This paper reports a study of the extraction of copper from ammonia/ammonium sulfate medium with LIX 54, a β‐diketone. The extraction of copper is very sensitive to the equilibrium pH. The highest extraction efficiency is attained in the range of pH 8–9.5. Above pH 10, the percentage of metal ion extracted decreases sharply. The extraction of copper by LIX 54 can be described …
The extraction of copper by LIX 54 can be described by the following equation: The thermodynamic equilibrium constant was evaluated in terms of the aqueous phase and was found to be 10 (2.89±0.03) M 2 at 298 K. The nonideality of the aqueous phase was taken into account by applying the Pitzer model and the extended Debye‐Hückel equation ...
The commercial extractant LIX 54-100 containing six isomeric 1-phenyldecane-1,3-diones (Dziwinski and Szymanowski, 1996) was used for the extraction of Cu(II) from acidic waste solutions...
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 LIX 54. LIX 54 acts as a modifier of LIX 84 by formation of 1:1 and 1:2 co-associates. Their structures were estimated by molecular modeling.
Development and commercialization of co pper solvent-extraction reagents . By the late 1950s, ... LIX 984N for the rst ll of the new SX–EW plant (Cognis, 2008).
Commercial extractants LIX 54-100, LIX 84 I and TOA were used to recover zinc(II) from ammonia solutions. The effect of extractant and ammonia concentration, contact time and reextraction were ...
Studies on solvent extraction of uranium(VI) by a commercially available chelating extractant LIX-54 (a β-diketone derivative) (HA) and its mixtures with tri-n-butyl phosphate (TBP) in benzene diluent show quantitative extraction by a mixture of 5% LIX-54 and 5% TBP at pH 4.3. Influence of different proportions of LIX-54 or TBP in the mixtures on the extraction of the same metal ion …
The optimum condition of extraction is 2.5 of pH value, 3:2 of volume ratio of organic material to water, 20% of mass fraction of extracting agent, 3 g·L-1 of Cu2+ mass concentration of original ...
The extraction of Cu(II) by LIX 54-100 (ß-diketone) in Iberfluid (kerosene type diluent) from ammoniacal/ammonium sulphate solutions has been investigated. The analysis of metal distribution data ...
The copper extraction with 10 % v/v LIX 984N as a function of pH was studied in pH range -0.08 to 2.5. Fig. 2 describes that copper extraction starts at -0.08 pH and quantitative extraction takes place ... pper-0.08 0.45 1.02 1.54 2.5 Equilibrium pH 0.01643 M Copper and 4 M Chloride concentration 0.008309 M Copper and 0.008 M chloride ...
LIX 64N Reagent is a water insoluble mixture of substituted oximes, which form water insoluble complexes with metallic cations, principally copper.. Chemical Reactions. LIX 64N Reagent is a hydrogen ion donor, and its chemical reactions when used as a copper extractant may be compared to an ion exchange resin system operating on a hydrogen ion cycle:. As …
A large synergic enhancement in the extraction of lanthanoids by a mixture of LIX 54 and bidentate amines is produced owing to the formation of adduct complexes with neutral ligands. The distribution ratios of lanthanoid in the extraction with LIX 54 alone and in a synergic extraction are written as D0 = = (7) and D==Kex· 1+ . (8)
This paper reports a study of the extraction of copper from ammonia/ammonium sulfate medium with LIX 54, a β‐diketone. The extraction of copper is very sensitive to the equilibrium pH. The …
Subsequently, leach liquor obtained from the oxidative leaching (0.84 g/L Cu²⁺ and 0.32 g/L Ni²⁺) was subjected to solvent extraction using LIX 84-I. Based on the extraction data, a two ...
In this study, five extractants (Acorga M5640, LIX 54, LIX 622, LIX 622 N, and LIX 864) diluted (15% (v/v)) in Shell GTL with 2.5% (v/v) octanol were compared and evaluated for Cu recovery from an ...
Ochromowicz et al. [4] and Kyuchoukov et al. [5] conducted extraction of copper(II) from ammoniacal solutions by among others a LIX 54-100. Also other metals, for example nickel, …
The extraction of copper by LIX 54 can be described by the following equation: The thermodynamic equilibrium constant was evaluated in terms of the aqueous phase and was found to be 10 M at 298 K ...
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 …
The use of LIX 54 to separate copper from ammoniacal etch solutions is described by patent applications (2–4) and an information paper of Henkel KGaA. The extraction of …
Extraction of copper using LIX 984N. Effect of equilibrium pH. Experiments were carried out at room temperature to study the effect of equilibrium pH on the extraction of 0.1M Cu(II) using 15% (v/v) LIX® 984N in kerosene. The results are presented in Figure 2 as percentage of copper extraction versus equilibrium pH. As expected, the percentage ...
ABSTRACT Extraction equilibrium data of gallium (III) from hydrochloric acid solutions with LIX 54 dissolved in kerosene were measured at 20 and 60°C. The extraction mechanism, as shown by lineal plots, involves the formation of Ga(LIX 54)3 complexes. Extraction kinetics are much faster at higher temperatures. Gallium stripping from loaded extracts can be carried out by contacting …
A novel synergistic solvent extraction (SSX) system consisting of LIX 54 and Cyanex 923 in ShellSol D70 to recover lithium and separate it from sodium in chloride solutions has been developed. With the SSX system, over 97% of lithium was extracted at pH 11 from a synthetic solution with almost no extraction of sodium in a single contact, resulting in a …
The extraction of copper by LIX 54 can be described by the following equation: The thermodynamic equilibrium constant was evaluated in terms of the aqueous phase and was …
Supporting: 1, Mentioning: 19 - 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 …
LIX 54 was introduced as a commercial reagent for the recovery of copper from ammoniacal solutions. 29 The 2: 1 complex in the extraction process shown in eqn (6) is assumed to have a planar structure analogous to that of the acetylacetonate complex shown in Fig. 9. 30 The aqueous raffinate contains a mixture of ammonium ions and ammonia which ...
The extraction of copper from ammoniacal aqueous solutions with LIX 54 was studied by using NDSX with hollow fibres as contactors. Some equilibrium experiments for the …
Copper Extraction Using LIX 84 as a Mobile Carrier in the Emulsion Liquid Membrane Process. November 2023; ... LIX 54 (0.06M) Toluene . Span 83 (8%) H 2 SO 4 (0.1M) E = 85% .
Lix 54, 26, 34 [8-10]. ... Co pper ext ra cted, g/ l. Time, min. Fig. 2. Kinetic of copper extraction by Lix 984 20%, fr om HMCCLS: pH = 0.6; Øo/Øa = 1:1. K. Elamari et al.
Abstract This paper reports a study of the extraction of copper from ammonia/ammonium sulfate medium with LIX 54, a β‐diketone. The extraction of copper is very sensitive to the equilibrium pH. The highest extraction efficiency is attained in the range of pH 8–9.5. Above pH 10, the percentage of metal ion extracted decreases sharply. The extraction …
Pranolo et al. [34] used LIX-54 and Cyanex 923 as extractants to extract Li + from chloride solutions containing Na + by liquid-liquid extraction. Paredes et al. [35] also prepared PIM using these ...
Table 4 shows some of the results obtained. As expected, the nickel extraction increased with the increase in the extractant concentration. A plot of log D Ni vs. Žlog wHRx q pH.eq ŽFig. 7. shows that the slope is near 2, which demonstrates that the Table 4 Effect of LIX 54 concentration on nickel extraction LIX 54 Ž% vrv. Ni Žgrl org .
Besides, Pranolo [37] firstly used LIX-54-100 and Cyanex 923 system as extractant to extract Li+ from chloride solutions containing Na+ via liquid-liquid extraction. Paredes [38] used this system as carrier to prepare a CTA based PIM to extract Li+ recently.
Keywords LIX 54, solvent extraction, l3-diketones, tautomerism Some commercial reagents of the f3-diketone type have been proposed for the large-scale extraction of copper from ammoniacal leach solutions. In this sense, Henkel and Hoechst manufacture, respectively, LIX 54 and Hostarex DK 16. In addition to their ability to ...
The bulk sulphide precipitate obtained after addition of Na 2 S to the Fe- and Mn-free leach liquor of manganese nodule was leached with H 2 SO 4 and the leach liquor contained 13 kg/m 3 copper, 15.6 kg/m 3 nickel, 2.6 kg/m 3 cobalt, 2.6 kg/m 3 zinc and 13.0 kg/m 3 Na 2 SO 4.Extraction of copper from this leach liquor was carried out with the extractants LIX 84-I and …
LIX ® Reagents. BASF's copper extraction reagents are based on oxime chemical structures. These reagents give up a proton (hydrogen cation) and exchange it for the Cu +2 ion. The structure of the resultant complex, called a chelate, is very specific to copper at a pH <2.5 and will reject every other metal except from a small amount of iron.