Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "extractant" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-11 z 11
    Tytuł:
    Preparation of thioester type of broom extractant with silver selectivity
    Autorzy:
    Furugou, H.
    Ohto, K.
    Kawakita, H.
    Harada, H.
    Inoue, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/346979.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    broom type extractant
    tripodal compound
    silver ion
    extraction
    ion selectivity
    Opis:
    A novel tripodal thioester type of broom extractant has been synthesized to investigate selectivity for soft metal ions. Broom extractant exhibited high extractability for silver ion compared with monopodal compound. The complexation ratio of the broom extractant and silver ion was found to be 1:1 from the result of extractant concentration dependency. For stripping of loaded silver ion, complete stripping was achieved with both 1 mol dm-3 thiourea and high concentration of acidic solutions. As an application, electrode response of silver ion was observed at concentration range of 10-3 to 10-6 M silver nitrate using broom extractant as an ionophore.
    Źródło:
    Ars Separatoria Acta; 2007, 5; 68-75
    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
    Tytuł:
    Hafnium Oxide as Efficient Material for a New Generation Dielectric
    Autorzy:
    Mukhachov, A.
    Kharitonova, O.
    Terentieva, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1029657.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Hafnium oxide
    extraction
    phase
    dielectric
    centrifugal extractors
    extractant
    Opis:
    In the early 2000-ies, world leaders in the field of computer engineering, such companies as IBM, Intel and Samsung Electronics announced the development of a new technology for the production of boards based on multilayer films HfO₂-Al₂O₃ on a silicon pad using the method of atomic layer deposition. The board has a high dielectric constant value thus making it possible to produce smaller transistors with increased operational speed, to reduce leakage current and electric energy consumption. It has been known that hafnium oxide is used in the production of optical devices, resistors, electronic ceramics, neutron absorption compositions, and catalysts. High purity of material is one of key conditions for its application. As source material, hafnium concentrate was used that was enriched to 10% in the form of K₂(ZrHf)F₆ salt - the product of fractional crystallization of zirconium and hafnium fluorides in the production of zirconium for nuclear applications. Another source material is a HFO₂ commercial-grade hafnium oxide produced at Vilnogorsk Mining and Smelting Works. Key process stages are fusion with alkali at a temperature of 800°C, dissolution in nitric acid and extraction. The impurities content of resultant hafnium re-extract is 10-5% (mass). The prime objective of the process technology is the preservation of hafnium purity in its oxide production, which is attained by the application of materials and equipment items having a high corrosion resistance, such as stainless steel, crucibles made of high-purity silicon, reaction vessels made of zirconium and fluoroplastic. Centrifugal extractors allow the key critical process of hafnium extraction purification to be sufficiently effective, resulting in obtaining the product of a required 99.99% purity. Physical properties of hafnium oxide are presented in sufficient detail in. Hafnium oxide can by produced using various methods to be selected based on the requirements to product quality, process efficiency and cost considerations.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 778-780
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neodecanoic acid as extractant of selected non-ferrous metals
    Autorzy:
    Gotfryd, L.
    Pietek, G.
    Szołomicki, Z.
    Becker, K.
    Piwowońska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/109507.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Versatic 10
    neodecanoic acid
    solvent extraction
    non-ferrous metals
    hydrometallurgy
    Opis:
    The paper presents results of studies on extracting properties of neodecanoic acid (Versatic 10) solutions. Neodecanoic acid was diluted in Exxsol D80 AZ to three concentrations: 7.5, 15, and 30 % (v/v). Tests were conducted using sulphate(VI) solutions of six ions: Zn(II), Ni(II), Cu(II), Co(II), Cd(II), Mn(II) and a nitrate(V) solution of Pb(II). All the aqueous solutions were prepared as 0.1 M concentration. For all combinations of the used solutions (organic and aqueous), direct methods of measuring and recording the pH of the biphasic mixture have been applied. The degrees of ions extraction, depending on equilibrium pH were also presented in the paper. Extraction and stripping isotherms of selected ions and organic phase were plotted for 7.5 and 30 % (v/v) of extractant solutions and Zn(II), Ni(II) and Cu(II) ions.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2015, 51, 2; 435-445
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some factors affecting clay dispersion and aggregate stability in selected soils of Nigeria
    Autorzy:
    Mbagwu, J.S.C.
    Schwertmann, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/25842.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil aggregation
    organic matter
    aggregated clay
    soil
    chemical extractant
    clay dispersion
    aggregate stability
    Nigeria
    Źródło:
    International Agrophysics; 2006, 20, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of plant material freezing and extractant acidifying on the antioxidant potential and pigments content in extracts and raw materials of different carrot varieties
    Autorzy:
    Muzykiewicz-Szymańska, A.
