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US 7,494,527 B2Granted
Process for plasma synthesis of rhenium nano and micro powders, and for coatings and near net shape deposits thereof and apparatus therefor
AssigneeTekna Plasma Systems Inc.
InventorsJerzy W. Jurewicz, Jiayin Guo
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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: 2 NH4ReO4+4 H2→2 Re+N2↑+8 H2O↑. The reactor is provided with a quench zone for cooling the metallic rhenium so as to yield rhenium nano and micro powders.
Claims9
A process for the synthesis of rhenium powders comprising:
- injecting 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 gaseous metallic rhenium under the following chemical reaction:
- 2 NH4ReO4+4 H2→2 Re↑+N2↑+8 H2O↑;
- and
- quenching said gaseous metallic rhenium, yielding rhenium powders,
- wherein about 2 moles of hydrogen gas (H2) are provided for each mole of ammonium perrhenate (NH4ReO4).
2 more elements
Dependencies are inferred from the claim text.