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:
Nov. 18, 2008
Filed:
Mar. 02, 2005
Brian A. Cunningham, Ellicott City, MD (US);
Todd R. Steffens, Centreville, VA (US);
James H. Beech, Jr., Kingwood, TX (US);
Richard E. Walter, Long Valley, NJ (US);
Brian A. Cunningham, Ellicott City, MD (US);
Todd R. Steffens, Centreville, VA (US);
James H. Beech, Jr., Kingwood, TX (US);
Richard E. Walter, Long Valley, NJ (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
This invention relates to efficiently regenerating catalyst particles by minimizing the formation of localized 'hot spots' and 'cold spots' in a regeneration zone. In one embodiment, the invention includes mixing spent catalyst from a reactor and cold catalyst from a catalyst cooler in a mixing zone and directing the mixed catalyst to the regeneration zone in a fluidized manner with a fluidizing medium. In the regeneration zone, the mixed catalyst contacts an oxygen-containing regeneration medium under conditions effective to regenerate the spent catalyst contained therein.