    Zielonka-Brzezicka, J.
    Klimowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/13076803.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2021, 20, 2; 33-42
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using soil phosphorus sorption saturation with Mehlich 3 extractant as a predictor for estimating risk of phosphorus losses by leaching from arable land
    Autorzy:
    Jurga, Beata
    Lipiński, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/2148252.pdf
    Data publikacji:
    2021-12-30
    Wydawca:
    Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
    Tematy:
    soil phosphorus sorption saturation
    phosphorus losses
    soil phosphorus
    Mehlich 3
    drainage water
    Opis:
    Phosphorus (P) is essential for plant growth and yield. Balanced fertilization can produce a yield-sustaining effect, but excessive P applied to agricultural soils poses a risk by losing excess of phosphorus to the aquatic environment. This is undesir- able from both an economic and environmental perspective as it wastes a finite phosphorus rock and represents a serious environ- mental hazard in the form of pollution and eutrophication of the aquatic resources. For this reason, proven methods of estimating the risk of P losses from agricultural land are needed. The aim of this study was to assess the content of soil available phosphorus (SP) and soil phosphorus sorption saturation (Psat) in arable soils and assess if they can be used to predict P in waters from drain- age outlets from adjacent arable land. The determination of phos- phorus content in the soil and determination of Psat was carried out using Mehlich 3 extractant. Psat was calculated as the molar ratio of P to the extractable Fe and Al in one solution. The aver- age phosphorus content determined in the soil by the Mehlich 3 method was 101.8 mg kg-1. Psat was on average 11.8%. The aver- age content of phosphorus in water samples from drain outlets was 0.1 mgP dm -3.
    Źródło:
    Polish Journal of Agronomy; 2021, 47; 95-101
    2081-2787
    Pojawia się w:
    Polish Journal of Agronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery of major components of spent zinc electrolyte with di(2-ethylhexyl)phosphoric acid (DEHPA) used as a zinc(II) extractant
    Autorzy:
    Gotfryd, L.
    Pietek, G.
    Szołomicki, Z.
    Becker, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/951834.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    zinc electrolyte
    zinc solvent extraction
    DEHPA
    mineral fertilizer
    Opis:
    Industrial acidic zinc electrolyte has been treated with calcium compounds and/or concentrated ammonia solution and resulting crystalline phases as well as equilibrium mother liquors were analyzed in detail for dependence on preliminary dilution of electrolyte with water. Neutralized zinc electrolyte was an object of investigation in zinc(II) extraction with di(2-ethylhexyl)phosphoric acid (DEHPA) as an extractant. Dependencies of zinc(II) and contaminants extraction on equilibrium pH, isotherms of zinc(II) extraction and stripping have been studied. During simulated laboratory counter-current trial of zinc extraction a new zinc electrolyte (stripped solution) has been produced. Raffinates left after the process were purified and qualified as mineral magnesium-ammonium fertilizer solutions.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 1; 311-325
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction of nitrogen compounds from beet cossettes to raw juice in modification conditions of feed water composition
    Ekstrakcja zwiazków azotowych z krajanki buraczanej
    Autorzy:
    Wnuk, B.
    Lisik, K.
    Szwajcowska, K.
    Zaorska, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402010.pdf
    Data publikacji:
    1990
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    beet sugar technology
    modification of extractant
    nitrogen compounds in juice
    Opis:
    During beet cossettes extraction besides sucrose many other compounds, for instance nitrogen compounds, pass to the juice, too. Modified water extractants were used containing aluminium sulfate, calcium chloride and calcium hydroxide. The least amount of total nitrogen passed to the juice using calcium chloride.
