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    Wyświetlanie 1-5 z 5
    Tytuł:
    Synthesis and characteristics of titanium silicalite TS-1, Ti-Beta and Ti-MWW catalysts
    Autorzy:
    Wróblewska, A.
    Fajdek, A.
    Milchert, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/779396.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    TS-1
    Ti-Beta
    Ti-MWW
    titanium-silicalite catalysts
    Opis:
    The synthesis methods of the following titanium-silicalite catalysts: TS-1, Ti-Beta and Ti-MWW were presented. The results of the analyses of the catalysts by XRD, SEM and IR, UV-vis methods were also shown. A brief description of the catalytic performances of these catalysts in the oxidation process of olefins, alkenes, alcohols and aromatic compounds was presented.
    Źródło:
    Polish Journal of Chemical Technology; 2009, 11, 1; 64-71
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The pressure method of 1-butene-3-ol epoxidation over Ti-beta catalyst
    Autorzy:
    Wróblewska, A.
    Wajzberg, J.
    Milchert, E.
    Grzmil, B.
    Ziebro, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/779807.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    epoksydacja w fazie ciekłej
    1,2-epoksy-3-butanol
    katalizator Ti-Beta
    liquid phase epoxidation
    1,2-epoxy-3-butanol
    Ti-Beta catalyst
    Opis:
    The investigations of 1-buten-3-ol (1B3O) epoxidation by 30% hydrogen peroxide over Ti-Beta catalyst were performed. The experiments were carried out under the autogenic pressure and at the presence of methanol as a solvent. The influence of the following technological parameters on the course of epoxidation: temperature (20 - 120°C), the molar ratio of 1B3O/H2O2 (0.5:1 - 5:1), methanol concentration (5 - 90 wt%.), Ti-Beta concentration (0.1 - 5.0 wt%) and the reaction time (0.5 - 5.0 h) was investigated. The main functions describing the process were: the selectivity of transformation to 1,2-epoxy-3-butanol in relation to 1B3O consumed, conversions of substrates as well as the selectivity of transformation to organic compounds in relation hydrogen peroxide consumed.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 2; 53-56
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Epoxidation of 1-buten-3-ol under atmospheric pressure over the Ti-Beta catalyst
    Autorzy:
    Wróblewska, A.
    Wajzberg, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/779898.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    epoksydacja w fazie ciekłej
    1,2-epoksy-3-butanol
    katalizator Ti-Beta
    liquid phase epoxidation
    1,2-epoxy-3-butanol
    Ti-Beta catalyst
    Opis:
    The results of 1-buten-3-ol (1B3O) epoxidation with 30% hydrogen peroxide over the Ti-Beta catalyst were presented. The studies were performed under the atmospheric pressure and at the presence of methanol as a solvent. There was examined the influence of the following parameters: the temperature (0 - 60°C), the molar ratio of 1B3O/H2O2 (1:1 - 5:1), methanol concentration (5 - 90 wt%), the Ti-Beta catalyst concentration (0.1 - 5.0 wt%) and the reaction time (0.5 - 5.0 h). The optimal parameters were determined by using the following functions: the selectivity of the transformation to 1,2-epoxy-3-butanol (1,2E3B) in relation to 1B3O consumed, the selectivity of the transformation to organic compounds in relation to hydrogen peroxide consumed, the conversions of 1B3O and hydrogen peroxide. The main product of epoxidation was 1,2-epoxy-3-butanol, epoxide having several applications.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 2; 110-113
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Properties and Corrosion Behaviors of Aged Ti-4Mo-4Cr-X (X = Sn, V, Zr) Alloys for Metallic Biomaterials
    Autorzy:
    Lee, Kwangmin
    Lee, Gunhee
    Powiązania:
    https://bibliotekanauki.pl/articles/355252.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    beta Ti-alloy
    metallic biomaterials
    aging
    potentiodynamic polarization
    Opis:
    The purpose of this study was to investigate the mechanical properties of beta type aged Ti-4Mo-4Cr-X (X = V, Sn, Zr) quaternary alloy for use as a cardiovascular stent. Titanium (Ti) alloys were fabricated using a vacuum arc remelting furnace process. To homogenize the specimens of each composition and remove the micro segregation, all cast specimens were subjected to homogenization at 850°C for 4 h, which was 100°C higher than the β-transus temperature of 750°C. The tensile strength and elongation of the aged Ti-4Mo-4Cr-X (X = V, Sn, Zr) alloys were increased as compared to the homogenized alloys. In addition, many α/β interface boundaries formed after aging treatment at 450°C, which acted as inhibitors of strain and caused an increase in tensile strength. The elongation of Ti-4Mo-4Cr-X alloys consisting of α + β phases after aging treatment was improved by greater than 30%. Results of a potentiodynamic polarization test showed that the lowest current density of Ti-4Mo-4Cr-4Sn with1.05 × 10-8 A/cm2 was obtained. The present Ti-4Mo-4Cr-X alloys showed better corrosion characteristics as compared to the 316L stainless steel and L605 (Co-Cr alloy) cardiovascular stent alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 4; 1297-1301
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The new method of 1,2-epoxy-3-butanol production over titanium silicalite catalysts
    Autorzy:
    Wajzberg, J.
    Wróblewska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/779811.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    1,2-epoksy-3-butanol
    epoksydacja w fazie ciekłej
    TS-1
    Ti-Beta
    Ti-MCM-41
    1,2-epoxy-3-butanol
    liquid phase epoxidation
    Opis:
    The results of 1-butene-3-ol (1B3O) epoxidation over the titanium silicalite catalysts: TS-1, Ti-Beta, Ti-MCM-41 has been presented. The optimal parameters obtained for the individual catalyst were compared. The main functions describing the process were: the selectivity of transformation to 1,2-epoxy-3-butanol (1,2E3B) in relation to 1B3O consumed, the conversions of 1B3O and hydrogen peroxide and the selectivity of the transformation to organic compounds in relation to the H2O2 consumed. The main product of the epoxidation process was 1,2-epoksy-3-butanol, the chemical compounds having a lot of applications.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 2; 49-52
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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