The mining industry has been leaching copper since the late 1960’s from oxide ores, low grade secondary sulfide ores, and primary sulfide concentrates with aqueous acid or ammonia solutions, followed by solvent extraction (SX. Over time, the LIX® reagents (aldoxime and ketoxime chelating agents) used in these solvent extraction processes have become more efficient, more selective and
Description LIX 84-I solvent extraction reagent is water insoluble 2-hydroxy-5-nonylaceto- phenone oxime in a high flash point hydrocarbon diluent. Principal uses LIX 84-I forms water insoluble complexes with various metallic cations in a manner similar to that shown below for copper: 2RH (org) + Cu+2 (aq) R 2Cu (org) + 2H (aq)
At the core of BASF's solvent extraction offering is an extensive range of LIX ® oxime extractants that are widely used in the purification of copper leach solutions. Oxime formulations can be tailored to meet individual customer requirements and are suitable for a wide range of leach solutions.
Nickel and copper were co-extracted from ammoniacal ammonium sulfate leach liquors (pH-9.5) with LIX 64N extractant in a laboratory-size mixer-settler continuous circuit. Three extraction stages resulted in >99-pct extraction of nickel, substantial copper extraction, and essentially no cobalt extraction
19/11/2009· Extraction of copper from the leach liquor was carried out with 15 vol.% LIX 84-I and LIX 622N in kerosene within the initial pH range 0.1–4.6 at 1:1 phase ratio, but the equilibrium pH was within 0.23–1.27 for LIX 84-I and 0.18–1.19 for LIX 622N.
The paper presents results of extraction of copper(II) from ammonia leach solutions. The effect of a type of extractant, its concentration and type of diluent in organic phase on extraction efficiency and ammonia transfer was studied. A few commercial extractants were examined, namely LIX 84-I, LIX 984N, LIX 54-100. The results clearly indicate
The speciation of copper in chloride solutions up to 0.50 M ionic strength has been modelled using the SIT theory. • The extraction of Cu from HCl and HCl-KCl solutions by LIX
The amount of copper(II) extracted by LIX 54 used alone is very low. The interfacial activity of ACORGA CLX-50 in the toluene/water system is much higher in comparison with LIX 54. The observed
Copper recovery using leach/solvent extraction/electrowinning technology 65 (Figure 2) and a catalytic amount of LIX 63, was introduced in 19657 and in March 1968 the first commercial copper L/SX/EW operation, the Bluebird plan of Ranchers
These three oximes form the basis for a wide range of reagents which are derived by blending the oximes in a variety of ways, for example, with diluent, with one another or with a modifier, to give LIX Copper Solvent Extraction Reagents with properties that best fit the particular leach solution and plant design under consideration.
At the core of BASF's offering is an extensive range of LIX ® oxime extractants and amine extractants that are widely used in the purification of copper, uranium, nickel, vanadium, molybdenum, germanium, palladium, rare earths and other precious metals from leach solutions.
%LIX for separation of copper and nickel at pH 2. Also at pH 2, the influence of %LIX on extraction of copper was found by contacting the aqueous feed solution with varying concentration of LIX (v/v) in kerosene. With maximum amount of copper getting extracted at this pH of 2, the raffinate phase has nickel remaining in it.
COGNIS, supplier of LIX®Reagents and inventor of copper solvent extraction (SX), has been the recognized market and technology leader for more than 45 years. Independent studies show LIX® Reagents are 10 25% more efficient than the competitive products and are used to produce over 60% of the world’s SX copper cathode.
Extraction of copper from water using LIX 84 extractant was investigated. Binary equilibrium data are reported and predictive models have been developed.
If, in addition, the reaction between LIX and copper proceeds to completion, then the behavior would be as follows: When LIX is fed in excess, all copper is extracted from the water phase. When LIX is not in excess, the copper removal will be a linear function of the LIX feed rate. Note that these are testable predictions of the theory.
