| 摘要 |
<p>The invention concerns an improved method for simultaneously producing very high quality oil bases and high quality middle distillates, comprising in successive steps of hydroisomerization and catalytic dewaxing. The hydroisomerization step is carried out in the presence of a catalyst containing at least a noble metal deposited on an amorphous acid support, the metal dispersion being 20-100 %. The support is preferably an amorphous silica-alumina support. The catalytic dewaxing is carried out in the presence of a catalyst containing at least a hydro-dehydrogenating element (group VIII) and at least a molecular sieve, selected among ZBM-30, EU-2 and EU 11.</p> |
