Lube hydroisomerization system

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 45/62 (2006.01) C10G 45/64 (2006.01) C10G 65/04 (2006.01)

Patent

CA 2499352

The present invention relates to a process for converting wax with a heavy component to high quality lube basestocks using a unidimensional intermediate pore molecular sieve with near circular pore structures having an average diameter of 0.50 nm to 0.65 nm wherein the difference between the maximum diameter and the minimum is <= 0.05 nm followed by a molecular sieve Zeolite Beta catalyst. Both catalysts comprise one or more Group VIII metals. For example, a cascaded two-bed catalyst system consisting of a first bed Pt/ZSM- 48 catalyst followed by a second bed Pt/Beta catalyst improves processing of heavy lubes.

L'invention concerne un procédé permettant de convertir une paraffine à composant lourd en huiles de base lubrifiantes de qualité élevée à l'aide d'un tamis moléculaire unidimensionnel à pores intermédiaires, les structures de pores presque circulaires présentant un diamètre moyen compris entre 0,50 nm et 0.65 nm, et la différence entre les diamètres maximum et minimum étant = 0,05 nm; et d'un catalyseur Zéolite Bêta à tamis moléculaire. Les deux catalyseurs comprennent un ou plusieurs métaux du groupe VIII. Un système de catalyseurs à cascade à deux lits comprenant, par exemple, un premier catalyseur Pt/ZSM-48 à un lit et un second catalyseur Pt/Bêta à un lit permet d'améliorer le traitement des lubrifiants lourds.

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