(1982) investigated the extraction of copper and zinc by using LIX 34 and Versatic 911 acid and their mixtures and observed that no synergism was found when Versatic acid was added. Zinc and copper can also be extracted from sulphate media by carboxylic acids (Preston et al. 1985 b). The relative order of extraction with increasing pH found to
extracting copper from copper-rich leach liquors. There are few reports available regarding equilibrium studies of the copper-LIX® 984N system (Aminian and Bazin, 2000) and the separation of copper and nickel from sulphate medium (Ochromowicz and Chmielewski, 2013). The present study investigates the extraction equilibrium in the copper-LIX®
The copper extracted into the inner strip phase was calculated. 3. Results Extraction of copper by LIX can be described as: 2 2HR Cu CuR 2H org aq 2org aq ++ + + . Here HR is the extractant and aq. and org. are the aqueous and organic phases, respectively. K ex, the extraction equilibrium constant for extraction of Cu with LIX can be
technology in recent years. The role of SX in copper production is irrefutable. International Copper Study Group estimates that solvent extraction electrowinning (SX-EW) production of copper is expected to increase by 4.4% annually to reach 5.2 Tg (megatones) in
Conventional Copper Extraction . Conventionally, copper is recovered by a pyrometallurgical process known as smelting. In this process copper ore is mined, crushed, ground, concentrated, smelted and refined. The mining, crushing and grinding portions of the processing are extremely energy intensive since the rock must be reduced essentially to
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Extraction of copper from water using LIX 84 extractant was investigated. Binary equilibrium data are reported and predictive models have been developed. With a simple, concentration-based equilibrium model, an equilibrium constant of 3.9 was obtained. This model is adequate when no acid is present in the aqueous phase. As the acidity of the aqueous phase increases, nonideality becomes
Extraction of copper from ammoniacal solutions with LIX 84 and LIX 54 used alone and their mixture was studied, and a chemical model was proposed and verified. The equilibrium extraction constant was correlated with the ionic strength. The effect is weak for the strong extractant LIX 84 and its mixture but very strong for the weak extractant
Extraction isotherm of copper by Lix 984 20% v/v from HMCCLS; Øo/Øa = 1.5:1, pH = 1.7. Table 1. Effect of the solution pH on the extraction of Cu, Zn, Fe and Pb by Lix 984 20% v/v from HMCCLS. Elements extraction, % PH Cu Fe Zn Pb 0.6 28 0 0 0 1.7 51 0 0 0 . J. Min. Met. 42 B (2006) K. Elamari et al. 8 which is more employed for the recovery of copper from oximes, and in which the
LIX®84-I LIX 84-I solvent extraction reagent is water insoluble 2-hydroxy-5-nonylacetophenone oxime in a mixture with a high flash point hydrocarbon diluent. It forms water insoluble complexes with various metallic cations in a manner similar to that for copper which is described in the following equation: 2RH(org) + Cu +2 (aq) R2Cu(org) + 2H + (aq) Copper extraction from typical leach
Separation of copper and nickel by liquid-liquid extraction from aqueous solutions was studied using LIX 664N in kerosene as solvent. Both metals were taken in their sulfate form and ratio of copper to nickel in feed solutions was maintained as 10:1. LIX 664N concentration in kerosene was varied from 10% to 40% (v/v) and its effect was studied on percent extraction of copper and nickel for
Copper solvent extraction from alkaline cyanide solution with guanidine extractant LIX 7950 F. XIE, D. B. DREISINGER Department of Materials Engineering, University of British Columbia, Vancouver, BC, Canada V6T 1N6 Received 4 June 2009; accepted 3 September 2009 Abstract: The use of the guanidine extractant LIX 7950 extracting copper and
extraction of base metals zinc (Zn), manganese (Mn), copper (Cu), cobalt (Co) and nickel (Ni), the extractants, such as D2EHPA and PC 88A are considered suitable extractant (Thakur, 1998). Oxime reagents like LIX 87 QN, LIX 54, LIX 973, LIX 984 and LIX 34 are used for the extraction, separation and recovery of copper, nickel and
Because of falling copper prices on the world market, MRT ceased the copper extraction in September 1998 and applied to the Spanish authorities for a temporary lay-off, an administrative situation whereby work contracts are suspended over a limited period and the workers qualify for unemployment benefits.
29/01/2019· Abstract. In this research, a synergetic system of solvent extraction process was developed to recover copper from aqueous solutions with tri-n-butyl phosphate (TBP), di-2-ethyl hexyl phosphoric acid (D2EHPA) and methyl iso-butyl ketone (MIBK).
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