Preparation of silane and amine alanes

Details Preparation of silane and amine alanes Preparation of silane and amine alanes

C - Chemistry, Metallurgy

01

B

23/196, 260/433,

C01B 33/04 (2006.01) C01F 7/50 (2006.01) C07F 5/06 (2006.01)

Patent

CA 1271617

ABSTRACT PREPARATION OF SILANE AND AMINE ALANES Process for the preparation of silane and a ter- tiary amine alane, said process comprising reacting: (a) an alkali metal tetrahydride having the for- mula MAlH4, wherein M is an alkali metal selected from the class consisting of lithium, sodium and potassium, (b) silicon tetrachloride, and (c) a complexing tertiary amine, such that the molar proportion of (a) to (b) to (c) is 4:1:4. In this process, NaAlH4 and triethylamine are pre- ferred reactants. The amine alane product can be reacted with additional silicon halide to prepare additional silane. This step can be conducted utilizing amine alane in the reaction mixture produced by the process above, and is preferably con- ducted using SiF4 as the silicon tetrahalide to produce AlF3 as a co-product. Both AlF3 and silane are valuable articles of commerce.

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