La/nd-spinel compositions for metals passivation in fcc...

C - Chemistry – Metallurgy – 10 – G

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C10G 11/05 (2006.01) B01J 23/00 (2006.01) B01J 23/10 (2006.01) B01J 23/90 (2006.01)

Patent

CA 2220496

Catalytic cracking catalysts and additives which comprise a metals passivation component containing: 15-60 parts by weight MgO, 30-60 parts by weight Al2O3, and 10-30 parts by weight rare earth compound selected from the group consisting of La oxide, Nd oxide, and mixtures thereof, wherein at least a portion of the MgO and Al2O3 are in the form of an Mg-Al oxide spinel, are especially useful for catalytic cracking processes involving hydrocarbon feedstocks containing high metals (e.g. vanadium) content. The La/Nd compound may be one which forms La and/or Nd oxide during the FCC process cracking or regeneration step.

L'invention concerne des catalyseurs de craquage et des additifs qui comprennent un composant de passivation de métaux contenant 15-60 parties en poids de MgO, 30-60 parties en poids de Al>2<O>3< et 10-30 parties en poids de composés de la classe des terres rares choisis dans le groupe constitué de l'oxyde de La, de l'oxyde de Nd et de leurs mélanges, au moins une partie du MgO et de l'Al>2<O>3< se présentant sous la forme d'un spinelle d'oxydes Mg-Al. Ces compositions sont particulièrement utiles pour des procédés de craquage catalytique d'hydrocarbures ayant une teneur élevée en métaux (tel que le vanadium). Le composé La/Nd peut être un composé qui forme un oxyde de La et/ou de Nd durant le procédé de craquage catalytique fluide ou durant l'opération de régénération.

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