Method for preparing ultra-pure zirconium and hafnium tetrafluorides

Patent · Tue Mar 25 00:00:00 EST 1986

OSTI ID:5771904

Pastor, R C; Robinson, M

A method is described for separating iron impurities from an impure metal halide in which the impure metal halide is heated to a temperature sufficient to form a metal halide vapor, the vapor being separated from the impure metal halide and condensed to form purified metal halide having a reduced iron contant. The improvement described here consists of: utilizing electromotive series displacement by contacting a melt containing the impure metal halide with a pure metal, the electromotive series displacement causing the plating out of 3d metal impurities.

• Assignee: Hughes Aircraft Co., El Segundo, CA
• Patent Number(s): US 4578252
• OSTI ID: 5771904
• Resource Relation: Patent File Date: Filed date 14 May 1985
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HAFNIUM FLUORIDES
PURIFICATION
ZIRCONIUM FLUORIDES
ELECTROMOTIVE FORCE
ELECTROPLATING
HEATING
IMPURITIES
IRON
TEMPERATURE DEPENDENCE
VAPOR CONDENSATION
VAPORS
DEPOSITION
ELECTRODEPOSITION
ELECTROLYSIS
ELEMENTS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HAFNIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LYSIS
METALS
PLATING
REFRACTORY METAL COMPOUNDS
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
400201* - Chemical & Physicochemical Properties