Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2011-01-25
2011-01-25
Vanoy, Timothy C (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S303000, C502S304000, C502S308000, C502S326000, C502S347000, C060S299000
Reexamination Certificate
active
07875572
ABSTRACT:
The present invention provides a catalyst for combustion treatment of suspended particulate matter in diesel exhaust gases, and a combustion catalyst for treating diesel exhaust gases in which a precious metal or an oxide thereof as the catalytic component is loaded on a carrier composed of oxide ceramic particles comprising ceria-zirconia or ceria-praseodymium oxide. In the present invention, depending on the carried precious metal, the carrier is preferably composed of oxide ceramic particles further comprising yttria or lanthanum oxide. The present invention provides a sufficient activity to combust suspended particulate matter in exhaust gases, and can cause combustion at a low temperature of about 300° C. It operates stably for a long period, and can burn suspended particulate matter, especially carbon microparticles.
REFERENCES:
patent: 4940685 (1990-07-01), Sauvion et al.
patent: 5000929 (1991-03-01), Horiuchi et al.
patent: 5137862 (1992-08-01), Mackrodt et al.
patent: 5413984 (1995-05-01), Marecot et al.
patent: 6107240 (2000-08-01), Wu et al.
patent: 6455182 (2002-09-01), Silver
patent: 1399245 (2004-03-01), None
patent: 02-014744 (1990-01-01), None
patent: 10-151348 (1998-06-01), None
patent: 2000-176282 (2000-06-01), None
patent: 2001-104780 (2001-04-01), None
patent: 2001-170483 (2001-06-01), None
patent: 2002-221022 (2002-08-01), None
patent: 2003-135970 (2003-05-01), None
patent: WO 02/22242 (2002-03-01), None
patent: WO 2004/047985 (2004-06-01), None
A.D. Logan and M. Shelef, “Oxygen availability in mixed cerium/praseodymium oxides and the effect of noble metals,” J. Mater. Res. vol. 9, No. 2, Feb. 1994, pp. 468-475.
Sumeya Bedrane et al; “Investigation of the Oxygen Storage Process on Ceria and Ceria-zirconia-Supported Catalyst” Catalysis Today; vol. 75, Dec. 31, 2002. pp. 401-405, XP002598548.
Paolo Fornasiero et al.: “Metal Loaded CEo2-zRo2Solutions As Innovative Catalysts For Automotivecatalytic Converters” Catalysis Today. vol. 29, Dec. 31, 1996. pages 47-52, XP002598549.
Fernando Marino et al.: “Noble Metal Catalysts for the Preferential Oxidation of Carbon Monoxide in the Presence of Hydrogen (Prox)” Applied Catalysis B:Environmental vol. 54, Jul. 23, 2004, pp. 59-66, XP002598550.
J.M. Gatica et al.: “Characterization of The Metal Phase in NM/Ce0 63Zr0 3202(NM:Pt and Pd) Catalysts by Hydrogen Chemisorption and HRTEM Microscopy: A Comparative Study” J. Phys. Chem B, vol. 105, Dec. 31, 2001, pp. 1191-1199, XP002598551.
Itaya Kazuto
Kikuhara Shunji
Kubo Hitoshi
Sasaki Masahiro
Yamashita Takeshi
Liao Diana J
Roberts & Roberts, LLP
Tanaka Kikinzoku Kogyo K.K.
Vanoy Timothy C
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