Process for plasma synthesis of rhenium nano and micro...

Details Process for plasma synthesis of rhenium nano and micro... Process for plasma synthesis of rhenium nano and micro...

2005-01-25

2009-02-24

Wyszomierski, George (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

C977S896000

Reexamination Certificate

active

07494527

ABSTRACT:
The process for the synthesis of rhenium powders comprises the injection of ammonium perrhenate powder through a carrier gas in a plasma torch of a plasma reactor operated using a mixture including hydrogen as the plasma gas, yielding metallic rhenium under the following chemical reaction:in-line-formulae description="In-line Formulae" end="lead"?2 NH4ReO4+4 H2→2 Re+N2↑+8 H2O↑.in-line-formulae description="In-line Formulae" end="tail"?The reactor is provided with a quench zone for cooling the metallic rhenium so as to yield rhenium nano and micro powders.

REFERENCES:
patent: 3475158 (1969-10-01), Neuenschwander
patent: 6551377 (2003-04-01), Leonhardt
patent: 2048279 (1995-11-01), None
Tribalat S. Rhénium et technetium, Gauthier-Villars, Paris, 1957.
Davenport, William H., et al., “Rhenium Chemicals—Their Properties and Applications,” Cleveland Refractory Metals (Division, Chase Brass & Copper Co.), 1969.
Jungfleisch, M.L., et al., “Monographies sur les Métaux de Haute Pureté,” Masson et Cie, Éditeurs, 1972.

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