalt from carrollite leach solution

2019 ◽  
Vol 116 (3) ◽  
pp. 309
Author(s):  
Bo Dong ◽  
Jian-hui Wu ◽  
Jun Wu ◽  
Xian-peng Zhang ◽  
Jing-jun Zhai
Keyword(s):  
Solvent Extraction ◽  
Acid Solution ◽  
Sulphuric Acid ◽  
Extraction Process ◽  
Sulphuric Acid Solution ◽  
Leach Solution ◽  
Two Stage ◽  
Simultaneous Extraction ◽  
Initial Ph ◽  
Sulfonated Kerosene

A solvent extraction application consisting of three-sequential solvent extraction steps to selectively recover the copper and cobalt from carrollite leach solution was conceived and experimentally explored. The first step allowed the simultaneous extraction of 95.5% copper, 0.87% cobalt and 4.79% iron using 20% Lix984 in sulfonated kerosene and O/A ratio of 1 at initial pH of 2. Two-stage scrubbing at pH = 4 using diluted sulphuric acid solution allowed the removal of most of the cobalt (98.56%), iron (97.25%) and small amount of copper (0.36%). Complete stripping of copper was achieved at H2SO4 concentration of 1.5 mol/L and an O:A ratio of 1. This raffinate was the feed for the second step. The use 30% P204 in sulfonated kerosene, sodium-saponification rate of 30% and initial pH of 2.5 allowed the removal of 100% iron, 98.45% zinc, 93.64% calcium and 22.77% magnesium under the O:A ratio of 1 but with substantial co-removal of cobalt (8.23%). Two-stage scrubbing of this loaded organic phase at pH = 2.5 using diluted sulphuric acid solution allowed the extraction of most of the cobalt (92.75%). This raffinate was the feed for the third step. The simultaneous extraction of 99.08% cobalt, 5.12% magnesium and 2.87% nickel was found using 35% P507 in sulfonated kerosene, sodium-saponification rate of 65% and initial pH of 4 at an O:A ratio of 1:2. Two-stage scrubbing at pH = 3.5 using diluted sulphuric acid solution allowed the removal of most of the magnesium (96.82%), nickel (93.49%) and small amount of cobalt (2.87%). Complete stripping of cobalt was achieved at H2SO4 concentration of 1.0 mol/L at an O:A ratio of 3:1. Meanwhile, as long as the phase ratio (O/A) of extraction and stripping were properly controlled, this diluted cobalt solution can be concentrated before being sent to a subsequent step such as recovery of the metal by electrowinning. Based on the experimental results, a flowsheet for the extraction process is presented.

scholarly journals PRELIMINARY STUDY ON SEPARATION OF RARE EARTH METALS FROM LEACH SOLUTION OF DISCARDED FLUORESCENT POWDER BY SOLVENT EXTRACTION

2018 ◽  
Vol 56 (2C) ◽  
pp. 133-139
Author(s):  
Nguyen Duc Quang
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Room Temperature ◽  
Rare Earth Metals ◽  
Leach Solution ◽  
Extractant Concentration ◽  
Fluorescent Lamps ◽  
Fluorescent Powder ◽  
Acid Leach ◽  
Counter Current

Discarded fluorescent lamps were considered as hazardous waste in Vietnam (code is 160106). However, its composition contained valuable rare earth metals, which can be recycled and recovered by leaching and solvent extraction processes. The present study sought to define the conditions of separation for rare earth elementals (REEs) from acid leach solution by solvent extraction using PC88A. The acid leach solution was obtained from leaching of fluorescent powder. Efficiencies on REEs extractions as functions of pH levels, extractant concentration, O/A ratio, metal concentration were investigated. For pH values greater than 0.0 and less than 1.0, the orders of the yields extraction were determined: yttrium > terbium > europium > aluminum and calcium. The best separation circuit included four-stage counter current extraction for yttrium separation with 20 %v/v PC88A in kerosene (O/A = 1/1, room temperature, 20 min of contact, pH of 0.38) and stripping step with 3 M HCl acid (O/A = 1/1, room temperature, 30 min of contact). After yttrium separation, the leach solution was extracted at pH of 0.98 in the same other conditions with two-stage counter current extraction to recover terbium and europium group. The final recovery from leach liquor was higher than 98 % and the grade of the final product was 94.2 % (for yttrium) and 93.8 % (for terbium and europium group).

