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US 7,582,788 B2Granted
Process for preparation of alkoxysilanes
AssigneeRoston Family LLC.
InventorsWilliam A. Roston, Robert D. Cody, Matthew Daniel Bowman
Life of this patent
Estimating the term…
Abstract
Alkoxysilanes are prepared by a process which uses microwave or RF energy. Thus, silicon metal and a copper catalyst are exposed to microwave radiation in the presence of an appropriate hydroxy compound, such as, an alcohol, and a catalyst, to yield the corresponding trialkoxysilane. The desired alkoxysilanes are prepared with high selectivity and at lower temperatures and shorter times than traditional approaches allow.
Claims30
A process for preparation of an alkoxysilane represented by the formula:
- HnSi(OR)4-n
- wherein n is from 0 to about 2;
- and wherein each R is independently selected from the group consisting of:
- a linear, branched or cyclic alkyl of having 1 to 12 carbon atoms, aryl, and acyl, wherein at least one of said alkyl, aryl and acyl groups is optionally substituted by at least one alkyl, alkoxy, halo, cyano or aryl;
- said process comprising the step of:
- contacting elemental silicon and an hydroxy compound represented by the formula:
- ROH
- wherein R is selected from the group consisting of:
- a linear, branched or cyclic alkyl having 1 to 12 carbon atoms, aryl, and acyl, wherein at least one of said alkyl, aryl and acyl groups is optionally substituted by at least one alkyl, alkoxy, halo, cyano or aryl;
- wherein said contacting is carried out in the presence of at least one catalyst selected from the group consisting of:
- copper, zinc, and nickel;
- and a non-ionizing radiation selected from the group consisting of:
- microwave, radio frequency (RF), and a combination thereof, and at a temperature, pressure, and time sufficient to form said alkoxysilane.
10 more elements
A process for preparation of an alkoxysilane represented by the formula:
- HnSi(OR)4-n
- wherein n is from 0 to about 2;
- and wherein each R is independently selected from the group consisting of:
- a linear, branched or cyclic alkyl of having 1 to 12 carbon atoms, aryl, and acyl, wherein at least one of said alkyl, aryl and acyl groups is optionally substituted by at least one alkyl, alkoxy, halo, cyano or aryl;
- said process comprising the steps of:
- forming a slurry comprising elemental silicon and at least one catalyst selected from the group consisting of:
- copper, zinc, and nickel;
- exposing said slurry to a non-ionizing radiation selected from the group consisting of:
- microwave, radio frequency (RF), and a combination thereof to until said slurry reaches a first temperature;
- continuing to expose said slurry to said non-ionizing radiation while contacting said slurry with an hydroxy compound represented by the formula:
- ROH
- wherein R is selected from the group consisting of:
- a linear, branched or cyclic alkyl having 1 to 12 carbon atoms, aryl, and acyl, wherein at least one of said alkyl, aryl and acyl groups is optionally substituted by at least one alkyl, alkoxy, halo, cyano or aryl to form said alkoxysilane.
10 more elements
Dependencies are inferred from the claim text.