PROCEDE FLEXIBLE AMELIORE DE PRODUCTION DE BASES HUILES ET DE DISTILLATS PAR UNE CONVERSION-HYDROISOMERISATION SUR UN CATALYSEUR FAIBLEMENT DISPERSE SUIVIE D'UN DEPARAFFINAGE CATALYTIQUE

摘要

The invention concerns a method for simultaneously producing very high quality oil bases and high quality middle distillates comprising successive steps of hydroisomerization and catalytic dewaxing. The hydroisomerization 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 less than 20 %. The support is preferably an amorphous silica-alumina. 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.