Method for preparing alumina, least in part as extra fine...

C - Chemistry – Metallurgy – 01 – F

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C01F 7/02 (2006.01) C01F 7/44 (2006.01) C09C 1/40 (2006.01)

Patent

CA 1153187

PRECIS DE LA DIVULGATION: La présente invention concerne un procédé de préparation d'alumine au moins partiellement sous forme de boehmite ultra-fine. Selon une mise en oeuvre particulière de l'invention, l'alumine au moins partiellement sous forme de boehmite ultra-fine est obtenue par traitement dans un milieu aqueux ayant un pH inférieur à 9 d'une poudre d'alumine active obtenue par déshydratation rapide d'hydrargillite dans un courant de gaz chauds. L'alumine obtenue peut être utilisée éventuellement après séchage et calcination comme charge, liant, épaississant, dispersant, agent filmogène, renforçateur, membrannes, matière de base pour supports de catalyseurs.

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