The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2005
Filed:
Apr. 20, 2001
Eric Benazzi, Chatou, FR;
Pierre Marion, Antony, FR;
Alain Billon, Le Vesinet, FR;
Christophe Gueret, St Romain en Gal, FR;
Jean-claude Hipeaux, Colombes, FR;
Jean Paul Gouzard, Rueil Malmaison, FR;
Eric Benazzi, Chatou, FR;
Pierre Marion, Antony, FR;
Alain Billon, Le Vesinet, FR;
Christophe Gueret, St Romain en Gal, FR;
Jean-Claude Hipeaux, Colombes, FR;
Jean Paul Gouzard, Rueil Malmaison, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
A process for the production of very high quality base oils optionally with simultaneous production of high quality middle distillates comprises the stages for hydrotreatment, preferably hydrocracking, on Y or beta zeolite, and atmospheric distillation. The effluent is subjected to a catalytic dewaxing on the ZSM-48 catalyst. The process then comprises a hydrofinishing stage for hydrogenating the aromatic compounds, preferably on a catalyst that comprises at least one noble metal of group VIII, chlorine and fluorine, and the stages of atmospheric and vacuum distillation. The hydrofinishing stage is conducted at a temperature lower by 20-200° C. than the catalytic dewaxing stage.