Abstract: A process for extracting technetium values from an aqueous alkaline solution containing at least one alkali metal hydroxide and at least one alkali metal nitrate, the at least one alkali metal nitrate having a concentration of from about 0.1 to 6 molar. The solution is contacted with a solvent consisting of a crown ether in a diluent for a period of time sufficient to selectively extract the technetium values from the aqueous alkaline solution. The solvent containing the technetium values is separated from the aqueous alkaline solution and the technetium values are stripped from the solvent.
Type:
Grant
Filed:
July 21, 1994
Date of Patent:
August 22, 1995
Assignee:
The United States of America as represented by the United States Department of Energy
Inventors:
Bruce A. Moyer, Richard A. Sachleben, Peter V. Bonnesen
Abstract: A method for in situ characterization of a medium of a dispersed phase in a continuous phase, including the steps of adding a fluorescent dye to one phase capable of producing fluorescence therein when the fluorescent dye is optically excited, optically exciting the fluorescent dye at a wavelength to produce fluorescence in the one phase, and monitoring the fluorescence to distinguish the continuous phase from the dispersed phase.
Type:
Grant
Filed:
July 27, 1993
Date of Patent:
March 7, 1995
Assignee:
The United States of America as represented by the United States Department of Energy
Abstract: A cermet crucible for metallurgically processing metals having high melting points comprising a body consisting essentially of a mixture of calcium oxide and erbium metal, the mixture comprising calcium oxide in a range between about 50 and 90% by weight and erbium metal in a range between about 10 and 50% by weight.
Type:
Grant
Filed:
January 25, 1994
Date of Patent:
February 14, 1995
Assignee:
The United States of America as represented by the United States Department of Energy
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