C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 39/54 (2006.01) B01J 29/85 (2006.01) C01B 37/08 (2006.01)
Patent
CA 2732277
The present invention is a method for synthesizing non-zeolitic molecular sieves which have a three dimensional microporous framework comprising [AlO2] and [PO2] units. In preparing the reaction mixture, a surfactant is used, coupled with non-aqueous impregnation to prevent acid sites from being destroyed by water during Pt impregnation. The superior SAPO exhibits higher activity and selectivity especially in catalytic hydroisomerization of waxy feeds, due to the presence of medium-sized silica islands distributed throughout the SAPO.
La présente invention concerne un procédé permettant la synthèse de tamis moléculaires non-zéolitiques comportant un réseau tridimensionnel microporeux comprenant des unités [AlO2] et [PO2]. Pour la préparation du mélange de réaction, on utilise un tensioactif associé à une imprégnation non-aqueuse de façon à empêcher la destruction des sites acides par l'eau pendant l'imprégnation du phosphore total. Ce silico-alumino-phosphate supérieur présente des niveaux d'activité et de sélectivité plus élevés, particulièrement pendant l'hydro-isomérisation des charges cireuses, en raison de la présence d'îlots de silice de dimensions moyennes répartis dans l'ensemble du silico-alumino-phosphate.
Chevron U.s.a. Inc.
Sim & Mcburney
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