US4497942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hydrolyzing chlorosilanes
Assignee: General Electric Co
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Filing: 1983-12-14
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Granted: 1985-02-05
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Expires: 2003-12-14
Abstract
Abstract A method is provided for hydrolyzing chlorosilanes utilizing a static tubular reactor. A substantial reduction in hydrolysis residence time is achieved.
Inventors
- 👤 Yaw D. Yeboah
- 👤 Michael P. Venditti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:41
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0874; C07F7/21
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
A process which comprises, (1) introducing organochlorosilane and hydrochloric acid in a proportion of from about 10 to 50 moles of water, per mole of organochlorosilane into a static tubular reactor having elements capable of directing material flow radially towards the reactor wall and back to the elements, where the resulting fluid material is conveyed through the reactor at a rate sufficient to achieve a degree of turbulent mixing capable of substantially converting the organochlorosilane to organopolysiloxane within 60 seconds or less, and where the hydrochloric acid is used at a concentration sufficient to generate anhydrous HCl as a by-product, (2) recovering the organopolysiloxane and anhydrous HCl from (1).
Claim 2
Dependent Claim
109 words
A process which comprises, (1) introducing organochlorosilane and hydrochloric acid in a proportion of from about 10 to 50 moles of water, per mole of organochlorosilane into a static tubular reactor having elements capable of directing material flow radially towards the reactor wall and back to the elements, where the resulting fluid material is conveyed through the reactor at a rate sufficient to achieve a degree of turbulent mixing capable of substantially converting the organochlorosilane to organopolysiloxane within 60 seconds or less, and where the hydrochloric acid is used at a concentration sufficient to generate anhydrous HCl as a by-product, (2) recovering the organopolysiloxane and anhydrous HCl from (1).
Claim 3
Dependent Claim
12 words
A method in accordance with claim 1 where the organochlorosilane is dimethyldichlorosilane.
References Cited (Backward Citations)
US2758124A
Cited
US2832794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |