Patent US4602101A successfully refreshed from Google Patents.
US4602101A
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Method of manufacturing alkylhalosilanes
Assignee: Dow Silicones Corp
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Filing: 1985-11-12
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Granted: 1986-07-22
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Expires: 2005-11-12
Abstract
Abstract What is disclosed is a method of controlling a process for the preparation of alkylhalosilanes from silicon and alkylhalides where phosphorous or certain phosphorous compounds are used as promoters to enhance selectivity, overall yields of useable silanes and enhanced silicon metal conversion.
Inventors
- 👤 Roland L. Halm
- 👤 Oliver K. Wilding, Jr.
- 👤 Regie H. Zapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:32
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/16
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
95 words
A method for controlling a process for the manufacture of alkylhalosilanes said process comprising, contacting an alkylhalide with metallurgical grade silicon, at a temperature of 250° C. to 350° C., in the presence of tin or tin compounds, and copper or copper compounds, wherein there is at least also present, 25 to 2500 parts per million based on the silicon in the reacton mass, of a promoter selected from the group consisting essentially of (I) elemental phosphorous; (II) metal phosphides and, (III) compounds capable of forming metal phosphides in the reaction mass of the process.
Claim 2
Independent Claim
95 words
A method for controlling a process for the manufacture of alkylhalosilanes said process comprising, contacting an alkylhalide with metallurgical grade silicon, at a temperature of 250° C. to 350° C., in the presence of tin or tin compounds, and copper or copper compounds, wherein there is at least also present, 25 to 2500 parts per million based on the silicon in the reacton mass, of a promoter selected from the group consisting essentially of (I) elemental phosphorous; (II) metal phosphides and, (III) compounds capable of forming metal phosphides in the reaction mass of the process.
Claim 3
Dependent Claim
13 words
A method as claimed in claim 1 wherein the promoter is elemental phosphorous.
Claim 4
Dependent Claim
14 words
A method as claimed in claim 2 wherein the elemental phosphorous is white phosphorous.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 2 wherein the elemental phosphorous is black phosphorous.
Claim 6
Dependent Claim
14 words
A method as claimed in claim 2 wherein the elemental phosphorous is red phosphorous.
Claim 7
Dependent Claim
25 words
A method as claimed in claim 1 wherein the promoter is a compound capable of forming metal phosphides in the reaction mass of the process.
Claim 8
Dependent Claim
14 words
A method as claimed in claim 6 wherein the promoter is a phosphorous-copper alloy.
Claim 9
Dependent Claim
14 words
A method as claimed in claim 1 wherein the promoter is a metal phosphide.
Claim 10
Dependent Claim
14 words
A method as claimed in claim 8 wherein the metal phosphide is aluminum phosphide.
Claim 11
Dependent Claim
14 words
A method as claimed in claim 8 wherein the metal phosphide is calcium phosphide.
Claim 12
Dependent Claim
14 words
A method as claimed in claim 8 wherein the metal phosphide is copper phosphide.
Claim 13
Dependent Claim
14 words
A method as claimed in claim 8 wherein the metal phosphide is nickel phosphide.
Claim 14
Dependent Claim
14 words
A method as claimed in claim 8 wherein the metal phosphide is tin phosphide.
Claim 15
Dependent Claim
14 words
A method as claimed in claim 8 wherein the metal phosphide is zinc phosphide.
Claim 16
Dependent Claim
12 words
A method as claimed in claim 1 wherein the alkylhalide is methylchloride.
Claim 17
Dependent Claim
21 words
A method as claimed in claim 1 wherein the process is carried out under continuous conditions in a fluid bed reactor.
Claim 18
Dependent Claim
12 words
A method as claimed in claim 16 wherein the bed is vibrated.
Claim 19
Dependent Claim
18 words
A method as claimed in claim 1 wherein the process is carried out in a stirred bed reactor.
Claim 20
Dependent Claim
18 words
A method as claimed in claim 1 wherein the process is carried out in a fixed bed reactor.
Claim 21
Dependent Claim
17 words
A method as claimed in claim 1 wherein the process is carried out in a batch mode.
Claim 22
Dependent Claim
21 words
A method as claimed in claim 1 wherein there is present, in addition to tin, copper and the phosphorous promoter, zinc.
Claim 23
Dependent Claim
22 words
A method as claimed in claim 21 wherein there is present, in addition to tin, copper, zinc and the phosphorous promoter, aluminum.
Claim 24
Dependent Claim
23 words
A method as claimed in claim 22 wherein there is present, in addition to tin, copper, zinc, aluminum and the phosphorous promoter, iron.
Claim 25
Dependent Claim
39 words
A composition of matter comprising metallurgical grade silicon; copper or copper compounds; tin or tin compounds and, phosphorous selected from the group consisting essentially of (I) elemental phosphorous; (II) metal phosphides and, (III) compounds capable of forming metal phosphides.
Claim 26
Dependent Claim
39 words
A composition of matter comprising metallurgical grade silicon; copper or copper compounds; tin or tin compounds and, phosphorous selected from the group consisting essentially of (I) elemental phosphorous; (II) metal phosphides and, (III) compounds capable of forming metal phosphides.
Claim 27
Dependent Claim
57 words
A composition as claimed in claim 24 wherein there is present metallurgical grade silicon; 0.2 to 10 weight percent copper as copper; 10 to 200 parts per million of tin as tin, and, 25 to 2500 parts per million of phosphorous as phosphorous all weights and parts based on the amount of silicon present in the composition.
Claim 28
Dependent Claim
31 words
A composition as claimed in claim 25 wherein there is also present 100 to 10,000 parts per million zinc as zinc, based on the amount of silicon present in the composition.
Claim 29
Dependent Claim
29 words
A composition as claimed in claim 26 wherein there is also present 0.02 to 1 weight percent aluminum as aluminum, based on the amount of silicon in the composition.
Claim 30
Dependent Claim
31 words
A composition as claimed in claim 27 wherein there is also present up to 1 weight percent of iron as iron, based on the amount of silicon present in the composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |