Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component
Reexamination Certificate
2007-12-04
2007-12-04
Brunsman, David M (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And additional al or si containing component
C502S066000, C502S067000, C502S068000, C502S073000, C502S074000, C502S077000, C502S078000, C502S079000
Reexamination Certificate
active
10824913
ABSTRACT:
Compositions for reduction of NOxgenerated 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 NOxcomposition containing particles of a zeolite having a pore size ranging from about 3 to about 7.2 Angstoms and a SiO2to Al2O3molar ratio of less than about 500. Preferably, the NOxreduction composition contains NOxreduction zeolite particles bound with an inorganic binder. In the alternative, the NOxreduction 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 NOxemissions 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.
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Yaluris George
Zhao Xinjin
Ziebarth Michael Scott
Artale Beverly J.
Brunsman David M
Cross Charles A.
W.R. Grace & Co. - Conn.
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