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:
Jul. 12, 2011
Filed:
Mar. 24, 2006
M. Sundaram Krishnamoorthy, Columbia, MD (US);
Michael Scott Ziebarth, Columbia, MD (US);
George Yaluris, Clarksville, MD (US);
Roger Jean Lussier, Ellicott City, MD (US);
John Allen Rudesill, Columbia, MD (US);
M. Sundaram Krishnamoorthy, Columbia, MD (US);
Michael Scott Ziebarth, Columbia, MD (US);
George Yaluris, Clarksville, MD (US);
Roger Jean Lussier, Ellicott City, MD (US);
John Allen Rudesill, Columbia, MD (US);
W. R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
A NOreduction composition and process of using the composition to reduce the content of NOemissions and gas phase reduced nitrogen species released from the regeneration zone during fluid catalytic cracking of a hydrocarbon feedstock into lower molecular weight components is disclosed. The process comprises contacting a hydrocarbon feedstock during a fluid catalytic cracking (FCC) process wherein a regeneration zone of an fluid catalytic cracking unit (FCCU) is operated in a partial or incomplete combustion mode under FCC conditions, with a circulating inventory of an FCC cracking catalyst and a particulate NOreduction composition. The NOreduction composition has a mean particle size of greater than 45 μm and comprises (1) a zeolite component having (i) a pore size of form 2-7 A Angstroms and (ii) a SiOto AlOmolar ratio of less than 500, and (2) at least one noble metal selected from the group consisting of platinum, palladium, rhodium, iridium, osmium, ruthenium, rhenium and mixtures thereof.