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    Wyświetlanie 1-9 z 9
    Tytuł:
    Separation of nickel and zinc ions in a synthetic acidic solution by solvent extraction using D2EHPA and Cyanex 272
    Autorzy:
    Gharabaghi, M.
    Irannajad, M.
    Azadmehr, A. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/110275.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    D2EHPA
    Cyanex 272
    nickel extraction
    zinc extraction
    Opis:
    Solvent extraction was used to recover nickel and zinc from synthetic acidic solution. Many leaching solution and waste waters contain both zinc and nickel at the same time. Bis (2,4,4trimethylpentyl) phosphinic acid (Cyanex 272) and Di(2-ethylhexyl) phosphoric acid (D2EHPA) were used to separate nickel and zinc. In the D2EHPA system, at equilibrium pH of 2, zinc extraction was more than 98% whereas nickel extraction was only 0.36%. The extraction of metals was found to increase with an increase of pH of the aqueous phase. At equilibrium pH 3.5, zinc extraction was completed and higher than 99% zinc was extracted using Cyanex 272. The maximum nickel extractions using D2EHPA and Cyanex 272 were achieved at equilibrium pH 4.5 and 7.5, respectively. Both extractants showed the relatively good separation levels between nickel and zinc. D2EHPA and Cyanex 272 isotherms for single metal solutions showed that the extraction order was Zn2+>Ni2+. ΔpH1/2 value showed that the separation of nickel and zinc using Cyanex 272 was simpler than D2EHPA system. The stripping study was performed using sulphuric acid and it was shown that above 98% zinc and nickel could be extracted. These results demonstrated separation of zinc and nickel from sulphate solutions to be favorable.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 1; 233-242
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The synergistic effect on Cr(III) ions transport through SLM with carrier mixtures
    Transport Cr(III) przez immobilizowaną membranę ciekłą
    Autorzy:
    Łobodzin, P.
    Rajewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/256760.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    SLM
    synergistic effect
    Cr(III)
    D2EHPA
    Cyanex 272
    efekt synergistyczny
    Opis:
    Transport of Cr(III) ions through a mix carrier supported liquid membrane (SLM) was studied. A mixture of D2EHPA and Cyanex272 was used as a carrier. It was observed that the effectiveness of the process depends on the concentration ratio of carriers in the liquid phase. There is a threshold concentration of the carriers in the membrane phase, above which the efficiency was decreased. The threshold concentration of carriers mixtures for Cr(III) ions transport was obtained when 30% of D2EHPA was added to the 5% of Cyanex272. This composition allows one to shorten the time from 5 to 1.5 hours and to remove ~98% of Cr(III). The value of flux increased 3-fold and the effectiveness also increased.
    Przeprowadzono badania transportu jonów Cr(III) przez dwuprzenośnikową immobilizowaną membranę ciekłą. Do transportu jonów Cr(III) zastosowano mieszaninę przenośników Cyanex272 i D2EHPA. Stwierdzono, że efektywność procesu zależy od stosunku stężeń przenośników w fazie membranowej. Zaobserwowano wzrost efektywności przenoszenia jonów Cr(III), jednak do pewnego progowego stężenia drugiego przenośnika w membranie, po przekroczeniu którego wydajność spadała. W układzie z Cyanex272 i D2EHPA dla transportu Cr(III) przez SLM ich progowe stężenia to odpowiednio 5% i 30%. Membrana o takim składzie umożliwia trzykrotne zwiększenie strumienia, a tym samym zwiększa się efektywność procesu. Czas trwania procesu został skrócony z 5 h (dla samego D2EHPA) do 1,5 h, co umożliwiło usunięcie ~98% chromu z roztworu.
    Źródło:
    Problemy Eksploatacji; 2013, 3; 37-44
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura przenośnika jako czynnik determinujący mechanizm transportu chromu(III) w membranie ciekłej
    Carrier structure as a determinant of chromium(III) transportation mechanism in a liquid membrane system
    Autorzy:
    Rajewski, J.
    Religa, P.
