A silicoaluminophospahte isomerisation catalyst

B - Operations – Transporting – 01 – J

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B01J 29/85 (2006.01) C10G 45/60 (2006.01)

Patent

CA 2646590

A catalyst system for treating a hydrocarbonaceous feed comprising a matrix selected from the group consisting of alumina, silica alumina, titanium alumina and mixtures thereof; a support medium substantially uniformly distributed through said matrix comprising a SAPO-11 molecular sieve; and about 0.1 to about 1.0 wt % (based on the total weight of the catalyst system) of a catalytically active metal phase supported on said medium and comprising a metal selected from the group consisting of platinum, palladium, ruthenium, rhodium or mixtures thereof. The catalyst system is characterized in that said SAPO-11 molecular sieve has: a) a silica to alumina molar ratio of about 0.08 to about 0.24,- b) a phosphorous to alumina ratio of about 0.75 to about 0.83; c) a microsurface area of at least about 150m2/g; d) a crytallite size in the range of abouth 250 to about 600 angstroms, and e) a sodium content of less than about 2000 ppm weight.

L'invention concerne un système catalytique destiné à traiter une charge d'alimentation hydrocarbonée et comprenant une matrice choisie dans le groupe constitué par l'alumine, l'alumine de silice, l'alumine de titane et des mélanges correspondants, un milieu de support distribué de manière sensiblement uniforme dans la matrice et comprenant un tamis moléculaire SAPO-11, et entre environ 0,1 et environ 1,0% en poids (sur la base du poids total du système catalytique) d'une phase métallique catalytiquement active supportée sur ledit milieu et renfermant un métal choisi dans le groupe constitué par le platine, le palladium, le ruthénium, le rhodium ou des mélanges correspondants. Ce système catalytique se caractérise en ce que le tamis moléculaire SAPO-11 présente (a) un rapport molaire silice/alumine compris entre environ 0,08 et environ 0,24, (b) un rapport phosphore/alumine compris entre environ 0,75 et environ 0,83, (c) une surface active d'au moins environ 150 m2/g, (d) une taille des cristallites comprise entre environ 250 et environ 600 angströms, et (e) une teneur en sodium inférieure à environ 2000 ppm en poids.

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