Magnesium fluoride recovery method

Patent · Sat Dec 31 23:00:00 EST 1988

OSTI ID:867137

Gay, Richard L ^[1]; McKenzie, Donald E ^[2]

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1. Canoga Park, CA
2. Woodland Hills, CA

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.

• Research Organization: ROCKWELL INTERNATIONAL CORP
• DOE Contract Number: AT03-83SF11948
• Assignee: Rockwell International Corporation (El Segundo, CA)
• Patent Number(s): US 4874599
• OSTI ID: 867137
• Country of Publication: United States
• Language: English

Related Subjects

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1000
200
7000
accordance
acid
agent
catalyst
conditions
consisting
consisting essentially
contacted
containing
embodiment
essentially
fluoride
free
gm
ground
level
liquid
liquid product
magnesium
magnesium fluoride
method
microns
normal
obtaining
obtaining magnesium
oxidizing
oxidizing agen
oxidizing agent
particle
particle size
particularly
particularly preferred
particulate
particulate solid
pci
preferably
preferred
preferred embodiment
prescribed
produce
product
radioactive
radioactive uranium
radioactivity
radioactivity level
recovery
recovery method
residual
residue
separated
size
slag
slag containing
solid
solid product
solid residue
strength
substantially
substantially free
sulfuric
sulfuric acid
times
treated
treatment
uranium