发明名称 |
Method for magnesium sulfate recovery |
摘要 |
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.
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申请公布号 |
US4689178(A) |
申请公布日期 |
1987.08.25 |
申请号 |
US19850798075 |
申请日期 |
1985.11.14 |
申请人 |
ROCKWELL INTERNATIONAL CORPORATION |
发明人 |
GAY, RICHARD L.;GRANTHAM, LEROY F. |
分类号 |
C01F5/40;C22B7/04;(IPC1-7):G21F9/00 |
主分类号 |
C01F5/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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