An amorphous silica-alumina composition and a method of...

Details An amorphous silica-alumina composition and a method of... An amorphous silica-alumina composition and a method of...

B - Operations, Transporting

01

J

B01J 21/12 (2006.01) B01J 23/44 (2006.01) B01J 35/10 (2006.01)

Patent

CA 2697371

Described is a novel amorphous silica-alumina composition having a high ratio of pore volume contained in large pores to pore vol-ume contained in medium to small pores. The amorphous silica-alumina composition also may have the characteristic of a strong aluminium--NMR penta-coordinated peak representing greater than 30% of the total aluminum and a method of making such novel amorphous silica-alumina composition using a pH swing preparation method.

Cette invention concerne une composition silice-alumine amorphe présentant un rapport volume poreux contenu dans des pores de grande taille sur volume poreux contenu dans des pores de moyenne ou petite taille élevé. La composition silice-alumine amorphe peut également se caractériser par un fort pic coordonné penta aluminium-NMR représentant plus de 30% de l'aluminium total. L'invention concerne également un procédé permettant de fabriquer une telle composition silice-alumine amorphe au moyen d'un procédé de préparation par variation du pH.

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