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 "sulfonic acid" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-10 z 10
    Tytuł:
    Esterification of fatty acids with C8-C9 alcohols over selected sulfonic heterogeneous catalysts
    Autorzy:
    Nowicki, J.
    Mosio-Mosiewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/779516.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    esterification of fatty acids
    C8-C9 alcohols
    sulfonic acid catalysts
    Opis:
    A study on the synthesis of esters of fatty acids of natural origin (oleic acid from rapeseed oil) and branched synthetic isostearic acid with commercially available alcohols C8-C9 i.e. 2-ethylhexanol (2-EH) and 3,5,5-trimethylhexanol (TMH) in the presence of selected heterogeneous catalysts containing active sulfonic groups has been made. The catalysts were obtained using ready available amorphous silicas with different textural characteristics. The influence of catalyst porosity on the catalytic properties in the esterification of fatty acids has been investigated. The effect of the synthesis temperature has also been studied. The results were compared with the results of esterification with the use of acidic ion exchange resins. It was shown that catalysts obtained on the basis of amorphous silicas are good and reusable catalysts for the esterification of fatty acids with higher alcohols.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 3; 42-47
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetics of acetic acid – methanol esterification reaction over sulfonic acid-functionalized mcf catalyst
    Kinetyka reakcji estryfikacji kwasu octowego metanolemwobecności katalizatora mcf funkcjonalizowanego grupami kwasowymi
    Autorzy:
    Maresz, K.
    Malinowski, J. J.
    Odrozek, K.
    Koreniuk, A.
    Mrowiec-Białoń, J.
    Jarzębski, A. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/306151.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Inżynierii Chemicznej PAN
    Tematy:
    analiza kinetyczna
    estryfikacja
    moduł Thielego
    Opis:
    The esterification of acetic acid with methanol was studied in the presence of heterogeneous acidic catalyst - sulfonic acid functionalized silica mesoporous cellular foam (MCF) in order to determine its potentials. The effects of catalyst loading, molar ratio of substrates and temperature on the reaction rate were discussed. The kinetic model for this reaction was proposed.
    Przedstawiono wyniki badań kinetycznych reakcji estryfikacji kwasu octowego metanolem w obecności stałego kwasowego katalizatora – mezoporowatowego materiału krzemionkowego o strukturze piankowej, funkcjonalizowanego grupami sulfonowymi. Określono wpływ ilości katalizatora, stosunku molowego substratów oraz temperatury na szybkość reakcji. Zaproponowano model kinetyczny reakcji przeprowadzonej w obecności otrzymanego katalizatora.
    Źródło:
    Prace Naukowe Instytutu Inżynierii Chemicznej Polskiej Akademii Nauk; 2013, 17; 35-46
    1509-0760
    Pojawia się w:
    Prace Naukowe Instytutu Inżynierii Chemicznej Polskiej Akademii Nauk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natural gas hydrate promotion capabilities of toluene sulfonic acid isomers
    Autorzy:
    Jarrahian, A.
    Heidaryan, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/779767.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    natural gas hydrate
    hydrotrope
    toluene sulfonic acid
    Opis:
    The purpose of this study was to investigate the natural gas hydrate promotion capabilities of the hydrotrope Toluene Sulfonic Acid (TSA) isomers as an additive. The capabilities of TSA isomers were measured with different concentrations. The optimum additive concentration for hydrate formation was determined for the given pressure, temperature, mixing condition, and cooling time. The natural gas hydrate promotability of para-TSA was found to be 20% and 35% more than meta-TSA and ortho-TSA respectively at the optimum concentration. Beyond the optimum TSA concentration, the hydrate formation declined as the ice formation reduced the overall gas-to-water volume ratio in the hydrates.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 1; 97-102
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of various agents on stability of 2-phenylbenzimidazole-5-sulfonic acid
    Autorzy:
    Studziński, W.
    Karczmarek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/105632.pdf
    Data publikacji:
    2017
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    PBSA
    UV filters
    emerging pollutants
    photodegradation
    oxidation
    filtr UV
    zanieczyszczenia
    fotodegradacja
    utlenianie
    Opis:
    The subject of this study is 2-phenylbenzimidazole-5-sulfonic acid (PBSA), which is one of 26 filters used for personal protection in the European Union. The aim of the study was to investigate the stability of 2- phenylbenzimidazole-5-sulfonic acid and its sodium salt under the influence of various agents. The study has shown that UV radiation, pH value, hydrogen peroxide are important factors limiting the stability of PBSA. The significance of the study is expanding the knowledge about the stability of PBSA.
