Appeal No. 94-4357
Application No. 07/739,050
Claims 1, 8 and 13 are representative of the subject
matter on appeal and read as follows:
1. A method for conditioning an ozone gas recycle stream
in an ozone pulp bleaching process, comprising:
providing an oxygen containing feed gas to an ozone
generator;
generating ozone from said feed gas to produce an ozone
rich oxygen gas;
bleaching pulp with said ozone rich gas, thereby
producing an exhaust gas containing contaminants including
carbon dioxide;
removing at least some of said contaminants to produce a
recycle gas;
directing said recycle gas into the ozone generator to
provide at least a portion of said oxygen containing feed gas;
and
removing carbon dioxide during said contaminant removal
step to a level of about 6 wt.% to thus allow operation of the
ozone generator at or approaching full capacity.
8. A method for conditioning an ozone gas recycle stream
in an ozone pulp bleaching process, comprising:
providing an oxygen containing feed gas to an ozone
generator;
generating ozone from said feed gas to produce an ozone
rich oxygen gas;
bleaching pulp with said ozone rich gas, thereby
producing an exhaust gas containing contaminants including
carbon dioxide;
2
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