Acidic halide neutralization in alkoxysilanes
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsJames S. Ritscher, Scot M. Turner
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Abstract
A method for reducing the level of acidic halide contamination in alkoxysilanes by contacting the silane with a stoichiometric excess of (i) a basic reagent, such as in particular, a metal alkoxide and (ii) an acid salt.
Claims14
A process for removing acidic halide contained in an alkoxysilane which comprises contacting said alkoxysilane under substantially anhydrous conditions with (i) a base in a stoichiometric excess based on the level of said acidic halide, and (ii) a stoichiometric excess of an acid salt based on the level of residual excess base contained in the alkoxysilane.
A process for removing acidic halide contained in an alkoxysilane which comprises contacting said alkoxysilane under substantially anhydrous conditions with:
- a) a metal alkoxide selected from at least one member of the group consisting of sodium methoxide, sodium ethoxide, potassium methoxide, and potassium ethoxide, in a 0.1 to 200% excess of the amount of metal alkoxide required to substantially neutralize the acidic halide content of the alkoxysilane;
- and
- b) a stoichiometric excess of at least one member of an acid salt selected from the group consisting of sodium hydrogen phosphate, potassium hydrogen phosphate, sodium dihydrogen phosphate and potassium dihydrogen phosphate based on the level of residual excess metal alkoxide.
Dependencies are inferred from the claim text.