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Title: Bidentate organophosphorus solvent extraction process for actinide recovery and partition

Abstract

A liquid-liquid extraction process for the recovery and partitioning of actinide values from acidic nuclear waste aqueous solutions, the actinide values including trivalent, tetravalent and hexavalent oxidation states is provided and includes the steps of contacting the aqueous solution with a bidentate organophosphorous extractant to extract essentially all of the actinide values into the organic phase. Thereafter the respective actinide fractions are selectively partitioned into separate aqueous solutions by contact with dilute nitric or nitric-hydrofluoric acid solutions. The hexavalent uranium is finally removed from the organic phase by contact with a dilute sodium carbonate solution.

Inventors:
 [1]
  1. Richland, WA
Issue Date:
Research Org.:
Atlantic Richfield Hanford Co., Richland, WA (USA)
OSTI Identifier:
862709
Patent Number(s):
3993728
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
DOE Contract Number:  
AT(45-1)-2130
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
bidentate; organophosphorus; solvent; extraction; process; actinide; recovery; partition; liquid-liquid; partitioning; values; acidic; nuclear; waste; aqueous; solutions; including; trivalent; tetravalent; hexavalent; oxidation; provided; steps; contacting; solution; organophosphorous; extractant; extract; essentially; organic; phase; thereafter; respective; fractions; selectively; partitioned; separate; contact; dilute; nitric; nitric-hydrofluoric; acid; uranium; finally; removed; sodium; carbonate; hydrofluoric acid; acid solutions; extraction process; actinide values; sodium carbonate; acid solution; solvent extraction; organic phase; aqueous solution; aqueous solutions; nuclear waste; carbonate solution; bidentate organophosphorus; bidentate organophosphorous; acidic nuclear; liquid extract; organophosphorous extractant; solvent extract; liquid extraction; actinide recovery; dilute nitric; liquid-liquid extraction; /423/

Citation Formats

Schulz, Wallace W. Bidentate organophosphorus solvent extraction process for actinide recovery and partition. United States: N. p., 1976. Web.
Schulz, Wallace W. Bidentate organophosphorus solvent extraction process for actinide recovery and partition. United States.
Schulz, Wallace W. Thu . "Bidentate organophosphorus solvent extraction process for actinide recovery and partition". United States. https://www.osti.gov/servlets/purl/862709.
@article{osti_862709,
title = {Bidentate organophosphorus solvent extraction process for actinide recovery and partition},
author = {Schulz, Wallace W},
abstractNote = {A liquid-liquid extraction process for the recovery and partitioning of actinide values from acidic nuclear waste aqueous solutions, the actinide values including trivalent, tetravalent and hexavalent oxidation states is provided and includes the steps of contacting the aqueous solution with a bidentate organophosphorous extractant to extract essentially all of the actinide values into the organic phase. Thereafter the respective actinide fractions are selectively partitioned into separate aqueous solutions by contact with dilute nitric or nitric-hydrofluoric acid solutions. The hexavalent uranium is finally removed from the organic phase by contact with a dilute sodium carbonate solution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {1}
}

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