STABLE SHAPED ALUMINA AND METHOD FOR PRODUCING SAME

The present invention relates to a calcined shaped alumina and to a method of preparing a calcined shaped alumina. The method comprises that the alumina in the alumina suspension is hydrothermally aged to have a specific crystallite size. This in turn produces a highly stable alumina in the form of...

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Bibliographische Detailangaben
Hauptverfasser:	HOWE, Stefan, SIEGEL, Angela, BRASCH, Andrea, HOLZMANN, Yanick
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS INORGANIC CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention relates to a calcined shaped alumina and to a method of preparing a calcined shaped alumina. The method comprises that the alumina in the alumina suspension is hydrothermally aged to have a specific crystallite size. This in turn produces a highly stable alumina in the form of a calcined shaped alumina particularly at temperatures of 1200°C and above. La présente invention concerne une alumine formée calcinée et un procédé de préparation d'une alumine formée calcinée. Selon ce procédé, l'alumine dans la suspension d'alumine est soumise à un vieillissement hydrothermique pour avoir une taille de cristallite spécifique. Cela permet alors de produire une alumine hautement stable sous la forme d'une alumine formée calcinée, en particulier à des températures de 1200 °C et plus.