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Title: Hafnium radioisotope recovery from irradiated tantalum

Abstract

Hafnium is recovered from irradiated tantalum by: (a) contacting the irradiated tantalum with at least one acid to obtain a solution of dissolved tantalum; (b) combining an aqueous solution of a calcium compound with the solution of dissolved tantalum to obtain a third combined solution; (c) precipitating hafnium, lanthanide, and insoluble calcium complexes from the third combined solution to obtain a first precipitate; (d) contacting the first precipitate of hafnium, lanthanide and calcium complexes with at least one fluoride ion complexing agent to form a fourth solution; (e) selectively adsorbing lanthanides and calcium from the fourth solution by cationic exchange; (f) separating fluoride ion complexing agent product from hafnium in the fourth solution by adding an aqueous solution of ferric chloride to obtain a second precipitate containing the hafnium and iron; (g) dissolving the second precipitate containing the hafnium and iron in acid to obtain an acid solution of hafnium and iron; (h) selectively adsorbing the iron from the acid solution of hafnium and iron by anionic exchange; (i) drying the ion exchanged hafnium solution to obtain hafnium isotopes. Additionally, if needed to remove residue remaining after the product is dried, dissolution in acid followed by cation exchange, then anionmore » exchange, is performed.« less

Inventors:
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
873661
Patent Number(s):
6214301
Assignee:
Regents of University of California (Los Alamos, NM) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hafnium; radioisotope; recovery; irradiated; tantalum; recovered; contacting; acid; obtain; solution; dissolved; combining; aqueous; calcium; compound; third; combined; precipitating; lanthanide; insoluble; complexes; precipitate; fluoride; complexing; agent; form; fourth; selectively; adsorbing; lanthanides; cationic; exchange; separating; product; adding; ferric; chloride; containing; iron; dissolving; anionic; drying; exchanged; isotopes; additionally; remove; residue; remaining; dried; dissolution; followed; cation; anion; performed; cationic exchange; combined solution; cation exchange; anion exchange; acid solution; aqueous solution; complexing agent; calcium compound; irradiated tantalum; combined sol; /423/

Citation Formats

Taylor, Wayne A., and Jamriska, David J. Hafnium radioisotope recovery from irradiated tantalum. United States: N. p., 2001. Web.
Taylor, Wayne A., & Jamriska, David J. Hafnium radioisotope recovery from irradiated tantalum. United States.
Taylor, Wayne A., and Jamriska, David J. Mon . "Hafnium radioisotope recovery from irradiated tantalum". United States. https://www.osti.gov/servlets/purl/873661.
@article{osti_873661,
title = {Hafnium radioisotope recovery from irradiated tantalum},
author = {Taylor, Wayne A. and Jamriska, David J.},
abstractNote = {Hafnium is recovered from irradiated tantalum by: (a) contacting the irradiated tantalum with at least one acid to obtain a solution of dissolved tantalum; (b) combining an aqueous solution of a calcium compound with the solution of dissolved tantalum to obtain a third combined solution; (c) precipitating hafnium, lanthanide, and insoluble calcium complexes from the third combined solution to obtain a first precipitate; (d) contacting the first precipitate of hafnium, lanthanide and calcium complexes with at least one fluoride ion complexing agent to form a fourth solution; (e) selectively adsorbing lanthanides and calcium from the fourth solution by cationic exchange; (f) separating fluoride ion complexing agent product from hafnium in the fourth solution by adding an aqueous solution of ferric chloride to obtain a second precipitate containing the hafnium and iron; (g) dissolving the second precipitate containing the hafnium and iron in acid to obtain an acid solution of hafnium and iron; (h) selectively adsorbing the iron from the acid solution of hafnium and iron by anionic exchange; (i) drying the ion exchanged hafnium solution to obtain hafnium isotopes. Additionally, if needed to remove residue remaining after the product is dried, dissolution in acid followed by cation exchange, then anion exchange, is performed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

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