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US4088669A
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Method for preparing organosilicon compounds from elemental silicon and hydrocarbon ethers
Assignee: Dow Silicones Corp
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Filing: 1977-04-08
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Granted: 1978-05-09
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Expires: 1997-04-08
Abstract
Abstract Organosilicon compounds bearing silicon-bonded hydrocarbon radicals and silicon-bonded hydrocarbonoxy radicals are obtained by contacting activated silicon, a hydrocarbon ether and a halogen-containing catalyst in a closed system at elevated temperature. Silanes and siloxanes, particularly methylmethoxysilanes, may be prepared and used to prepare valuable silicone materials.
Inventors
- 👤 James R. Malek
- 👤 John L. Speier
- 👤 Antony P. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:50
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/1872; C07F7/188; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0874
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
80 words
A method for preparing organosilicon compounds, said method comprising contacting components consisting essentially of (a) activated silicon (b) a hydrocarbon ether wherein at least one oxygen-bonded carbon atom is an aliphatic carbon atom, and (c) a catalytic amount of a halogen-containing catalyst, said contacting being done in a closed container at a temperature of at least approximately 200° C., thereby producing at least one organosilicon compound bearing at least one silicon-bonded hydrocarbon radical and at least one silicon-bonded hydrocarbonoxy radical.
Claim 2
Independent Claim
80 words
A method for preparing organosilicon compounds, said method comprising contacting components consisting essentially of (a) activated silicon (b) a hydrocarbon ether wherein at least one oxygen-bonded carbon atom is an aliphatic carbon atom, and (c) a catalytic amount of a halogen-containing catalyst, said contacting being done in a closed container at a temperature of at least approximately 200° C., thereby producing at least one organosilicon compound bearing at least one silicon-bonded hydrocarbon radical and at least one silicon-bonded hydrocarbonoxy radical.
Claim 3
Dependent Claim
29 words
A method according to claim 1 wherein the molar parts of the hydrocarbon ether is greater than the atom parts of silicon in the activated silicon during said contacting.
Claim 4
Dependent Claim
26 words
A method according to claim 2 wherein the contacting is done at autogenous pressure and at a temperature of from approximately 200° to approximately 300° C.
Claim 5
Dependent Claim
17 words
A method according to claim 3 wherein at least one organosilicon compound is recovered after said contacting.
Claim 6
Dependent Claim
15 words
A method according to claim 4 wherein an inert liquid is present during said contacting.
Claim 7
Dependent Claim
32 words
A method according to claim 1 wherein the silicon is activated with copper and at least one other element selected from the group consisting of Group IB and IIB periodic chart elements.
Claim 8
Dependent Claim
15 words
A method according to claim 6 wherein the silicon is activated with copper and tin.
Claim 9
Dependent Claim
16 words
A method according to claim 7 wherein the silicon is activated with copper, tin, and mercury.
Claim 10
Dependent Claim
38 words
A method according to claim 8 wherein the hydrocarbon ether is dimethyl ether or diethyl ether, the molar parts of said hydrocarbon ether being greater than the atom parts of silicon in said activated silicon during said contacting.
Claim 11
Dependent Claim
26 words
A method according to claim 9 wherein the contacting is done at autogeneous pressure and at a temperature of from approximately 200° to approximately 300° C.
Claim 12
Dependent Claim
17 words
A method according to claim 10 wherein at least one organosilicon compound is recovered after said contacting.
Claim 13
Dependent Claim
15 words
A method according to claim 11 wherein an inert liquid is present during said contacting.
Claim 14
Dependent Claim
30 words
A method according to claim 1 wherein the hydrocarbon ether has the formula ROR, wherein R denotes a monovalent hydrocarbon radical having from 1 to 10 carbon atoms, both inclusive.
Claim 15
Dependent Claim
16 words
A method according to claim 13 wherein the hydrocarbon ether is dimethyl ether or diethyl ether.
Claim 16
Dependent Claim
28 words
A method according to claim 14 wherein the molar parts of hydrocarbon ether is greater than the atom parts of silicon in the activated silicon during said contacting.
Claim 17
Dependent Claim
26 words
A method according to claim 15 wherein the contacting is done at autogeneous pressure and at a temperature of from approximately 200° to approximately 300° C.
Claim 18
Dependent Claim
17 words
A method according to claim 16 wherein at least one organosilicon compound is recovered after said contacting.
Claim 19
Dependent Claim
15 words
A method according to claim 17 wherein an inert liquid is present during said contacting.
Claim 20
Dependent Claim
14 words
A method according to claim 1 wherein the halogen-containing catalyst is a bromine-containing catalyst.
Claim 21
Dependent Claim
14 words
A method according to claim 19 wherein the bromine-containing catalyst is an aliphatic bromide.
Claim 22
Dependent Claim
44 words
A method according to claim 20 wherein the hydrocarbon ether is dimethyl ether or diethyl ether and the catalyst is methyl bromide, the molar parts of said hydrocarbon ether being greater than the atom parts of silicon in said activated silicon during said contacting.
Claim 23
Dependent Claim
26 words
A method according to claim 21 wherein said contacting is done at autogeneous pressure and at a temperature of from approximately 200° to approximately 300° C.
Claim 24
Dependent Claim
17 words
A method according to claim 22 wherein at least one organosilicon compound is recovered after said contacting.
Claim 25
Dependent Claim
15 words
A method according to claim 23 wherein an inert liquid is present during said contacting.
Claim 26
Dependent Claim
80 words
A method according to claim 1 wherein the organosilicon compound has the average unit formula ##EQU4## wherein R denotes a monovalent hydrocarbon radical having from 1 to 10 carbon atoms, both inclusive, the R radical which is bonded directly to silicon having an aliphatic carbon atom, x has an average value of from greater than 0 to 3, y has an average value of from greater than 0 to 3, the total value of x + y not exceeding 4.
Claim 27
Dependent Claim
13 words
A method according to claim 25 wherein each R is methyl or ethyl.
Claim 28
Dependent Claim
21 words
A method according to claim 26 wherein the organosilicon compound comprises silanes wherein the total of x + y = 4.
Claim 29
Dependent Claim
17 words
A method according to claim 27 wherein (CH 3 ) 2 SI(OCH 3 ) 2 is produced.
Claim 30
Dependent Claim
21 words
A method according to claim 27 wherein (CH 3 CH 2 ) 2 SI(OCH 2 CH 3 ) 2 is produced.
References Cited (Backward Citations)
US2459539A
Cited
US3505379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |