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Title: URANIUM DECONTAMINATION

Abstract

A process is described for reducing the extractability of ruthenium, zirconium, and niobium values into hexone contained in an aqueous nitric acid uranium-containing solution. The solution is made acid-deficient, heated to between 55 and 70 deg C, and at that temperature a water-soluble inorganic thiosulfate is added. By this, a precipitate is formed which carries the bulk of the ruthenium, and the remainder of the ruthenium as well as the zirconium and niobium are converted to a hexone-nonextractable form. The rutheniumcontaining precipitate can either be removed from the solu tion or it can be dissolved as a hexone-non-extractable compound by the addition of sodium dichromate prior to hexone extraction.

Inventors:
;
Issue Date:
OSTI Identifier:
4187031
Patent Number(s):
2918350
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
NSA Number:
NSA-14-007482
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
CHEMISTRY; CHROMATES; DECONTAMINATION; HEATING; HEXANE; KETONES; NIOBIUM; NITRIC ACID; PRECIPITATION; RUTHENIUM; SODIUM COMPOUNDS; SOLUBILITY; SOLUTIONS; SOLVENT EXTRACTION; SULFATES; TEMPERATURE; THIOSULFATES; URANIUM; WATER; ZIRCONIUM

Citation Formats

Buckingham, J S, and Carroll, J L. URANIUM DECONTAMINATION. United States: N. p., 1959. Web.
Buckingham, J S, & Carroll, J L. URANIUM DECONTAMINATION. United States.
Buckingham, J S, and Carroll, J L. Tue . "URANIUM DECONTAMINATION". United States.
@article{osti_4187031,
title = {URANIUM DECONTAMINATION},
author = {Buckingham, J S and Carroll, J L},
abstractNote = {A process is described for reducing the extractability of ruthenium, zirconium, and niobium values into hexone contained in an aqueous nitric acid uranium-containing solution. The solution is made acid-deficient, heated to between 55 and 70 deg C, and at that temperature a water-soluble inorganic thiosulfate is added. By this, a precipitate is formed which carries the bulk of the ruthenium, and the remainder of the ruthenium as well as the zirconium and niobium are converted to a hexone-nonextractable form. The rutheniumcontaining precipitate can either be removed from the solu tion or it can be dissolved as a hexone-non-extractable compound by the addition of sodium dichromate prior to hexone extraction.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {12}
}