    Gierycz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2072912.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    D2EHPA
    CYANEX 272
    membrana ciekła
    powstawanie miceli
    Cyanex 272
    liquid membrane
    micellization
    Opis:
    Zbadano zjawisko powstawania wody w membranie ciekłej zawierającej D2EHPA oraz CYANEX272 w roli przenośników jonów. W układzie zachodzi micelizacja cząsteczek D2EHPA, a w powstających agregatach tworzą się przestrzenie/kanały transportowe umożliwiające przepływ jonów Cr(III). CYANEX 272 nie tworzy tak rozbudowanych struktur. Opisany mechanizm transportu stanowić będzie podstawę teoretyczną do opracowania modelu matematycznego dla transportu jonów Cr(III) w badanym układzie z SLM.
    A phenomenon of water formation in the liquid membrane containing D2EHPA and CYANEX272 as ions carriers was investigated in the paper Micellization of the D2EHPA particles occurs in the system. Transportation spaces/channels are formed inside created aggregates allowing the flow c Cr(III) ions. CYANEX 272 does not create such large structures. This transportation mechanism should provide a theoretical basis for the mathematical model of Cr (III) transportation in the system studied.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2014, 4; 286--287
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation of cobalt from nickel using novel ultrasound-prepared supported liquid membranes containing Cyanex 272 as carrier
    Autorzy:
    Leon, G.
    Martinez, G.
    Leon, L.
    Guzman, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/109879.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    cobalt
    nickel
    separation
    supported liquid membranes
    ultrasound
    facilitated counter-transport
    Cyanex 272
    Opis:
    The demand for cobalt has increased significantly in recent years due to its use in a wide variety of products and processes. Cobalt and nickel often accompany each other in nature and close physicochemical properties of both metals make their separation a complicated practical problem. Organophosphorous extractants have been widely used to separate cobalt from nickel. This paper presents the preliminary results obtained for separation of cobalt from nickel using Cyanex 272 containing supported liquid membranes prepared by a novel ultrasound-assisted method. The results show that this novel supported liquid membrane preparation method leads to higher separation factors than those described in the literature under similar separation conditions.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 1; 77-86
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synergistic solvent extraction of Co(II) and Li(I) from aqueous chloride solutions with mixture of Cyanex 272 and TBP
    Autorzy:
    Pospiech, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/110291.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    cobalt(II)
    lithium(I)
    Cyanex 272
    TBP
    synergistic extraction
    Opis:
    In this work, separation of cobalt(II) over lithium(I) ions from aqueous chloride solutions by synergistic solvent extraction (SX) has been studied. A synergistic mixture of commercial extractants such as bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272) and tributyl phosphate (TBP) in kerosene was used as a selective extractant. The investigations were first performed to select optimal conditions for the effective separation including pH of the aqueous phase as well as concentration of synergistic mixture. High selective solvent extraction of cobalt(II) over lithium(I) from chloride solution has been achieved by the mixture of 0.1 M Cyanex 272 and 0.05 M TBP in kerosene while efficient Co(II) stripping has been performed by 0.5 M sulphuric acid.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 1; 353-364
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Hollow Fiber Supported Liquid Membrane for Extraction of Cobalt by Cyanex 272
    Autorzy:
    Swain, Basudev
    Lee, Jae-Chun
    Kim, Dae-Guen
    Lee, Chan Gi
    Powiązania:
    https://bibliotekanauki.pl/articles/354650.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cyanex 272
    hollow fiber supported
    cobalt recovery
    Opis:
    Considering the advantages of hollow fiber supported liquid membrane (HFSLM), it has been applied for extraction of Co(II) with a motivation to extract cobalt from various waste resources. Extraction efficiency and transport behavior of Co(II) through HFSLM containing Cyanex 272 diluted in kerosene were investigated. Experiments were performed as a function of aqueous feed solution velocity (1000 mL/min) for both feed and strip, pH of feed solution in the range of 4.00-6.75, the carrier concentration of 25-1000 mol/m3, and acid concentration in strip solution of 1-500 mol/m3 on. The mass transfer rate or flux J Co(II), which is a function of metal concentration, volume of solution, and membrane area were analyzed. The optimum condition for extraction of Co(II) was pH of 6.00, Cyanex 272 concentration of 500 mol/m3 and H2 SO4 concentration of 100 mol/m3.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 845-850
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation of rare earth elements from the leaching solution of waste phosphors by solvent extraction with Cyanex 272 and its mixture with Alamine 336
    Autorzy:
