Temat: copper solvent extraction

Skocz do pozycji: 1.

Tytuł:: Copper recovery from chalcopyrite concentrate acid leach solutions by Acorga M5397
Autorzy:: El Amari, K.
Jdid, E.-A.
Blazy, P.
Tematy:: copper solvent extraction
solvent extraction selectivity
nitro-fluorosilic acid
AcorgaM5397; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/110601.pdf Link otwiera się w nowym oknie
Opis:: Chalcopyrite concentrate from Hajar Mine, Morocco, was leached with nitro-fluosilicic acid leach solution. The pregnant leach solution obtained contained 19.3 g/dm3 Cu, 18.1 g/dm3 Fe, 4.5 g/dm3 Zn and 0.03 g/dm3 Pb. Copper recovery from this pregnant leach liquor was performed by solvent extrac-tion using Acorga M5397 diluted in Escaid 110. McCabe–Thiele distribution isotherms showed that at pH 1.7 complete and selective copper extraction can be achieved with φo/φa =1.5/1 in 3 stages of extraction. Stripping of the loaded copper by treating the organic phases by a fresh sulphuric acid solution was easily realized.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Solvent extraction of copper(II) from chloride solutions using 1,1′-dialkyl-2,2′ bibenzimidazoles as extractants
Autorzy:: Mądrzak-Litwa, Iwona
Borowiak-Resterna, Aleksandra
Tematy:: copper
solvent extraction
metal removal
chloride solution
2,2′-bibenzimidazole; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/110851.pdf Link otwiera się w nowym oknie
Opis:: The solvent extraction ability of 1,1′-dialkyl-2,2′-bibenzimidazoles (L) for the recovery of copper(II) ions from aqueous chloride solutions has been investigated. It was found that 1,1′-didecyl- 2,2′-bibenzimidazole is a useful extractant for the separation of copper(II) ions from both weakly and strongly acidic solutions. Copper(II) can be effectively stripped of organic solutions by a water or ammonia solution in a one-stage process. In low acidity media (pH_feed> 1), the extraction percentage of Cu(II) increases with an increase in metal ions and chloride concentrations. Copper(II) ions are extracted as binuclear complexes (CuCl₂) ₂L₂ (L = extractant). The constructed McCabe−Thiele diagram shows that the reduction of copper(II) ions concentration from 25 to approximately 5 g/dm³ in an aqueous feed is possible in two extraction stages. When [HCl] _feed ≥ 1 M, (LH⁺)₂(CuCl₄²)L complex is formed. From the strongly acidic solutions ([HCl] = [LiCl] = 4 M), almost 100% of copper(II) ions can be removed by 1,1′-didecyl-2,2′-bibenzimidazole. Benzyl alcohol, used as an organic phase modifier, enables the selective extraction of copper(II) over zinc(II) ions from a weakly acidic chloride solution.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Infrared study of copper(II) complexes with pyridine-3-carboxamide derivatives in chloride media
Autorzy:: Borowiak-Resterna, A.
Olszanowski, A.
Tematy:: infrared spectra
solvent extraction
copper(II)
pyridine-3-carboxamide derivatives
benzamide derivatives; Pokaż więcej
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Powiązania:: https://bibliotekanauki.pl/articles/346901.pdf Link otwiera się w nowym oknie
Opis:: The extraction studies for copper(II) from chloride solutions by mono- and dialkyl derivatives of benzamide and pyridine-3-carboxamide show that the coordination of copper by amide groups is very weak, weaker than by chloride ions. N,N-dialkyl derivative of benzamide does not extract copper from chloride media but N-alkylbenzamide eliminates a small amount of copper (a great deal smaller than pyridine-3-carboxamide derivatives) only from diluted chloride aqueous solutions ([Cl-] < 0.1 M). Infrared studies of copper complexes with mono- and dialkylpyridine-3-carboxamides show that coordination of the ligand molecules to copper(II) ions takes place mainly by the pyridine nitrogen. More stable monoalkylpyridinecarboxamides complexes with CuCl2 are formed probably by intermolecular hydrogen bonds between monomeric molecules of CuCl2L2 complex (L – the amide). However, weak coordination of copper(II) by the amide group may take place.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Zinc(II) selective removal from other transition metal ions by solvent extraction and transport through polymer inclusion membranes with D2EHPA
Autorzy:: Ulewicz, M.
Walkowiak, W.
Pośpiech, B.
Tematy:: polymer inclusion membrane
solvent extraction
zinc(II)
cobalt(II)
nickel(II)
copper(II)
cadmium(II); Pokaż więcej
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Powiązania:: https://bibliotekanauki.pl/articles/346997.pdf Link otwiera się w nowym oknie
Opis:: An experimental investigation concerns zinc(II), cobalt(II), nickel(II), copper(II) and cadmium(II) ions separation from aqueous chloride solutions by solvent extraction and transport through polymer inclusion membrane (PIM) processes. The selective transport of metal ions from the aqueous chloride source phase through PIM containing cellulose triacetate (support), o-nitrophenyl pentyl ether (plasticizer) and di(2-ethylhexyl)phosphoric acid (ion carrier) is shown. Zn(II) can be effectively removed from dilute aqueous chloride solutions by its transport through PIMs with di(2-ethylhexyl)phosphoric acid as the ionic carriers into 1.0 M HCl as the receiving phase. The transport selectivity of Zn(II) over Co(II), Ni(II), Cu(II) and Cd(II) decreases while the pH of the solution increases in the source phase. Also, by solvent extraction, Zn(II) can be selectively removed from dilute aqueous chloride solutions.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Separation of palladium(II) from mixtures of non-ferrous metal ions by solvent extraction
Autorzy:: Radzyminska-Lenarcik, E.
Witt, K.
Tematy:: metal separation
cobalt(II)
nickel(II)
copper(II)
palladium(II)
solvent extraction
alkylimidazole
separacja metali
kobalt(II)
nikiel(II)
miedź(II)
pallad(II)
ekstrakcja rozpuszczalnikiem
alkiloimidazole; Pokaż więcej
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Powiązania:: https://bibliotekanauki.pl/articles/115497.pdf Link otwiera się w nowym oknie
Opis:: The possibility of Pd(II) ions separation from mixtures of Co(II), Ni(II), Cu(II) and Pd(II) ions by solvent extraction was studied, using 1-hexyl-2methylimidazole in chloroform as the extractant. The initial concentration of each ion was 10 mM. The tests were carried out at a temperature of 25°C, at a constant strength of the aqueous solution of I = 0.5, as maintained by the KCl solution. It was demonstrated that differences in the stability and structure of their coordination sphere as well as solubility of complexes with the extractant could be used for separating the Co(II), Ni(II), Cu(II) and Pd(II) ions by solvent extraction. Pd(II), which forms flat-square complexes in the solutions, passes easily into the organic phase and is easier separated from the mixture of Co(II), Ni(II), Cu(II) ions, which form octahedral or tetrahedral complexes. Extraction percentages were calculated. For the respective metals, their values increase for increasing concentrations of the extractant in the aqueous phase. The extraction percentage decreases in the following order: Pd(II) > Cu(II) > Co(II) > Ni(II). In the case of the quaternary mixture, the highest extraction percentage for Pd(II) (70%) was obtained at a pH=7.33. Separation coefficients were also calculated. The highest separation coefficients were obtained for the system: Pd(II)/Ni(II), Pd(II)/Co(II); at a pH of 5.4 for an aqueous solution, their values are 13.3 and 7.7, respectively.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "copper solvent extraction" wg kryterium: Temat