Method of separating and purifying gadolinium-153
Abstract
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).
- Inventors:
-
- Richland, WA
- Davis, CA
- Issue Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 873778
- Patent Number(s):
- 6245305
- Application Number:
- 09/192,071
- Assignee:
- Battelle Memorial Institute (Richland, WA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; separating; purifying; gadolinium-153; improvement; gadolinium; mixture; europium; steps; dissolving; acid; reducing; precipitating; sulfate; superstoichiometric; amount; achieved; following; anoic; ii; zinc; metal; absence; ineffective; iii; adding; iia; element; step; excess; prior; repeating; salt; monovalent; cation; cold; stoichiometric amount; sulfate prior; sulfate salt; repeating step; monovalent cation; anoic acid; purifying gadolinium; /423/
Citation Formats
Bray, Lane A, and Corneillie, Todd M. Method of separating and purifying gadolinium-153. United States: N. p., 2001.
Web.
Bray, Lane A, & Corneillie, Todd M. Method of separating and purifying gadolinium-153. United States.
Bray, Lane A, and Corneillie, Todd M. Mon .
"Method of separating and purifying gadolinium-153". United States. https://www.osti.gov/servlets/purl/873778.
@article{osti_873778,
title = {Method of separating and purifying gadolinium-153},
author = {Bray, Lane A and Corneillie, Todd M},
abstractNote = {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).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}
Works referenced in this record:
The Separation of Europium from Other rare Earths
journal, September 1935
- McCoy, Herbert N.
- Journal of the American Chemical Society, Vol. 57, Issue 9
142. Rare-earth metal amalgams. Part IV. The isolation of europium
journal, January 1943
- Marsh, Joseph K.
- Journal of the Chemical Society (Resumed)
Preparation of high-purity europium oxide using combined reduction-ion exchange method
journal, October 1985
- Elbanowski, M.; Baranowska, J.
- Journal of the Less Common Metals, Vol. 112, Issue 1-2