Magnesium fluoride recovery method

Patent · Sun Jan 01 00:00:00 EST 1989

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., Canoga Park, CA (United States)
• 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

magnesium
fluoride
recovery
method
obtaining
substantially
free
radioactive
uranium
slag
containing
radioactivity
level
7000
pci
gm
ground
particle
size
200
microns
contacted
acid
prescribed
conditions
produce
liquid
product
particulate
solid
separated
treated
times
residue
consisting
essentially
residual
1000
accordance
particularly
preferred
embodiment
catalyst
oxidizing
agent
treatment
preferably
sulfuric
strength
normal
recovery method
magnesium fluoride
particularly preferred
particulate solid
radioactivity level
slag containing
substantially free
consisting essentially
preferred embodiment
particle size
sulfuric acid
liquid product
solid residue
oxidizing agent
solid product
radioactive uranium
obtaining magnesium
oxidizing agen
/423/