    Źródło:
    Acta Innovations; 2017, 25; 5-12
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Poly(2-acrylamido-2-methyl-1-propane sulfonic acid-co-1-vinyl-2-pyrrolidone) Hydrogel and its use in the Removal of Cd(II), Pb(II) and Cu(II)
    Autorzy:
    Çavuş, S.
    Çakal, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031592.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    sorption
    heavy metal ions
    hydrogels
    sulfonic acid
    Opis:
    Poly(2-acrylamido-2-methyl-1-propanesulfonic acid-co-1-vinyl-2-pyrrolidone), P(AMPS-co-VP), hydrogel was prepared by free radical cross-linking polymerization method. Prepared hydrogel was used in the competitive removal of Cd(II), Pb(II) and Cu(II) ions from aqueous solution. The characterization of P(AMPS-co-VP) before and after sorption was carried out by the Fourier transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. Atomic absorption spectrometer was used to found the concentration of metal ions in the aqueous solution. The selectivity of P(AMPS-co-VP) was as follows: Cd(II)>Pb(II)>Cu(II). Kinetic study showed that competitive removal of heavy metal ions on poly(AMPS-co-VP) was in accordance with a pseudo-second-order model.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 505-508
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polymeric anticoagulants based on poly(2-(acryl-amido)-2-methylpropane-sulfonic acid) block polymers
    Autorzy:
    Szczubiałka, K.
    Kałaska, B.
    Kamiński, K.
    Mikłosz, J.
    Yusa, S.
    Sokołowska, E.
    Błażejczyk, A.
    Wietrzyk, J.
    Pawlak, D.
    Nowakowska, M.
    Mogielnicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/284416.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    polymers
    anticoagulants
    PEG-PAMPS
    Źródło:
    Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 73
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proton conductivity and free volume properties in per-fluorinated sulfonic acid/PTFE copolymer for fuel cell
    Autorzy:
    Mohamed, H.
    Abdel-Hady, E.
    Abdel-Hamed, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1057956.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Bj
    82.47.Nj
    72.80.Le
    36.10.Dr
    88.30.J-
    88.30.pf
    Opis:
    The proton conductivity mechanism in per-fluorinated sulfonic acid/PTFE copolymer Fumapem® membranes for polymer electrolyte membranes has been investigated. Three samples of Fumapem® F-950, F-1050 and F-14100 membranes with different ion exchange capacity 1.05, 0.95, and 0.71 meq/g, respectively, were used in this study after drying. The o-Ps hole volume size (V_{FV,Ps}) was quantified using the positron annihilation lifetime technique while the proton conductivities (σ ) were measured using LCR Bridge as function of temperature. It was found that as the ion exchange capacity increases, the proton conductivity increases and the free volume expands. Temperature dependences of proton conductivity and the o-Ps hole volume size (V_{FV,Ps}) reflect the glass transition temperature of the membrane. A good linear correlation between the reciprocal of the o-Ps hole volume size (1/V_{FV,Ps}) and log(σ)+Δ E_a/2.303k_{B}T, (where ΔE_a is the activation energy, T is the absolute temperature and k_{B} is the Boltzmann constant) at different temperatures indicate that the ionic motion in dry Fumapem® is governed by the free volume. A linear relationship between the critical hole size γ V*_{i} and the ion exchange capacity was also achieved.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1509-1514
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of 2-phenylbenzimidazole-5-sulfonic acid using heterogeneous photocatalysis
    Autorzy:
    Studziński, W.
    Gackowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/105762.pdf
    Data publikacji:
    2018
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    PBSA
    UV filters
    emerging pollutants
    photodegradation
    titanium dioxide
    filtr UV
    zanieczyszczenia
    fotodegradacja
    tlenek tytanu(IV)
    Opis:
    UV filters are classified as environmental pollutants (emerging pollutants). One of the most frequently detected UV filters in real samples is 2-phenylbenzimidazole-5-sulfonic acid (PBSA). It has been shown that conventional technologies applied in sewage treatment plants are not adapted for complete removal of sunscreen agents. Therefore, there is a trend to undertake activities leading to improvement of water quality by enhancing treatment methods. This is important due to the fact that in an aqueous environment, in the presence of UV radiation or sunlight irradation, PBSA generates reactive oxygen species that can damage the DNA of living organisms. The aim of study was to investigate an effect of pH and TiO2 on PBSA stability in the presence of UV radiation. It was found that the rate of PBSA degradation depends on the catalyst dose and pH of solution. The photocatalysis reaction was carried out in a Heraeus laboratory exposure set equipped with a 150 W medium pressure mercury lamp. The course of PBSA degradation process as a function of time was monitored using UV/VIS spectrophotometer and liquid chromatograph equipped with UV-Vis detector.
    Źródło:
    Acta Innovations; 2018, 28; 5-13
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cu(II), Co(II), Ni(II), Mn(II) and Zn(II) Schiff base complexes of 3-hydroxy-4-[N-(2-hydroxynaphthylidene)-amino]-naphthalene-1-sulfonic acid: Synthesis, Spectroscopic, thermal, and antimicrobial studies
    Autorzy:
    Bakare, Safyah B.
    Powiązania:
    https://bibliotekanauki.pl/articles/778830.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Schiff base
    hydroxynaphthalene-1-sulfonic acid
    hydroxy-1-naphthaldehyde
    transition metal ions
    morphology
    antimicrobial activity
    Opis:
    Five divalent transition metals Cu(II), Co(II), Ni(II), Mn(II) and Zn(II) complexes have been synthesized using 3-hydroxy-4-[N-(2-hydroxynaphthylidene)-amino]-naphthalene-1-sulfonic acid (H3L) Schiff base as a ligand derived from the condensation reaction between 4-amino-3-hydroxynaphthalene-1-sulfonic acid and 2-hydroxy-1-naphthalde-hyde. The synthesized complexes were characterized using microanalytical, conductivity, FTIR, electronic, magnetic, ESR, thermal, and SEM studies. The microanalytical values revealed that the metal-to-ligand stoichiometry is 1:1 with molecular formula [M2+(NaL)(H2O)x].nH2O (where x = 3 for all metal ions except of Zn(II) equal x = 1; n = 4, 10, 7, 4, and 6 for Cu(II), Co(II), Ni(II), Mn(II) and Zn(II), respectively). The molar conductivity result indicates that all these complexes are neutral in nature with non-electrolytic behavior. Dependently on the magnetic, electronic, and ESR spectral data, octahedral geometry is proposed for all the complexes except to zinc(II) complex is tetrahedral. Thermal assignments of the synthesized complexes indicates the coordinated and lattice water molecules are present in the complexes. SEM micrographs of the synthesized complexes have a different surface morphologies. The antimicrobial activity data show that metal complexes are more potent than the parent ligand.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 3; 26-34
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dissolution kinetics of hemimorphite in methane sulfonic acid
    Autorzy:
    Zhang, Qian
    Wen, Shuming
    Feng, Qicheng
    Nie, Wenlin
    Wu, Dandan
    Powiązania:
    https://bibliotekanauki.pl/articles/110482.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hemimorphite
    methane sulfonic acid
    dissolution
    kinetics
    Opis:
    Hemimorphite has a large content of zinc, but its recovery using flotation alone is low. Nowadays, hydrometallurgical and pyrometallurgical methods are used to treat zinc ores. In this work, the leaching and dissolution kinetics of hemimorphite by using methane sulfonic acid (MSA) as an alternative leaching reagent was investigated. The effects of several experimental parameters including reaction temperature, MSA concentration, particle size, and stirring speed were also analyzed. Results showed that zinc leaching increased with increased reaction temperature, MSA concentration, and stirring speed, as well as decreased particle size. The mechanism of hemimorphite dissolution in MSA solutions may be a new variant of the shrinking-core model. Based on experimental data and kinetics, the apparent activation energy was determined to be 49.50 kJ/mol. The rate of reaction equation was also obtained to describe the process and found that the MSA concentration largely influenced the leaching of hemimorphite.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 1; 1-9
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

      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