C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
C10G 65/04 (2006.01) C10G 67/04 (2006.01)
Patent
CA 2509231
Process to prepare a base oil having a viscosity index of between 80 and 140 starting from a distillate or a de-~asphalted oil by (a) contacting the feedstock in the presence of hydrogen with a sulphided hydrodesulphurisation catalyst comprising nickel and tungsten on an acid amorphous silica-alumina carrier and (b) performing a pour point reducing step on the effluent of step (a) to obtain the base oil.
L'invention concerne un procédé de préparation d'une huile de base possédant un indice de viscosité compris entre 80 et 140 à partir d'une huile distillée ou désasphaltée. Ce procédé consiste (a) à mettre en contact la matière de base en présence d'hydrogène avec un catalyseur d'hydrodésulfurisation sulfuré contenant du nickel et du tungstène sur un support silice-alumine amorphe acide et (b) à effectuer une réduction de point d'écoulement sur l'effluent de l'étape (a) afin d'obtenir l'huile de base.
Moureaux Patrick
Van Veen Johannes Anthonius Robert
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Shell Internationale Research Maatschappij B.v.
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