METHOD OF PRODUCING HAFNIUM-FREE "CRYSTAL-BAR" ZIRCONIUM FROM A CRUDE SOURCE OF ZIRCONIUM

Patent · Fri May 01 04:00:00 EDT 1959

OSTI ID:4233817

Newnham, I E

Production of Hf-free crystal-bar Zr is described. The crude source of Zr is carbided with carbon in a graphite resistance furnace, then treated with iodide to form ZrI/sub 4/. The ZrI/sub 4/ plus iodide impurities is heated with Zr powder in an evacuated vessel to 500 C. This causes ZrI/sub 3/ to form and be separated from the more volatile HfI/sub 4/ and AlI/sub 3/ which deposit on the condenserlid. The ZrI/sub 3/ is further separated from iodides of Fe, and V by heating to 350 C to re-form ZrI/sub 4/. The morevolatile ZrI/sub 4/ then is collected in pure form on another condenser-lid from which it can be removed and reduced to Zr. (T.R.H.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-13-021255
• Assignee: Mallory-Sharon Metals Corp.
• Patent Number(s): US 2885281
• OSTI ID: 4233817
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM IODIDES
CONDENSERS
CRYSTALS
DISTILLATION
ELECTRIC CONDUCTIVITY
FURNACES
GRAPHITE
HAFNIUM
HAFNIUM IODIDES
HEATING
IMPURITIES
IODIDES
IRON IODIDES
LIQUEFYING
METALLURGY AND CERAMICS
POWDERS
PRODUCTION
REDUCTION
RODS
SEPARATION PROCESSES
TEMPERATURE
VACUUM
VANADIUM IODIDES
VESSELS
VOLATILITY
ZIRCONIUM
ZIRCONIUM CARBIDES
ZIRCONIUM IODIDES