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:
Mar. 29, 2011
Filed:
Sep. 29, 2006
Robert Mehlberg, Wheaton, IL (US);
Frank Rosser, Jr., LaGrange Park, IL (US);
Zhihao Fei, Naperville, IL (US);
Carl Stevens, Lake Forest, IL (US);
Robert Mehlberg, Wheaton, IL (US);
Frank Rosser, Jr., LaGrange Park, IL (US);
Zhihao Fei, Naperville, IL (US);
Carl Stevens, Lake Forest, IL (US);
UOP LLC, Des Plaines, IL (US);
Abstract
An FCC process producing lower NOx emissions during regeneration by using excess oxygen levels at less than or equal to about 0.5 mol-% and a plenum temperature above about 730° C. (about 1350° F.). The process may further include limiting the Pt content in the catalyst to less than or equal to about 0.5 ppm. NOemissions, NO to NO, produced through this process may be equal to or less than 25 ppmv. The process may also include adjusting the metal content of the feedstock for such metals as antimony, nickel, or vanadium. Additional variables for reducing NOemissions that may be used in conjunction with this process may include increasing the flue gas residence time, injecting NHinto the flue gas, adding or using NO-reducing catalysts, increasing stripping of the catalyst, and increasing the catalyst zeolite to matrix ratio.