Appeal No. 1997-0664
Application No. 08/280,945
rejection. These are the only claims remaining in the1
application.
Claims 1, 14, and 25 are illustrative of the claims on
appeal and are reproduced below:
1. In a process for the regeneration of
hydrochloric acid used as a pickling acid in a
pickling bath, wherein iron chloride is produced in
said pickling bath and wherein said regeneration
process includes the thermal decomposition of said
iron chloride in the spent pickling acid from said
pickling bath into iron oxide and gaseous
hydrochloric acid and molecular chlorine, the
improvement comprising admixing with the spent
pickling acid from said pickling bath at least one
compound which contains nitrogen having a low
oxidation number whereby said at least one compound
reacts with said molecular chlorine to regenerate
said hydrochloric acid and produce molecular
nitrogen.
14. In a process for the regeneration of
hydrochloric acid used as a pickling acid in a
pickling bath, wherein iron chloride is produced in
said pickling bath and wherein said regeneration
process includes the thermal decomposition of said
iron chloride in the spent pickling acid from said
pickling bath into iron oxide and gaseous
hydrochloric acid and molecular chlorine and further
including the formation of nitrogen oxides, the
improvement comprising admixing with the spent
1See the amendments filed September 29, 1995 and
December 29, 1995 (Paper No. 9 and Paper No. 12), which the
examiner indicated in two separate advisory actions as being
approved for entry upon the filing of an appeal (Paper No. 10
and Paper No. 13).
2
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