Appeal No. 1998-1832
Application No. 08/434,331
waste streams from the production of cellulose pulp. See column 1, lines 54-62.
However, both fluid waste streams result from the production of cellulose pulp. Id. The
streams differ from each other only in that the second stream has a greater sulfur content.
Id. The constituents added to the second stream may include waste acid from a chlorine
dioxide plant. See column 2, lines 19-20. The claimed subject matter, however, is
directed to a totally chlorine free process, and the addition of waste from a chlorine
dioxide plant is not within the scope of the claimed subject matter.
The apparatus of Henricson further contains means for combusting the first and
second waste streams separately to produce first and second melts. See column 3, lines
32-33. The means preferably comprises a soda recovery boiler having at least two
different melt sections and a common waste gas discharge. See column 3, lines 39-41.
The soda recovery boiler contains a combustion chamber with partition means for
dividing the combustion chamber into a first and second melt producing volume. See
column 3, lines 54-56. The pulp discharged from the digester may be bleached. See
column 4, lines 33-43. Thereafter the pulp is washed to remove the chemicals from the
pulp, for example by countercurrent washing. Id. The washing agent from the last
washing stage to which the chemicals have been concentrated is thereafter directed to the
same recovery process of the chemicals. See column 4, lines 45-48. Accordingly, we
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