Method for recycling zirconium tetrafluoride into zirconia

Details Method for recycling zirconium tetrafluoride into zirconia Method for recycling zirconium tetrafluoride into zirconia

2011-08-02

2011-08-02

Nguyen, Ngoc-Yen M (Department: 1734)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S069000, C423S492000

Reexamination Certificate

active

07988946

ABSTRACT:
The method allows ZrF4to be converted into ZrO2, by carrying out a thermal conversion operation based on solid ZrF4and water which are heated in a reactor until converted into ZrO2. The initial ratio by weight of ZrF4to water is in particular between 1/5 and 1/500, and this ratio is maintained substantially for the entire duration of the conversion. The thermal conversion is carried out at a temperature greater than or equal to 300° C. The invention is used in particular for recycling pickling baths for zirconium alloys.

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Search Report from French Patent Application No. : FR 0506697 mailed Apr. 5, 2006.

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