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Title: Review of anhydrous zirconium-hafnium separation techniques. Information circular/1984

Abstract

Sixteen nonaqueous techniques conceived to replace the current aqueous scheme for separating hafnium and zirconium tetrachlorides were reviewed and evaluated by the Bureau of Mines. The methods are divided into two classes: separation by fractional volatilization of the tetrachlorides, which takes advantage of the higher volatility of hafnium tetrachloride; and separation by chemical techniques, based on differences in chemical behavior of the two tetrachlorides. The criteria used to evaluate separation methods were temperature, pressure, separation factor per equilibrium stage, complexity, compatibility with existing technology, and potential for continuous operation. Three processes were selected as being most promising: (1) high-pressure distillation, (2) extractive distillation from a molten salt, and (3) preferential reduction of gaseous ZrCl4. Any of the proposed nonaqueous Hf-Zr separation schemes must be supplemented with additional purification to remove trace impurities.

Authors:
; ;
Publication Date:
Research Org.:
Bureau of Mines, Albany, OR (USA). Albany Research Center
OSTI Identifier:
6943282
Alternate Identifier(s):
OSTI ID: 6943282
Report Number(s):
PB-84-152107
Resource Type:
Technical Report
Resource Relation:
Other Information: Library of Congress catalog card No. 83-20940
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; HAFNIUM; SEPARATION PROCESSES; ZIRCONIUM; DISTILLATION; EXTRACTIVE METALLURGY; LABORATORY EQUIPMENT; PURIFICATION; ELEMENTS; EQUIPMENT; METALLURGY; METALS; TRANSITION ELEMENTS 400105* -- Separation Procedures

Citation Formats

Skaggs, R.L., Rogers, D.T., and Hunter, D.B.. Review of anhydrous zirconium-hafnium separation techniques. Information circular/1984. United States: N. p., 1983. Web.
Skaggs, R.L., Rogers, D.T., & Hunter, D.B.. Review of anhydrous zirconium-hafnium separation techniques. Information circular/1984. United States.
Skaggs, R.L., Rogers, D.T., and Hunter, D.B.. Thu . "Review of anhydrous zirconium-hafnium separation techniques. Information circular/1984". United States.
@article{osti_6943282,
title = {Review of anhydrous zirconium-hafnium separation techniques. Information circular/1984},
author = {Skaggs, R.L. and Rogers, D.T. and Hunter, D.B.},
abstractNote = {Sixteen nonaqueous techniques conceived to replace the current aqueous scheme for separating hafnium and zirconium tetrachlorides were reviewed and evaluated by the Bureau of Mines. The methods are divided into two classes: separation by fractional volatilization of the tetrachlorides, which takes advantage of the higher volatility of hafnium tetrachloride; and separation by chemical techniques, based on differences in chemical behavior of the two tetrachlorides. The criteria used to evaluate separation methods were temperature, pressure, separation factor per equilibrium stage, complexity, compatibility with existing technology, and potential for continuous operation. Three processes were selected as being most promising: (1) high-pressure distillation, (2) extractive distillation from a molten salt, and (3) preferential reduction of gaseous ZrCl4. Any of the proposed nonaqueous Hf-Zr separation schemes must be supplemented with additional purification to remove trace impurities.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {12}
}

Technical Report:
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