US4672135A
Expired / Lapsed
US
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Catalytic process for producing silahydrocarbons
Assignee: Monsanto Co
•
Filing: 1986-05-02
•
Granted: 1987-06-09
•
Expires: 2006-05-02
Abstract
Abstract Silahydrocarbons such as tetraorganosilanes prepared from halo-substituted silanes and an organomagnesium compound in the presence of a catalytically effective amount of a thiocyanate.
Inventors
- 👤 Patrick J. Lennon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:21
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0825; C07F7/0827; C07F7/0805
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
19 words
A process for producing silahydrocarbons comprising mixing in solution a halo-substituted silane, an organomagnesium compound and a thiocyanate compound.
Claim 2
Dependent Claim
19 words
A process for producing silahydrocarbons comprising mixing in solution a halo-substituted silane, an organomagnesium compound and a thiocyanate compound.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein said thiocyanate compound is present such that the molar ratio of thiocyanate to halo-substituted silane is less than about 0.2:1.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said organomagnesium compound comprises a Grignard reagent.
Claim 5
Dependent Claim
16 words
The process of claim 3 wherein said process is carried out in a Grignard stable solvent.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein said solvent comprises an ether.
Claim 7
Dependent Claim
10 words
The process of claim 5 wherein said ether comprises tetrahydrofuran.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said halo-substituted silane is an organotrihalosilane.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein said organomagnesium compound comprises diorganomagnesium.
Claim 10
Dependent Claim
16 words
The process of claim 8 wherein said process is carried out in a Grignard stable solvent.
Claim 11
Dependent Claim
11 words
The process of claim 9 wherein said solvent comprises an ether.
Claim 12
Dependent Claim
10 words
The process of claim 10 wherein said ether comprises tetrahydrofuran.
Claim 13
Dependent Claim
29 words
A process for producing silahydrocarbons by reacting a halo-substituted silane with an organomagnesium compound comprising effecting said reacting in the presence of a catalytically effective amount of a thiocyanate.
Claim 14
Dependent Claim
29 words
A process for producing silahydrocarbons by reacting a halo-substituted silane with an organomagnesium compound comprising effecting said reacting in the presence of a catalytically effective amount of a thiocyanate.
Claim 15
Dependent Claim
16 words
The process of claim 12 wherein said reacting is carried out in a Grignard stable solvent.
Claim 16
Dependent Claim
11 words
The process of claim 13 wherein said solvent comprises an ether.
Claim 17
Dependent Claim
10 words
The process of claim 14 wherein said ether comprises tetrahydrofuran.
Claim 18
Dependent Claim
15 words
The process of claim 12 wherein said organomagnesium compound comprises diorganomagnesium or a Grignard reagent.
Claim 19
Dependent Claim
23 words
The process of claim 16 wherein said organomagnesium compound comprises dialkylmagnesium, diarylmagnesium, an alkyl Grignard reagent, an aryl Grignard reagent, or mixtures thereof.
Claim 20
Dependent Claim
16 words
The process of claim 12 wherein halo-substituted silane is added to a solution of organomagnesium compound.
Claim 21
Dependent Claim
21 words
The process of claim 18 wherein the molar ratio of said thiocyanate to reacted halo-substituted silane is less than about 0.2:1.
Claim 22
Dependent Claim
16 words
A process comprising adding a halo-substituted silane to a solution of organomagnesium compound containing a thiocyanate.
Claim 23
Dependent Claim
16 words
A process comprising adding a halo-substituted silane to a solution of organomagnesium compound containing a thiocyanate.
Claim 24
Dependent Claim
12 words
The process of claim 20 wherein said solution comprises an ether solvent.
Claim 25
Dependent Claim
11 words
The process of claim 21 wherein said ether solvent comprises tetrahydrofuran.
Claim 26
Dependent Claim
15 words
The process of claim 22 wherein said thiocyanate is present in a catalytically effective amount.
Claim 27
Dependent Claim
31 words
The process of claim 23 wherein said thiocyanate is present in an amount such that the molar ratio of thiocyanate to amount of halo-substituted silane added is less than about 0.2:1.
Claim 28
Dependent Claim
33 words
The process of claim 24 wherein halo-substituted silane is SiX n R 4-n , where X is a halogen; R is hydrogen, alkyl, aryl, alkaryl, alkoxy, amine, or siloxy; and n is 1-4.
Claim 29
Dependent Claim
26 words
The process of claim 25 wherein said organomagnesium compound is R 2 Mg or RMgX, when X is halogen; and R is alkyl, aryl, or alkaryl.
Claim 30
Dependent Claim
23 words
A process for producing tetraorganosilanes comprising reacting halo-substituted silanes with organomagnesium compounds in the presence of a catalytically effective amount of a thiocyanate.
Claim 31
Dependent Claim
23 words
A process for producing tetraorganosilanes comprising reacting halo-substituted silanes with organomagnesium compounds in the presence of a catalytically effective amount of a thiocyanate.
Claim 32
Dependent Claim
12 words
The process of claim 27 wherein said halo-substituted silane is an organotrihalosilane.
Claim 33
Dependent Claim
27 words
The process of claim 27 wherein said organomagnesium compound is R 2 Mg or RMgX, where X is a halogen; and R is alkyl, aryl, or alkaryl.
Claim 34
Dependent Claim
17 words
The process of claim 29 wherein said reacting is carried out in a medium comprising an ether.
Claim 35
Dependent Claim
10 words
The process of claim 30 wherein said ether comprises tetrahydrofuran.
References Cited (Backward Citations)
US2212992A
Cited
US2380057A
Cited
US2426122A
Cited
US2813886A
Cited
US2813887A
Cited
US2872471A
Cited
US3426087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |