Magnesium fluoride recovery method

Details Magnesium fluoride recovery method Magnesium fluoride recovery method

C - Chemistry, Metallurgy

01

F

23/175

C01F 5/28 (2006.01) C22B 7/04 (2006.01) C22B 60/02 (2006.01) G21F 9/30 (2006.01)

Patent

CA 1286478

Abstract of the Invention A method of obtaining magnesium fluoride substantially free from radioactive uranium from a slag containing the same and having a radioactivity level of at least about 7000 pCi/gm. The slag is ground to a particle size of about 200 microns or less. The ground slag is contacted with an acid under certain prescribed conditions to produce a liquid product and a particulate solid product. The particulate solid product is separated from the liquid and treated at least two more times with acid to produce a solid residue consisting essentially of magnesium fluoride substantially free of uranium and having a residual radioactivity level of less than about 1000 pCi/gm. In accordance with a particularly preferred embodiment of the invention a catalyst and an oxidizing agent are used during the acid treatment and preferably the acid is sulfuric acid having a strength of about 1.0 Normal. 4524P

510801

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