Temat: zinc extraction - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Solvent extraction of zinc(II) ions from chloride media by 4-pyridylketoximes
Autorzy:: Parus, A.
Powiązania:: https://bibliotekanauki.pl/articles/410269.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:: solvent extraction
pyridylketoxime
zinc(II)
recovery
chloride media
Opis:: Three homologues of 4-pyridylketoximes were synthesized and used as potential ligands for zinc(II). Their solvent extraction behaviors for zinc(II) in chloride solutions were investigated using CHCl3 as the diluent. The effect of different variables on the extraction of zinc(II) ions, such as the pH of aqueous phase, metal and chloride ions as well as the type of oxime, has been investigated. Results indicated that 4-pyridylketoximes could extract zinc(II) ions from chloride solutions and the extraction depended on the concentrations of the ligand, chloride ions and hydrochloride acid. Slope analysis confirmed that the 4-pyridylketoximes ligands form a 1:2 complex with zinc(II) in both chloride/nitrate and chloride/perchlorate solutions. After extraction, zinc(II) could be easily stripped from organic phase with water.
Źródło:: Chemistry, Environment, Biotechnology; 2016, 19; 93-100
2083-7097
Pojawia się w:: Chemistry, Environment, Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Lead(II) removal from aqueous solutions by solvent extraction with tetracarboxylresorcin[4]arene
Autorzy:: Konczyk, J.
Kozlowski, C.
Walkowiak, W.
Powiązania:: https://bibliotekanauki.pl/articles/110670.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: solvent extraction
lead(II)
zinc(II)
cadmium(II)
resorcinarene
Opis:: A novel tetracarboxylresorcin[4]arene was synthesized and its selective complexing ability towards Pb(II) ions was examined. The influence of several parameters such as pH of aqueous phase, agitation time, extractant and modifier concentrations on solvent extraction of Pb(II) ions from the aque-ous nitrate phase into chloroform organic phase was studied. The stoichiometry of the formed metal-ligand complexes was established by slope analysis. Pb(II) ions were quantitatively extracted in the form of 2:1 Pb(II)-resorcin[4]arene complex from aqueous solutions of pH 5.5 to the solution of ligand in chloroform. Competitive solvent extraction experiments in the presence of Zn(II) and Cd(II) ions were also carried out and high selectivity of the extractant towards Pb(II) over Zn(II) and Cd(II) was found. The selectivity order was: Pb(II) >> Cd(II) > Zn(II).
Źródło:: Physicochemical Problems of Mineral Processing; 2013, 49, 1; 213-222
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: N-(diethylthiophosphoryl)-aza[18]crown-6: synthesis and ability of solvent extraction toward lead(II), zinc(II) and cadmium(II) metal cations
Autorzy:: Kozlowska, J.
Miroshnichenko, S.
Powiązania:: https://bibliotekanauki.pl/articles/346955.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:: crown ethers
solvent extraction
lead(II)
zinc(II)
cadmium(II)
Opis:: This work presents the synthesis of a strongly hydrophobic, functionalized monaza crown ether, i.e., lariat ether, namely N-(diethylthiophosphoryl)-aza[18]crown-6 and its application as ion extractant in solvent extraction systems. The synthesis of thiophosphorylated aza[18]crown-6 was performed with good yield. Separation systems have been successfully developed to extract Pb(II), Cd(II) and Zn(II) into organic phase, i.e., chloroform with the crown ethers: aza[18]crown-6 and N-(diethylthiophosphoryl)-aza[18] crown-6 as extractants. The selectivity order in both crown ethers was Pb(II) >> Cd(II) > Zn(II). The obtained results suggest that N-(diethylthiophosphoryl)-aza[18]crown-6 can be used for the selective removal of Pb(II) at lower pH values than aza[18]crown-6.
Źródło:: Ars Separatoria Acta; 2012-2013, 9/10; 7-14
1731-6340
Pojawia się w:: Ars Separatoria Acta
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Extraction properties of tetraheptylresorcin[4]arenes in relation to Cr(III) ions
Autorzy:: Konczyk, J.
Miroshnychenko, S.
Kozlowski, C.
