Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2005-04-19
2005-04-19
Nguyen, Cam N. (Department: 1754)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C502S241000, C502S242000, C502S243000, C502S244000, C502S245000, C502S247000, C502S250000, C502S251000, C502S252000, C502S257000, C502S261000, C502S262000, C502S263000, C502S302000, C502S303000, C502S304000, C502S309000, C502S312000, C502S314000, C502S318000, C502S326000, C502S327000, C502S328000, C502S330000, C502S331000, C502S333000, C502S334000, C502S339000, C502S415000, C502S439000
Reexamination Certificate
active
06881390
ABSTRACT:
Compositions for reduction of gas phase reduced nitrogen species and NOxgenerated during a partial or incomplete combustion catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise (i) an acidic metal oxide containing substantially no zeolite, (ii) an alkali metal, alkaline earth metal, and mixtures thereof, (iii) an oxygen storage component, and (iv) a noble metal component, preferably rhodium or iridium, and mixtures thereof, are disclosed. Preferably, the compositions are used as separate additives particles circulated along with the circulating FCC catalyst inventory. Reduced emissions of gas phase reduced nitrogen species and NOxin an effluent off gas of a partial or incomplete combustion FCC regenerator provide for an overall NOxreduction as the effluent gas stream is passed from the FCC regenerator to a CO boiler, whereby as CO is oxidized to CO2a lesser amount of the reduced nitrogen species is oxidized to NOx.
REFERENCES:
patent: 3700745 (1972-10-01), Kovach et al.
patent: 4151121 (1979-04-01), Gladrow
patent: 4171287 (1979-10-01), Keith
patent: 4212771 (1980-07-01), Hamner
patent: 4285806 (1981-08-01), Mooi
patent: 4290878 (1981-09-01), Blanton, Jr.
patent: 4368057 (1983-01-01), Matthews
patent: 4427536 (1984-01-01), Klaassen et al.
patent: 4434147 (1984-02-01), Dimpfl et al.
patent: 4473658 (1984-09-01), Schwartz
patent: 4495305 (1985-01-01), Yoo et al.
patent: 4537875 (1985-08-01), Toulhoat et al.
patent: 4613428 (1986-09-01), Edison
patent: 4744962 (1988-05-01), Johnson et al.
patent: 4755282 (1988-07-01), Samish et al.
patent: 4812431 (1989-03-01), Child
patent: 4839026 (1989-06-01), Brown et al.
patent: 4923842 (1990-05-01), Summers
patent: 4959339 (1990-09-01), Arai
patent: 4973399 (1990-11-01), Green et al.
patent: 5015362 (1991-05-01), Chin
patent: 5021144 (1991-06-01), Altrichter
patent: 5057205 (1991-10-01), Chin
patent: 5164350 (1992-11-01), Abe et al.
patent: 5413699 (1995-05-01), Chou
patent: 5547648 (1996-08-01), Buchanan et al.
patent: 5716514 (1998-02-01), Buchanan
patent: 5830346 (1998-11-01), Harandi et al.
patent: 5863855 (1999-01-01), Nojima et al.
patent: 6027696 (2000-02-01), Das et al.
patent: 6129834 (2000-10-01), Peters et al.
patent: 6143167 (2000-11-01), Peters et al.
patent: 6159897 (2000-12-01), Suzuki et al.
patent: 6165933 (2000-12-01), Peters et al.
patent: 6280607 (2001-08-01), Peters et al.
patent: 6492297 (2002-12-01), Sung
patent: 6511933 (2003-01-01), Shibasaki et al.
patent: 20010016184 (2001-08-01), Campbell et al.
Rudesill John Allen
Yaluris George
Artale Beverly J.
Nguyen Cam N.
W. R. Grace & Co.,-Conn.
LandOfFree
NOx reduction compositions for use in FCC processes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with NOx reduction compositions for use in FCC processes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NOx reduction compositions for use in FCC processes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3386702