    Xing, Weidong
    Lee, Man Seung
    Powiązania:
    https://bibliotekanauki.pl/articles/1449503.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phosphors
    rare earth elements
    HCl solution
    solvent extraction
    Cyanex 272
    Opis:
    Waste phosphors contain rare earth elements (REEs) such as yttrium (Y), europium (Eu), cerium (Ce), terbium (Tb) and lanthanum (La). Separation of these REEs from the leaching solution of waste phosphors was investigated by solvent extraction with single Cyanex 272, binary mixture (mixture of Cyanex 272 and Alamine 336), ionic liquid (prepared by Cyanex 272 and Aliquat 336) in kerosene. The effect of solution pH and extractants concentration was mainly investigated. The results indicated that Y(III) was selectively extracted by single Cyanex 272 over the other four REEs from the HCl solution with initial pH range from 3 to 5. Synergistic extraction with the binary mixture was enough for the extraction of Y(III), Tb(III) and Eu(III) with a small amount of Ce(III). Scrubbing with pure Y(III) solution with intermediate acidity was effective in scrubbing Ce(III) from the loaded binary mixture organic phase. Stripping behavior of the Y(III), Tb(III) and Eu(III) by HCl solution was similar to each other. Tb(III) and Eu(III) can be separated by extraction with the binary mixture followed by scrubbing with pure Tb(III) solution. McCabe-Thiele diagrams were constructed for the extraction of Y(III) by single Cyanex 272 and that of Tb(III) by the mixture. A process was proposed for the separation of REEs from the leaching solution of waste phosphors by solvent extraction.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 1; 184-194
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applicability Study of Co and Eu Extraction Using Solvent from Ca Rich HCl Solution
    Autorzy:
    Oh, Maengkyo
    Lee, Keunyoung
    Foster, Richard I.
    Kim, Ik-Soo
    Lee, Chang-Ha
    Powiązania:
    https://bibliotekanauki.pl/articles/2203724.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    solvent extraction
    radioactive wastewater
    waste valorization
    Cyanex 272
    Cyanex 301
    Opis:
    This study was conducted to treat radioactive acidic wastewater, which contained radioactive 60Co and 152Eu. The wastewater can be generated during a decommissioning project to reduce the volume of radioactive concrete waste from nuclear facilities. With a variety of methods for separating the radioactive nuclides available, we evaluated the separation applicability of the solvent extraction method. From our results, Co and Eu could be easily extracted from the Ca rich wastewater using Cyanex301 (Co extraction (%) 99.8, Eu extraction (%) 99.6) without Ca extraction. On the other hand, Eu could be selectively separated by Cyanex272 (Eu extraction (%) 99.1) without Co and Ca extraction at pH 2~3. Therefore, the extraction method can be tailored according to the target radionuclides present in the wastewater and be selectively applied to the overall treatment process. By extracting radioactive Co and Eu from acidic wastewater to below the discharge criteria, treated wastewater could be regarded as non-radioactive industrial waste, to be economically and easily handled. Moreover, it may be possible to reuse separated Co and Eu for research and industrial applications by realizing waste valorization.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 123--126
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation and purification of light rare earth elements from chloride media using P204 and Cyanex272 in sulfonated kerosene under non-saponification conditions
    Autorzy:
    Fan, Peiqiang
    Zhang, Wenjie
    Tong, Xiong
    Xie, Xian
    Xie, Ruiqi
    Song, Qiang
    Du, Yunpeng
    Cao, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/27323661.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    P 204
    Cyanex 272
    light rare earths
    extraction
    mechanism
    Opis:
    The extraction of light rare earths (Pr and Nd) from chloride medium was investigated using a mixture of di(2-ethylhexyl) phosphoric acid (P204) and bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex272) in sulfonated kerosene. The P204+Cyanex272 system exerted a synergistic effect on the separation of light rare earths, and the separation coefficient was higher than when P204 and Cyanex272 were used as extractants alone. The separation coefficient of Pr and Nd in the extraction system reached 1.75 when the pH of the aqueous phase material solution was approximately 2.5, and 1.5 mol/L hydrochloric acid as a stripping agent effectively eluted the rare earth ions in the loaded organic phase. Combining the slope method, infrared spectroscopy, and nuclear magnetic resonance spectroscopy, we explored the mechanism of the extracted Nd and Pr into the organic phase complex, and finally entered the organic phase with Re(HA2)2B. The P-O-H bond and P=O bond in the extractant P204 and Cyanex272 formed a coordination bond with Re3+. Therefore, this extraction method also provides a reference for a more environmentally friendly and efficient procedure for separation and purification of light rare earth elements Pr and Nd.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 172444
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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