    W procesie ekstrakcji, oprócz sacharozy, do soku surowego przechodzą także inne substancje. Między innymi są to związki azotowe, które niekorzystnie wpływają na przebieg dalszych procesów jednostkowych. W celu polepszenia warunków ekstrakcji dodaje się różne substancje chemiczne, które jednocześnie mogą ułatwiać wyżymanie wysłodków, co pośrednio wpływa na oszczędność energii podczas suszenia wysłodków. Celem pracy było zbadanie stopnia ekstrakcji związków azotowych z krajanki do soku surowego, w warunkach modelowych, z zastosowaniem wybranych substancji chemicznych. Badania prowadzono w skali laboratoryjnej. Do ekstrakcji 1 kg krajanki stosowano roztwory modelowe zawierające różne ilości odczynników: siarczan glinowy 21 do 86 mg Al, chlorek wapniowy 140 do 880 mg Ca oraz wodorotlenek wapniowy 357 do 1.428 mg Ca. W krajance buraczanej, a następnie w soku surowym oraz w wysłodkach oznaczano azot ex-aminokwasowy metodą Kubadinowa i Wieningera oraz ogólną zawartość azotu metodą mineralizacji Kjeldahla. Obliczono stopień ekstrakcji związków azotowych z krajanki do soku surowego i pozostałość tych związków w wysłodkach. Stwierdzono, że najmniej związków azotowych (ogólna zawartość azotu) przechodziło do soku surowego w przypadku stosowania chlorku wapniowego - stopień ekstrakcji wynosił ok. 55%. W analogicznych doświadczeniach z dodatkiem siarczanu glinowego stopień ekstrakcji związków azotowych wynosił ponad 60% a w przypadku wodorotlenku wapniowego blisko 80%. Nie stwierdzono wpływu zmiany wielkości dawki użytej substancji chemicznej na stopień przechodzenia związków azotowych z krajanki do soku surowego.
    Źródło:
    Acta Alimentaria Polonica; 1990, 16(40), 1-2; 3-15
    0137-1495
    Pojawia się w:
    Acta Alimentaria Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using an Interdigital Micromixer for Separation of In3+ from Zinc Hydrometallurgical Process with D2EHPA as an Extractant
    Autorzy:
    Li, C.
    Jiang, F.
    Ju, S.
    Peng, J.
    Wei, Y.
    Zhang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/356090.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    interdigital micromixer
    solvent extraction
    mass transfer coefficient
    indium
    stripping
    Opis:
    Experiments were performed in an interdigital micromixer with 30 microchannels (40 μm width of each channel) to separate In3+, Fe3+ and Zn2+ from sulfate solutions using Di-(2-ethylhexyl)phosphoric acid (D2EHPA) as the extractant. The effects of pH, extractant concentration and flow rate on the extraction efficiency and flow rate on mass transfer coefficient of In3+, Fe3+ and Zn2+ were investigated. At a phase flow rate of 7.0 mL/min and initial solution pH of 0.423, the extraction efficiency of In3+, Fe3+ and Zn2+ was 99.29%, 3.43% and 2.54%, respectively and mass transfer coefficient of In3+, Fe3+ and Zn2+ was 144.307 s-1,1.018 s-1 and 0.750 s-1. Then, the loaded organic phase was stripped in an interdigital micromixer. At a phase flow rate of 9.0 mL/min and HCl concentration of 160 g/L, stripping efficiency of In3+ was 98.92% and mass transfer coefficient of In3+ was 169.808 s-1, while concentration of Fe3+ and Zn2+ was lower than 0.005 g/L with good separation of In3+ from Fe3+ and Zn2+.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 873-878
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solvent extraction of Terbium(III) from chloride solution using organophosphorus extractant, its mixture and ionic liquid in the presence of organic acids
    Autorzy:
    Tran, Thanh Tuan
    Song, Si Jeong
    Oh, Chang Geun
    Lee, Man Seung
    Powiązania:
    https://bibliotekanauki.pl/articles/24085863.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    extraction
    Terbium(III)
    organic acid
    ionic liquid
    buffer effect
    Opis:
    Addition of organic acids to dilute hydrochloric acid solution can improve the extraction of rare earth elements by single cationic extractants. However, the correlation between the chemical structure of organic acids and the extraction of REEs as well as the variation in equilibrium pH has not been elucidated. In this study, we investigated the extraction of Tb(III) from dilute HCl solutions containing an organic acid like formic, lactic, fumaric, or maleic acid. As extractants, single Cyanex 272, a mixture of Cyanex 272 and Alamine 336 (Ala336-Cy272), and an ionic liquid (ALi-Cy272) synthesized by Cyanex 272 and Aliquat 336 were used. The speciation of Tb(III) in dilute HCl solutions containing organic acids was analyzed. In extraction of Tb(III), organic acids showed two roles as complexing and buffering agent, which depended on the chemical structure of the acids. There was some difference in the extraction of Tb(III) between single Cyanex 272 and ionic liquid, ALi-Cy272. During extraction with ALi-Cy272, formic and lactic acid negatively affected the extraction of Tb(III). The fact that the chemical structure of organic acids affected the extraction of Tb(III) from dilute HCl solution by the studied extractants can provide important information on the selection of suitable extraction systems.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 162714
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies