Appeal 2007-4101
Application 09/962,972
STATEMENT OF THE CASE
The subject matter on appeal is directed to a filtered adsorption vessel
filled with “granulated or powdered, solid, water-insoluble adsorption
media, particularly [iron oxides and/or] iron (oxy)hydroxides…”
(Specification 1, ll. 4-7). According to pages 9 and 10 of the Specification:
The invention also relates to a process for the production
of particles from fine-particle iron oxide and/or iron
oxyhydroxide comprising the steps of producing an aqueous
suspension of fine-particle iron oxides and/or iron
oxyhydroxides having a BET surface area of 50 to 500 m2/g,
removing the water and dissolved constituents by either
I) a) first removing only the water from the suspension,
b) introducing the residue thus obtained in water, c) filtering the
material obtained, d) washing the residue, and e) either el)
completely dehydrating the filter cake obtained as residue and
comminuting the filter cake to the desired shape and/or size or
e2) partially dehydrating it to obtain a paste, shaping the paste
and subsequently additionally drying the paste until a
pellet is obtained, or
II) a) filtering the suspension, b) washing the residue, c)
either cl) completely dehydrating the filter cake obtained as
residue in the form of a solid to semisolid paste and then
comminuting the material thus obtained to the desired shape
and/or size or c2) partially dehydrating it to obtain a paste,
shaping the paste, followed by subsequent additional drying
until a pellet is obtained. [Emphasis added.]
2
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