Catalyst for hydrazine decomposition and the method of producing

Details Catalyst for hydrazine decomposition and the method of producing Catalyst for hydrazine decomposition and the method of producing

1970-10-20

1982-04-13

Nelson, Peter A.

Coating processes

Nonuniform coating

Crystalization or precipitation coating

4274431, 199 36, 264 3E, B05D 500

Patent

active

043248195

ABSTRACT:
A catalyst is provided for decomposing hydrazine base monopropellants and providing multiple hydrazine-ignition restarts. The catalyst comprises a carrier material selected from the group consisting of high area ceramics, and 1/2 to 8% of active iridium, ruthenium, or mixtures thereof, based on the total weight of the catalyst. The active metal is deposited primarily on the exterior surface of the carrier. A second metal catalyst can be contained primarily within the interior of the carrier.
The method of producing the catalyst comprises impregnating the carrier with an alcohol solution containing a salt of iridium, ruthenium, or a mixture thereof, to deposit the metal on the exterior surface only of the carrier. The precious metal is reduced to an active pure metal by contact with a fluid reducing agent selected from the group consisting of hydrogen and hydrogen-inert gas mixtures. A second metal catalyst can be deposited uniformly throughout the catalyst by impregnating the carrier with an aqueous solution containing a compound of the second metal catalyst.

REFERENCES:
patent: 3366705 (1968-01-01), Giannetti
patent: 3608313 (1971-09-01), Guth
patent: 3644198 (1972-02-01), Wilhelm
patent: 3660310 (1972-05-01), Kluksdahl

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