Stabilization of amine alanes
AssigneeEthyl Corporation
InventorsEverett M. Marlett, Frederick W. Frey, Steven W. Johnston, Herbert D. Kaesz
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Abstract
Amine alane decomposition is catalyzed by titanium. This effect of titanium can be suppressed by treating it with a passivating agent such as air, nitrous oxide, carbon monoxide and alkyl nitrites. Such agents may be used (1) to treat titanium-containing NaAlH.sub.4 preparations to be used in preparing amine alanes, or (2) to treat amine alanes containing titanium as an impurity, e.g. in finely divided form. Furthermore, the reaction of NaAlH.sub.4, amine, and a halide substance to produce an amine alane can be conducted in the presence of a passivating agent.
Claims11
Process for reducing the rate of amine alane decomposition catalyzed by titanium, said process comprising treating titanium that is in contact with an amine alane with a passivating amount of a passivating agent selected from the class consisting of O.sub.2, CO, nitrogen oxides, and alkyl nitrites.
Process for reducing the rate of amine alane decomposition catalyzed by titanium, said process comprising treating a titanium-containing sodium aluminum tetrahydride with a passivating amount of O.sub.2, CO, a nitrogen oxide or alkyl nitrite, and subsequently reacting the passivated NaAlH.sub.4 thereby produced to prepare an amine alane.
Process for reducing the rate of amine alane decomposition catalyzed by titanium, said process comprising treating a titanium-containing sodium aluminum tetrahydride with a passivating amount of air, and subsequently reacting the passivated NaAlH.sub.4 thereby produced to prepare an amine alane.
Process for producing an amine alane product of enhanced stability, said process comprising reacting in the presence of titanium, sodium aluminum tetrahydride, an aluminum halide, and a complexing tertiary amine, while adding to the reaction zone a titanium-passivating amount of a passivating agent selected from O.sub.2, air, CO, nitrogen oxides, and alkyl nitrites.
Dependencies are inferred from the claim text.