Powiązania:: https://bibliotekanauki.pl/articles/109751.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: solvent extraction
resorcin[4]arenes
chromium(III)
cadmium(II)
zinc ions
Opis:: Resorcin[4]arene-based ligand bearing four heptyl chains at the lower rim of the molecule was prepared and modified by four tetradietoxyphosphoryl groups in the upper rim. The compounds obtained were characterized by NMR spectroscopy and their extractability toward chromium(III) ions was studied. The influence of process parameters such as the pH of aqueous phase, agitation time and also extractant’s structure and concentration on efficiency of Cr(III) ions solvent extraction is presented. The highest yield of Cr(III) solvent extraction was obtained for two-hour agitation time of 5.010−4 M metal solution of pH 5.0 and 5.010−3 M chloroform solution of the tetradietoxyphosphorylated derivative of heptyl-resorcin[4]arene. Under optimal conditions, competitive solvent extraction of Cr(III), Zn(II), and Cd(II) ions was performed and separation factor values were established as 77.0 and 24.9 for Cr(III)/Cd(II) and Cr(III)/Zn(II) ions pairs, respectively. The stoichiometry of formed metal-ligand complexes 1:1 was found by classical slope analysis method.
Źródło:: Physicochemical Problems of Mineral Processing; 2016, 52, 2; 835-844
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Solvent extraction of zinc(II) from ammonia leaching solution by LIX 54-100, LIX 84 i and TOA
Autorzy:: Wejman-Gibas, K.
Pilsniak-Rabiega, M.
Ochromowicz, K.
Powiązania:: https://bibliotekanauki.pl/articles/109422.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: solvent extraction
zinc(II)
LIX 54-100
LIX 84 I
TOA
Opis:: 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 studied. It was found that extraction of zinc depended on the ammonia, ammonium sulphate and extractant concentration but did not depend on the contact time. The McCabe-Thiele distribution isotherm for LIX 54-100 showed that 95% of zinc(II) ions can be recovered in four stages of extraction. Reextraction of Zn(II) ions from the loaded organic phase showed that the metal can be removed almost completely using sulphuric acid.
Źródło:: Physicochemical Problems of Mineral Processing; 2017, 53, 1; 202-211
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

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.
Powiązania:: https://bibliotekanauki.pl/articles/346997.pdf
Data publikacji:: 2003
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:: polymer inclusion membrane
solvent extraction
zinc(II)
cobalt(II)
nickel(II)
copper(II)
cadmium(II)
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.
Źródło:: Ars Separatoria Acta; 2003, 2; 47-55
1731-6340
Pojawia się w:: Ars Separatoria Acta
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Quaternary phosphonium salts as effective extractants of zinc(II) and iron(III) ions from acidic pickling solutions
Autorzy:: Marszałkowska, B.
Regel-Rosocka, M.
Nowak, Ł.
Wiśniewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/778035.pdf
Data publikacji:: 2010
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: ekstraktory
cynk(II)
żelazo(III)
czwartorzędowe sole fosfoniowe
kwas chlorowodorowy
solvent extraction
zinc(II)
iron(III)
quaternary phosphonium salts
hydrochloric acid
Opis:: Extraction of zinc(II) and iron(III) from hydrochloric acid solutions using quaternary phosphonium salts, CyphosŽ IL 101, CyphosŽ IL 104, CyphosŽ IL109 and CyphosŽ IL 111 in mixtures with toluene, was studied. Trihexyl(tetradecyl)phosphonium chloride (CyphosŽ IL 101) and trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate (CyphosŽ IL 104) showed the best zinc(II) and iron(III) extraction abilities. After three stages of zinc(II) extraction with CyphosŽ IL 101 and CyphosŽ IL 104 the efficiencies were 100 and 93.6%, respectively. Total iron(III) transport to the organic phase was achieved after two separation stages and amounted to 82.1 and 100% for CyphosŽ IL 101 and CyphosŽ IL 104, respectively. Zinc(II) and iron(III) could be effectively stripped from the loaded organic phases with 0.5 mol dm-3 sulfuric acid. The more hydrophobic the character of the anion type of phosphonium salts, the lower the efficiency of extraction.
Źródło:: Polish Journal of Chemical Technology; 2010, 12, 4; 1-5
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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