US3844915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing organochlorosilanes
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1972-08-01
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Granted: 1974-10-29
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Expires: 1992-08-01
Abstract
Abstract Aromatic group containing organochlorosilanes are prepared by mixing chlorine, in the absence of irradiation, with a mixture of trichlorosilanes or methyldichlorosilanes and aromatic compounds, the then introducing the resulting mixture within an extremely short period of time into a zone irradiation with light, at least 30 percent of whose rays have wave lengths not exceeding 3,800 Angstrom. A wide variety of aromatic group containing organochlorosilanes are selectively obtained by the inventive process with high yields. Further, the formation of byproducts, which are difficult to separate and/or which have not utility, is effectively prevented.
Inventors
- 👤 M Takamizawa
- 👤 T Hayashi
- 👤 M Takita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:43
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/121; C07F7/122
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
26 words
IN THE PROCESS FOR PREPARING AROMATIC GROUP CONTAINING ORGANOCHLOROSILANES COMPRISING IRRADIATING, IN THE PRESENCE OF CHLORINE, A LIQUID MIXTURE OF A CHLOROSILANE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
26 words
IN THE PROCESS FOR PREPARING AROMATIC GROUP CONTAINING ORGANOCHLOROSILANES COMPRISING IRRADIATING, IN THE PRESENCE OF CHLORINE, A LIQUID MIXTURE OF A CHLOROSILANE HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein said chlorosilane and said aromatic compound are mixed in a mole ratio of from 5:95 to 90: 10.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein said chlorine introduced into said mixture is diluted with inert gas.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein the quantity of chlorine supplied is from 0.1 to 3 mole per mole of Si-H bond in said chlorosilane.
Claim 6
Dependent Claim
29 words
The process of claim 1 wherein the amount of light emitted from the light source is from 1 to 1,000 watts per kg. of the reactants in the mixture.
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein said chlorosilane is methyldichlorosilane.
Claim 8
Dependent Claim
10 words
The process of claim 1 wherein said chlorosilane is trichlorosilane.
Claim 9
Dependent Claim
25 words
The process of claim 1 wherein time period after the admixing step and prior to irradiation is in the range from 0.1 to 0.5 second.
References Cited (Backward Citations)
US3437573A
Cited
US3642596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |