Study of ammonium, mixed ammonium–cesium and cesium salts derived from (NH4)5[PMo11VIVO40] as isobutyric acid oxidation catalysts
| Autor: | Nathalie Guillou, G. Herve, Nathalie Laronze, Catherine Marchal-Roch, A. Teze |
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| Rok vydání: | 2000 |
| Předmět: |
inorganic chemicals
chemistry.chemical_classification Aqueous solution Process Chemistry and Technology Inorganic chemistry Vanadium chemistry.chemical_element Salt (chemistry) Catalysis Isobutyric acid Ammonia chemistry.chemical_compound fluids and secretions chemistry Methacrylic acid Oxidation state Dehydrogenation Ammonium |
| Zdroj: | Applied Catalysis A: General. 199:33-44 |
| ISSN: | 0926-860X |
| DOI: | 10.1016/s0926-860x(99)00522-0 |
| Popis: | Thermal exchange of cesium for ammonium cations in (NH4)5[PMo11VIVO40] impregnated at incipient wetness by CsNO3 was performed under nitrogen. The structural modification of this salt, previously reported in the Part I of this work, limits the solid state exchange to three cesium per heteropolyanion. Mixed NH4+, Cs+ and VO2+ salts, isotype of the cubic ammonium and cesium 12-molybdophosphates, are obtained. The characterizations of these low surface area compounds show that their formula is Cs2x(NH4)6−2x(VO)[PMo11VIVO40][PMo12O40], with 0≤x≤3. These compounds are active for oxidative dehydrogenation of the isobutyric acid and selective to methacrylic acid. Characterizations of the catalysts corresponding to x |
| Databáze: | OpenAIRE |
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