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:
Aug. 08, 2006
Filed:
Nov. 06, 2002
Sonja Eijsbouts, Nieuwkuijk, NL;
Franciscus Wilhelmus Houtert, Landsmeer, NL;
Marcel Adriaan Jansen, Nieuw-Vennep, NL;
Tetsuro Kamo, Ehime pref., JP;
Frans Lodewijk Plantenga, Amersfoort, NL;
Sonja Eijsbouts, Nieuwkuijk, NL;
Franciscus Wilhelmus Houtert, Landsmeer, NL;
Marcel Adriaan Jansen, Nieuw-Vennep, NL;
Tetsuro Kamo, Ehime pref., JP;
Frans Lodewijk Plantenga, Amersfoort, NL;
Albemarle Corporation, Richmond, VA (US);
Abstract
The present invention pertains to a process for regenerating and rejuvenating an additive-based hydrotreating catalyst containing Group VIB and Group VIII hydrogenation metals. The process comprises the steps of regenerating the catalyst by contacting it with an oxygen-containing gas at a maximum temperature of 500° C., followed by rejuvenating the catalyst by contacting it with an organic additive comprising an organic compound, other than a compound that the catalyst is contacted with in the course of its use as a catalyst prior to regeneration and rejuvenation. The organic additive is incorporated into the catalyst. If necessary, the catalyst may then be dried at such a temperature that at least 50% of the additive is maintained in the catalyst. The process according to the invention makes it possible to restore the activity of a used additive-based hydrotreating catalyst to its original level, or even to improve it to above that level.