Warianty tytułu
Warstwowe krzemiany sodu jako prekursory mezoporowatych krzemionek. I: Optymalizacja syntezy -Na2Si2O5 i -Na2Si2O5
Języki publikacji
Abstrakty
Optimization of the synthetic procedures described in literature aimed at preparing pure δ-Na2Si2O5 has been carried out. The results show that a substantial shortening of the calcination time of amorphous silicate precursor is required, in order to minimize the appearance of the thermodynamically stable α-Na2Si2O5. The use of commercial water glass solution rather than freshly synthesized silica/NaOH slurry is the preferred source of the starting amorphous silicate. Optimized preparative routes for synthesis of single-phase δ-Na2Si2O5 and α-Na2Si2O5 have been described.
Zweryfikowano opisaną w literaturze procedurę syntezy czystego δ -Na2Si2O5. Stwierdzono, że skrócenie czasu kalcynacji amorficznego prekursora krzemianowego z 5–6 godz. do 1 godziny zapewnia otrzymanie niemal czystego α-Na2Si2O5, przy minimalnej ilości termodynamicznie stabilnej fazy -Na2Si2O5. Preferowanym źródłem wyjściowego amorficznego krzemianu sodu jest szkło wodne w miejsce syntetyzowanego roztworu SiO2/NaOH. Użycie szkła wodnego i krótki czas kalcynacji w 700°C prowadzą do otrzymania monofazowego δ -Na2Si2O5. Czysty -Na2Si2O5 można otrzymać kalcynując amorficzny krzemian sodu w temperaturze 825°C.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
151--160
Opis fizyczny
Bibliogr. [19] poz., rys., tab., wykr.
Twórcy
autor
- Polish Academy of Sciences, Institute of Catalysis and Surface Chemistry, ul. Niezapominajek 8, 30-239 Kraków, Poland
autor
- Polish Academy of Sciences, Institute of Catalysis and Surface Chemistry, ul. Niezapominajek 8, 30-239 Kraków, Poland
autor
- Faculty of Geology, Geophysics and Environmental Protection, AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland, bahr@agh.edu.pl
autor
- Polish Academy of Sciences, Institute of Catalysis and Surface Chemistry, ul. Niezapominajek 8, 30-239 Kraków, Poland
Bibliografia
- BAUER H., SCHIMMEL G., JURGES P., 1999: The evolution of detergent builders from phosphates to zeolites to silicates. Tenside Surfactants Detergents 36, 225–229.
- BENEKE K., LAGALY G., 1977: Kanemite – innercrystalline reactivity and relations to other sodium silicates. American Mineralogist 62, 763–771.
- FALAMAKI C., 2003: Crystallization of -Na2Si2O5-rich layered silicates from sodium silicate solutions: seeding and temperature programmed -phase embryo creation. Journal of the European Ceramic Society 23, 697–705.
- INAGAKI S., FUKUSHIMA Y., KURODA K., 1993: Synthesis of highly ordered mesoporous materials from a layered polysilicate. Journal of the Chemical Society, Chemical Communications 680–682.
- INAGAKI S., KOIWAI A., SUZUKI N., FUKUSHIMA Y., KURODA K., 1996: Syntheses of highly ordered mesoporous materials, FSM-16, derived from kanemite. Bulletin of the Chemical Society of Japan 69, 1449–1457.
- KATO M., SHIGENO T., KIMURA T., KURODA K., 2004: Influence of the kind of layered disodium disilicates on the formation of silica-organic mesostructured materials. Chemistry of Materials 16, 3224–3230.
- KATO M., SHIGENO T., KIMURA T., KURODA K., 2005: Synthesis of thermally stable and 2-D hexagonal super-microporous silica from hydrated -sodium disilicate. Chemistry of Materials 17, 6416–6421.
- KIMURA T., ITOH D., OKAZAKI N., KANEDA M., SAKAMOTO Y., TERASAKI O., SUGAHARA Y., KURODAK., 2000a: Lamellar hexadecyltrimethylammoniumsilicates derived from kanemite. Langmuir 16, 7624–7628.
- KIMURA T., KAMATA T., FUZIWARA M., TAKANO Y., KANEDA M., SAKAMOTO Y., TERASAKI O., SUGAHARA Y., KURODA K., 2000b: Formation of novel ordered mesoporous silicas with square channels and their direct observation by transmission electron microscopy. Angewandte Chemie International Edition in English 39, 3855–3859.
- KIMURA T., ITOH D., SHIGENO T., KURODA K., 2002: Transformation of layered docosyltrimethyl- and docosyltriethylammonium silicates derived from kanemite into precursors for ordered mesoporous silicas. Langmuir 18, 9574–9577.
- KIMURA T., ITOH D., SHIGENO T., KURODA K., 2004: Silica-based mesostructured materials induced by surfactant assemblies in the two-dimensionally limited space of a layered polysilicate kanemite. Bulletin of the Chemical Society of Japan 77, 585–590.
- KURODA K., 2004: Discovery of mesoporous silica from layered silicates. Studies in Surface Science and Catalysis 148, 73–108.
- LUCAS DE A., RODRIGUEZ L., SANCHEZ P., LOBATO J., 2000: Synthesis of crystalline layered sodium silicate from amorphous silicate for use in detergents. Industrial and Engineering Chemistry Research 39, 1249–1255.
- LUCAS DE A., RODRIGUEZ L., LOBATO J., SANCHEZ P., 2002: Synthesis of crystalline -Na2Si2O5 from sodium silicate solution for use as a builder in detergents. Chemical Engineering Science 57, 479–486.
- RIECK H.-P., 1986: Process for preparation of crystalline sodium silicates. US Patent 4,585,642.
- RIECK H.-P., 1989: Washing and cleaning agent containing surfactants, builder and crystalline layered sodium silicate. US Patent 4,820,439.
- TAMURA H., MOCHIZUKI D., KIMURA T., KURODA K. 2007: Formation of mesoporous silica from a layered polysilicate makatite. Chemistry Letters 36, 444.
- WIEKER W., HEIDEMANN D., EBERT R., TAPPER A., 1995: Zur Chemie des Kanemits (NaHSi2O5_3H2O). Zeitschrift für Anorganische und Allgemeine Chemie 621, 1779–1784.
- YANIGASAWA T., SHIMIZU T., KURODA K., KATO C., 1990: Trimethylsilyl derivatives of alkyltrimethylammonium-kanemite complexes and their conversion to microporous SiO2 materials. Bulletin of the Chemical Society of Japan 63, 1535–1537.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-6b640a78-7b7b-40e6-8768-3090cfcd06ec
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