Method for magnesium sulfate recovery

Patent · Thu Jan 01 00:00:00 EST 1987

OSTI ID:866353

Gay, Richard L ^[1]; Grantham, LeRoy F ^[2]

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1. Canoga Park, CA
2. Calabasas, CA

A method of obtaining magnesium sulfate 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 then contacted with a concentrated sulfuric acid under certain prescribed conditions to produce a liquid product and a solid product. The particulate solid product and a minor amount of the liquid is then treated to produce a solid residue consisting essentially of magnesium sulfate substantially free of uranium and having a residual radioactivity level of less than 1000 pCi/gm. In accordance with the preferred embodiment of the invention, a catalyst and an oxidizing agent are used during the initial acid treatment and a final solid residue has a radioactivity level of less than about 50 pCi/gm.

• 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 4689178
• OSTI ID: 866353
• Country of Publication: United States
• Language: English

Related Subjects

method
magnesium
sulfate
recovery
obtaining
substantially
free
radioactive
uranium
slag
containing
radioactivity
level
7000
pci
gm
ground
particle
size
200
microns
contacted
concentrated
sulfuric
acid
prescribed
conditions
produce
liquid
product
solid
particulate
minor
amount
treated
residue
consisting
essentially
residual
1000
accordance
preferred
embodiment
catalyst
oxidizing
agent
initial
treatment
final
50
particulate solid
radioactivity level
slag containing
substantially free
consisting essentially
preferred embodiment
particle size
sulfuric acid
liquid product
solid residue
oxidizing agent
minor amount
solid product
concentrated sulfuric
magnesium sulfate
radioactive uranium
obtaining magnesium
oxidizing agen
/588/423/