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Title: PROCESS OF REDUCING PLUTONIUM TO TETRAVALENT TRIVALENT STATE

Abstract

The reduction of hexavalent and tetravalert plutonium ions to the trivalent state in strong nitric acid can be accomplished with hydrogen peroxide. The trivalent state may be stabilized as a precipitate by including oxalate or fluoride ions in the solution. The acid should be strong to encourage the reduction from the plutonyl to the trivalent state (and discourage the opposed oxidation reaction) and prevent the precipitation of plutonium peroxide, although the latter may be digested by increasing the acid concentration. Although excess hydrogen peroxide will oxidize plutonlum to the plutonyl state, complete reduction is insured by gently warming the solution to break down such excess H/ sub 2/O/sub 2/. The particular advantage of hydrogen peroxide as a reductant lies in the precipitation technique, where it introduces no contaminating ions. The process is adaptable to separate plutonium from uranium and impurities by proper adjustment of the sequence of insoluble anion additions and the hydrogen peroxide addition.

Inventors:
Issue Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4178299
Patent Number(s):
2936213 #
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-14-021485
NSA Number:
NSA-14-021485
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
CHEMISTRY; FLUORIDES; HYDROGEN PEROXIDES; IMPURITIES; IONS; NITRIC ACID; PLUTONIUM; PRECIPITATION; REDUCTION; SEPARATION PROCESSES; URANIUM

Citation Formats

Mastick, D.F. PROCESS OF REDUCING PLUTONIUM TO TETRAVALENT TRIVALENT STATE. United States: N. p., 1960. Web.
Mastick, D.F. PROCESS OF REDUCING PLUTONIUM TO TETRAVALENT TRIVALENT STATE. United States.
Mastick, D.F. Tue . "PROCESS OF REDUCING PLUTONIUM TO TETRAVALENT TRIVALENT STATE". United States.
@article{osti_4178299,
title = {PROCESS OF REDUCING PLUTONIUM TO TETRAVALENT TRIVALENT STATE},
author = {Mastick, D.F.},
abstractNote = {The reduction of hexavalent and tetravalert plutonium ions to the trivalent state in strong nitric acid can be accomplished with hydrogen peroxide. The trivalent state may be stabilized as a precipitate by including oxalate or fluoride ions in the solution. The acid should be strong to encourage the reduction from the plutonyl to the trivalent state (and discourage the opposed oxidation reaction) and prevent the precipitation of plutonium peroxide, although the latter may be digested by increasing the acid concentration. Although excess hydrogen peroxide will oxidize plutonlum to the plutonyl state, complete reduction is insured by gently warming the solution to break down such excess H/ sub 2/O/sub 2/. The particular advantage of hydrogen peroxide as a reductant lies in the precipitation technique, where it introduces no contaminating ions. The process is adaptable to separate plutonium from uranium and impurities by proper adjustment of the sequence of insoluble anion additions and the hydrogen peroxide addition.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1960},
month = {5}
}