| abstract |
The present invention relates to an improved process for the production of high quality base oils and to the simultaneous production of high quality intermediate distillates, which comprises a continuous hydroisomerisation step and a catalytic dewaxing step.n n n The hydroisomerization reaction is carried out in the presence of a catalyst containing at least one noble metal deposited on an amorphous acid support, the dispersity of this noble metal being 20 to 100%. Preferably the support is amorphous silica-alumina.n n n The catalytic dewaxing reaction is carried out in the presence of a catalyst containing at least one hydrogenated dehydrogenation element (Group VIII) and at least one molecular sieve (preferably zeolite). The molecular sieve is preferably selected from NU-10, EU-1, EU-13 zeolite and ferrierite. |