Appeal No. 2004-2028
Application No. 09/423,746
APPEALED SUBJECT MATTER
Claims 1 and 13 are representative of the subject matter on
appeal and read as follows:
1. Solid pulverulent reactive composition for the
purification of a gas, comprising at least 90% by weight of sodium
bicarbonate and a caking inhibitor for sodium bicarbonate and being
devoid of silica, said inhibitor comprising lignite coke and/or a
magnesium compound selected from the group consisting of magnesium
oxide, magnesium hydroxide, mixtures of magnesium oxide and
magnesium hydroxide and magnesium hydroxycarbonate, wherein said
composition exhibiting a mean particle size of less than 50 :m and
a particle size slope of less than 5 and wherein said inhibitor is
present in an amount by weight of greater than 0.5% of the weight
of sodium bicarbonate.
13. The composition of Claim 1 wherein the particle size
slope is defined by F, wherein
F = D90-D10
D50
wherein D90 respresents the diameter at which 90% of the
particles of the reactive composition (expressed by weight) have a
diameter of less than D90;
wherein D50 represents the diameter at which 50% of the
particles of the reactive composition (expressed by weight) have a
diameter of less D50; and
wherein D10 represents the diameter at which 10% of the
particles of the reactive composition (expressed by weight) have a
diameter of less than D10.
2
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