Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Reexamination Certificate
2006-06-20
2006-06-20
Bos, Steven (Department: 1754)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
C423S260000, C423S261000, C423S483000, C423S490000, C422S139000, C422S142000, C422S159000
Reexamination Certificate
active
07063823
ABSTRACT:
A depleted UF6processing plant including a first fluidized bed reactor configured to react depleted UF6with steam to produce UO2F2and hydrogen fluoride, a second fluidized bed reactor connected to the first fluidized bed reactor and configured to react the UO2F2with steam to produce U3O8, hydrogen fluoride and oxygen, a gas cooler configured to cool the hydrogen fluoride generated in the first and second fluidized bed reactors down to 150 to 300° C., and a fluorine fixing reactor containing granular calcium carbonate and connected to the gas cooler to receive the hydrogen fluoride cooled down to 150 to 300° C. from the gas cooler. The fluorine fixing reactor is configured to form granular calcium fluoride from the granular calcium carbonate and the hydrogen fluoride passing through the fluorine fixing reactor.
REFERENCES:
patent: 3743704 (1973-07-01), West
patent: 4830841 (1989-05-01), Urza
patent: 5382423 (1995-01-01), Ohmi et al.
Bos Steven
Mitsubishi Materials Corporation
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