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Wyświetlanie 1-2 z 2
Tytuł:
Infrared study of copper(II) complexes with pyridine-3-carboxamide derivatives in chloride media
Autorzy:
Borowiak-Resterna, A.
Olszanowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/346901.pdf
Data publikacji:
2004
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:
infrared spectra
solvent extraction
copper(II)
pyridine-3-carboxamide derivatives
benzamide derivatives
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.
Źródło:
Ars Separatoria Acta; 2004, 3; 105-113
1731-6340
Pojawia się w:
Ars Separatoria Acta
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ekstrahenty przemysłu hydrometalurgicznego
Extractants of hydrometallurgical industry
Autorzy:
Mądrzak-Litwa, I.
Borowiak-Resterna, A.
Powiązania:
https://bibliotekanauki.pl/articles/134823.pdf
Data publikacji:
2016
Wydawca:
ADVSEO
Tematy:
extractant
hydrometallurgy
extraction
recovery of metals
metal ores
Opis:
The rapid development of the hydrometallurgical industry is the answer to the constantly decreasing resources of rich metal ores and the need for separation of metals from low-grade ores, conglomerates and various types of industrial wastes. The development of more effective leaching methods, as well as obtaining new, selective extractants, which are used for the purification of leach solutions in an extraction-stripping step, are the reason for the great progress that has been made in this industry. The appropriate selection of the extraction conditions (pH, the concentration of an extractant, the presence of a modifier) can highlight the advantages of the extractant and minimize its disadvantages, and thereby it makes the extraction process highly efficient. The use of selective extractants in relation to the selected metal ions, reduces the total cost of the recovery of metals from ores and secondary raw materials. The requirements for extractants, and discussion of extractants main groups (acidic, alkaline, chelating, and solvating) are presented in this paper. The reactions occurring in the two-phase systems in the extraction of metal ions, and the extractants most commonly used in hydrometallurgical processes are shown.
Źródło:
Technical Issues; 2016, 3; 79-85
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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