Appeal 2006-2735
Application 10/758,552
We AFFIRM.
BACKGROUND OF THE INVENTION
Appellants’ invention relates to a catalyst composition for use in water
gas shift reactions. The claimed invention requires a catalyst to include a
primary transition metal, a transition metal promoter, and a support material
comprising cerium oxide. Claim 1, as presented in the Brief, appears below:
1. A catalyst suitable for production of hydrogen, said catalyst
consisting essentially of:
a. a primary transition metal selected from the group consisting
of Group VIII metal, a Group IB metal, cadmium and combinations
thereof, said primary transition metal being present at a predetermined
concentration [Primary TM];
b. a transition metal promoter present at a predetermined
concentration [Promoter] selected such that a ratio defined by
[Primary TM]:[Promoter] is greater than 1:1; and
c. a support material comprising cerium oxide and an additive
selected from the group consisting of gadolinium, samarium,
zirconium, lithium, cesium, lanthanum, praseodymium, manganese,
titanium, tungsten, neodymium, and a combination thereof,
wherein said transition metal and said promoter are combined with said
support material to form said catalyst.
The Examiner relies on the following references in rejecting the
appealed subject matter:
Igarashi WO 00/54879 Sep. 21, 2000
Chintawar WO 00/66486 Nov. 9, 2000
Igarashi (as translated) EP 1 161 991 A1 Dec. 12, 2001
Silver US 6,455,182 B1 Sep. 24, 2002
2
Page: Previous 1 2 3 4 5 6 Next
Last modified: September 9, 2013