发明名称 |
Method of separating and purifying gadolinium-153 |
摘要 |
The present invention is an improvement to the method of separating and purifying gadolinium from a mixture of gadolinium and europium having the steps of (a) dissolving the mixture in an acid; (b) reducing europium+3 to europium+2; and (c) precipitating the europium+2 with a sulfate ion in a superstoichiometric amount; wherein the improvement is achieved by using one or more of the following: (i) the acid is an anoic acid; (ii) the reducing is with zinc metal in the absence of a second metal or with an amount of the second metal that is ineffective in the reducing; (iii) adding a group IIA element after step (c) for precipitating the excess sulfate prior to repeating step (c); (iv) the sulfate is a sulfate salt with a monovalent cation; (v) adding cold europium+3 prior to repeating step (c).
|
申请公布号 |
US6245305(B1) |
申请公布日期 |
2001.06.12 |
申请号 |
US19980192071 |
申请日期 |
1998.11.10 |
申请人 |
BATTELLE MEMORIAL INSTITUTE |
发明人 |
BRAY LANE A.;CORNEILLIE TODD M. |
分类号 |
C01F17/00;C22B59/00;G21G4/08;(IPC1-7):C01F17/00 |
主分类号 |
C01F17/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|