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:
May. 20, 2014
Filed:
Jun. 21, 2011
Anastasios Skoulidas, Bristow, VA (US);
Alvin U. Chen, Reston, VA (US);
Christopher Gordon Smalley, Manassas, VA (US);
Robert Frank. Tammera, Warrenton, VA (US);
Norihiro Nakashima, Falls Church, VA (US);
Anastasios Skoulidas, Bristow, VA (US);
Alvin U. Chen, Reston, VA (US);
Christopher Gordon Smalley, Manassas, VA (US);
Robert Frank. Tammera, Warrenton, VA (US);
Norihiro Nakashima, Falls Church, VA (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
The present invention relates to an improved design for use in fluid cracking processes, preferably used in either a fluid catalytic cracking ('FCC') process or a fluid coking process. In particular, the present invention relates to an apparatus and process for improving the separation and distributing spent catalyst and gases in a spent catalyst riser associated with a fluid cracking process, and most preferably for use in a spent catalyst riser associated with an FCC regenerator vessel. A novel catalyst distributor design and associated processes are presented herein which significantly improve combustion in the dense-phase fluidized catalyst bed of a regenerator and results in improved regenerator dense bed combustion and lower migration of oxygen into the regenerator overhead region. As a result, afterburn is significantly reduced in the regenerator and higher catalyst bed temperatures are achieved with significantly more uniform bed temperatures due to the improved combustion characteristics in the dense-phase fluidized catalyst bed.