Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2007-09-12
2011-12-13
Nguyen, Cam N. (Department: 1736)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S261000, C502S262000, C502S263000, C502S333000, C502S334000, C502S339000, C502S407000, C502S415000, C502S439000
Reexamination Certificate
active
08076263
ABSTRACT:
The present invention is directed to an improved catalyst support and to the resultant catalyst suitable for treating exhaust products from internal combustion engines, especially diesel engines. The support of the present invention is a structure comprising alumina core particulate having high porosity and surface area, wherein the structure has from about 1 to about 40 weight percent silica in the form of cladding on the surface area of said alumina core. The resultant support has a normalized sulfur uptake (NSU) of up to 15 μg/m2.
REFERENCES:
patent: 2804433 (1957-08-01), Hervert et al.
patent: 3207700 (1965-09-01), Saffer
patent: 3269939 (1966-08-01), Marechal et al.
patent: 3526602 (1970-09-01), Kajita et al.
patent: 3703461 (1972-11-01), Hamsford
patent: 3923692 (1975-12-01), Braithwaite et al.
patent: 3925253 (1975-12-01), Stephens
patent: 4059544 (1977-11-01), Yamaguchi et al.
patent: 4070286 (1978-01-01), Iler et al.
patent: 4105426 (1978-08-01), Iler et al.
patent: RE29771 (1978-09-01), Cull et al.
patent: 5182016 (1993-01-01), Funkenbusch et al.
patent: 5271833 (1993-12-01), Funkenbusch et al.
patent: 6280608 (2001-08-01), Jensen et al.
patent: 6288007 (2001-09-01), Lindblad et al.
patent: 6399530 (2002-06-01), Chen et al.
patent: 6756515 (2004-06-01), Rende et al.
patent: 7638459 (2009-12-01), Rende et al.
patent: 7815792 (2010-10-01), Bauer et al.
patent: 2002/0157535 (2002-10-01), Kanazirev et al.
patent: 2003/0162849 (2003-08-01), Van Berge et al.
patent: 2005/0284799 (2005-12-01), Bauer et al.
patent: 2006/0270865 (2006-11-01), Wang et al.
patent: 05 3830318 (1990-03-01), None
Brezny Rasto
Chapman David Monroe
Koranne Manoj Mukund
Pryor James Neil
Cross Charles A.
Nguyen Cam N.
Troffkin Howard J.
W. R. Grace & Co.,-Conn.
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