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:
Dec. 04, 2007
Filed:
Apr. 15, 2004
George Yaluris, Columbia, MD (US);
Michael Scott Ziebarth, Columbia, MD (US);
Xinjin Zhao, Woodbine, MD (US);
George Yaluris, Columbia, MD (US);
Michael Scott Ziebarth, Columbia, MD (US);
Xinjin Zhao, Woodbine, MD (US);
W.R. Grace & Co. -Conn., Columbia, MD (US);
Abstract
Compositions for reduction of NOgenerated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeolite, and a particulate NOcomposition containing particles of a zeolite having a pore size ranging from about 3 to about 7.2 Angstoms and a SiOto AlOmolar ratio of less than about 500. Preferably, the NOreduction composition contains NOreduction zeolite particles bound with an inorganic binder. In the alternative, the NOreduction zeolite particles are incorporated into the cracking catalyst as an integral component of the catalyst. Compositions in accordance with the invention are very effective for the reduction of NOemissions released from the regenerator of a fluid catalytic cracking unit operating under FCC process conditions without a substantial change in conversion or yield of cracked products, e.g., gasoline and light olefins. Processes for the use of the compositions are also disclosed.