Investigating and Optimization of Copper Extraction from Chalcopyrite Concentrate with Hydrogen Peroxide in Presence of Acetic Acid

2017 ◽  
Vol 7 (4) ◽  
Author(s):  
Mehmat Deniz Turan ◽  
Musa Sarikaya ◽  
Z. Abidin Sari ◽  
Ahmet Haxhiaj ◽  
Tolga Depci ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Copper Extraction ◽  
Chalcopyrite Concentrate

Effects of Copper Extraction-Stripping Loops on Entrainment in Aqueous Raffinate

2014 ◽  
Vol 908 ◽  
pp. 18-21
Author(s):  
Yan Jun Liu ◽  
Xiao Rong Liu ◽  
Hui Li ◽  
Yong Sheng Li ◽  
Qing Li ◽  
...  
Keyword(s):  
Surface Tension ◽  
Solvent Extraction ◽  
Early Stage ◽  
Organic Chemical ◽  
Copper Extraction ◽  
Organic Chemicals ◽  
Stabilization Mechanism ◽  
Absolute Value ◽  
Copper Solvent Extraction ◽  
Average Size

Effects of extraction-stripping loops of organic phase on organic chemical entrainment in the aqueous raffinate in copper solvent extraction were studied in this paper. Results demonstrated that the total amount of organic chemicals lost in the aqueous raffinate decreased with the increase of times of extraction-stripping loops but reached largest at third loop. Entrainment was the dominate way of organic chemicals losing in the aqueous raffinate at early stage of the loops. The formation of entrainment and its stabilization mechanism was also studied. The average size of entrained droplet trended to increase with extraction-stripping loops increasing. Meanwhile, the absolute value of zeta potential trended to decrease. The surface tension of the aqueous raffinate increased after reaching the minimum value 41.3 mN/m at the 3rd loop. It showed that the formation of entrained droplets and its stability were mainly affected by the surface tension of aqueous raffinate.

scholarly journals Recovery of Platinum from a Spent Automotive Catalyst through Chloride Leaching and Solvent Extraction

Recycling ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 27
Author(s):  
Ana Méndez ◽  
Carlos A. Nogueira ◽  
Ana Paula Paiva
Keyword(s):  
Solvent Extraction ◽  
Environmental Sustainability ◽  
Catalytic Converter ◽  
Reaction Times ◽  
Model Solution ◽  
Critical Metals ◽  
Experimental Conditions ◽  
Chloride Leaching ◽  
Good Potential ◽  
Hydrometallurgical Treatment

Considering economics and environmental sustainability, recycling of critical metals from end-of-life devices should be a priority. In this work the hydrometallurgical treatment of a spent automotive catalytic converter (SACC) using HCl with CaCl2 as a leaching medium, and solvent extraction (SX) with a thiodiglycolamide derivative, is reported. The aim was to develop a leaching scheme allowing high Pt recoveries and minimizing Al dissolution, facilitating the application of SX. The replacement of part of HCl by CaCl2 in the leaching step is viable, without compromising Pt recovery (in the range 75–85%), as found for the mixture 2 M CaCl2 + 8 M HCl when compared to 11.6 M HCl. All leaching media showed good potential to recover Ce, particularly for higher reaction times and temperatures. Regarding SX, results achieved with a model solution were promising, but SX for Pt separation from the real SACC solution did not work as expected. For the adopted experimental conditions, the tested thiodiglycolamide derivative in toluene revealed a very good loading performance for both Pt and Fe, but Fe removal and Pt stripping from the organic phases after contact with the SACC solution were not successfully accomplished. Hence, the reutilization of the organic solvent needs improvement.

scholarly journals Effect of iron powder on copper extraction by acid leaching of chalcopyrite concentrate.

1996 ◽  
Vol 29 (4) ◽  
pp. 720-722 ◽  
Author(s):  
Ezequiel Cruz Sanchez ◽  
Yoshiaki Umetsu ◽  
Fumio Saito
Keyword(s):  
Iron Powder ◽  
Acid Leaching ◽  
Copper Extraction ◽  
Chalcopyrite Concentrate

Diversity of Bioleaching Microorganisms in Interfacial Emulsion of Copper Solvent Extraction

2015 ◽  
Vol 1130 ◽  
pp. 55-58
Author(s):  
Xiao Rong Liu ◽  
Chang Su ◽  
Dao Jie Chi ◽  
Xue Song Zheng ◽  
Hua Long Yu ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
16S Rrna ◽  
Acidithiobacillus Ferrooxidans ◽  
Gene Sequencing ◽  
16S Rrna Gene Sequencing ◽  
Extraction Process ◽  
Copper Extraction ◽  
Rrna Gene ◽  
Copper Solvent Extraction ◽  
Rrna Gene Sequencing

In the bioleaching - solvent extraction - electrowinning practices for copper extraction, the solvent extraction process is used to enrich the copper in the leachate to a high lever to make the sequent electrowinning process possible. O/W type of interfacial emulsion always forms at the interface between organic phase and aqueous phase in the solvent extraction practices. Diversified microorganisms were discovered by microscope growing in the interface emulsion of copper solvent extraction. The diversity of them was analyzed by using 16s rRNA gene sequencing. It was indicated that there exist seven categories of bacteria in the interface emulsion, among which common bioleaching bacteria, such as Leptospirillum sp.,Acidithiobacillus ferrooxidans, Metallibacterium sp., are included. The dominant strains are Leptospirillum sp. E4-L9 and Acidithiobacillus ferrooxidans ATCC 23270, which account up to 40.48 % and 38.1 %, respectively. It was uncovered that bioleaching bacteria can be intercepted by interfacial emulsion of solvent extraction to make their population in the raffinate lower and the efficiency of bioleaching decrease consequently.

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