Patent US4374111A successfully refreshed from Google Patents.
US4374111A
Expired / Lapsed
US
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Production of silane
Assignee: Honeywell International Inc
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Filing: 1980-11-21
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Granted: 1983-02-15
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Expires: 2000-11-21
Abstract
Abstract A silicon halide such as silicon tetrafluoride is reacted with an agitated slurry of an alkali metal hydride such as sodium hydride in a liquid which includes a diaryl ether such as diphenyl ether. At elevated temperatures such as 250 DEG -260 DEG C., complete conversion of the silicon tetrahalide to silane is observed, even with contact times under two seconds.
Inventors
- 👤 Philip A. Lefrancois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:13
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/04; C01B33/043
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
A process which comprises reacting a silicon halide with an agitated slurry of an alkali metal hydride in a liquid comprising at least about 50% by weight of a diaryl ether at a temperature between about 225° C. and the boiling point of the diaryl ether at the reaction pressure to effect formation of silane and the corresponding alkali metal halide.
Claim 2
Dependent Claim
61 words
A process which comprises reacting a silicon halide with an agitated slurry of an alkali metal hydride in a liquid comprising at least about 50% by weight of a diaryl ether at a temperature between about 225° C. and the boiling point of the diaryl ether at the reaction pressure to effect formation of silane and the corresponding alkali metal halide.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the alkali metal hydride is sodium hydride.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the silicon halide is silicon tetrafluoride.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the silicon halide is silicon tetrachloride.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein the silicon halide is trichlorosilane.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the diaryl ether is diphenyl ether.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein the alkali metal hydride is sodium hydride, the silicon halide is silicon tetrafluoride and the diaryl ether is diphenyl ether.
Claim 9
Dependent Claim
22 words
The process of claim 1 or 3 or 7 wherein the reaction temperature is between about 240° C. and about 260° C.
Claim 10
Dependent Claim
22 words
The process of claim 1 or 3 or 7 wherein the reaction temperature is between about 250° C. and about 260° C.
Claim 11
Dependent Claim
21 words
The process of claim 1 wherein the silicon halide is fed as a mixture with a diluent into the agitated slurry.
Claim 12
Dependent Claim
10 words
The process of claim 10 wherein the diluent is nitrogen.
Claim 13
Dependent Claim
10 words
The process of claim 10 wherein the diluent is hydrogen.
Claim 14
Dependent Claim
27 words
The process of claim 6 or 7 wherein the liquid is between about 50% and about 95% diphenyl ether and between about 5% and about 50% biphenyl.
References Cited (Backward Citations)
US3043664A
Cited
US3050366A
Cited
GB909950A
Cited
US3419354A
Cited
US3607896A
Cited
US3926833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |