Patent US2532456A successfully refreshed from Google Patents.
Patent US4252780A successfully refreshed from Google Patents.
US4252780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for working up hydrolyzable and/or water-soluble compounds
Assignee: Wacker Chemie AG
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Filing: 1979-04-25
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Granted: 1981-02-24
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Expires: 1999-04-25
Abstract
Abstract A process for working up hydrolyzable and/or water-soluble compounds by ping them in water is provided wherein the compounds are fed into the funnel of a rotating cone of water running down into the tip of the cone, with the water being constantly renewed by a supply at the base of the cone. The process is particularly useful for working up mixtures containing silanes and/or chlorosilanes in silicon deposition plants.
Inventors
- 👤 Franz Koppl
- 👤 Thorgard Zainer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:55
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/027; B01D53/00; B01D53/34; B01D53/46; B01D53/68; C; C01; C01B; C01B33/00; C01B33/02; C01B33/021; C01B33/027; C01B33/03; Y; Y10; Y10S; Y10S261/00; Y10S261/54; Y10S261/75
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A process for hydrolyzing silanes, comprising the steps of: establishing in a vessel a downwardly-tapered, downwardly-spiraling cone of water having an upper base and a lower tip so that said water runs downwardly from said upper base to said lower tip, said cone of water being hollow and having an inner surface which forms a reaction surface positioned away from the surface of said vessel which defines a liquid-free closed space; feeding said silanes into said funnel so as to hydrolyze said silanes upon contact with said reaction surface, while preventing the deposition of solid hydrolysis products on the surface of said vessel; constantly renewing said cone of water by injecting water tangentially thereto at the base of said cone of water so as to regenerate said reaction surface; and freely discharging the aqueous mixture resulting from said contact.
Claim 2
Dependent Claim
139 words
A process for hydrolyzing silanes, comprising the steps of: establishing in a vessel a downwardly-tapered, downwardly-spiraling cone of water having an upper base and a lower tip so that said water runs downwardly from said upper base to said lower tip, said cone of water being hollow and having an inner surface which forms a reaction surface positioned away from the surface of said vessel which defines a liquid-free closed space; feeding said silanes into said funnel so as to hydrolyze said silanes upon contact with said reaction surface, while preventing the deposition of solid hydrolysis products on the surface of said vessel; constantly renewing said cone of water by injecting water tangentially thereto at the base of said cone of water so as to regenerate said reaction surface; and freely discharging the aqueous mixture resulting from said contact.
Claim 3
Dependent Claim
28 words
The process according to claim 1, wherein said water is fed thereto at the base of said cone of water under a presure of 1.5 to 3 bar.
Claim 4
Dependent Claim
28 words
The process according to claim 1 or 2, wherein the compounds to be worked up are fed into said funnel under a pressure of 2 to 7 bar.
Claim 5
Dependent Claim
45 words
The process according to claim 1 or 2, additionally including the step of atomizing liquid compounds to be worked up with a carrier gas that is inert towards these compounds, before said compounds are fed to said funnel defined by said rotating cone of water.
Claim 6
Dependent Claim
16 words
The process according to claim 1, wherein kind silanes are a mixture of silanes and chlorosilanes.
Claim 7
Dependent Claim
11 words
The process according to claim 1, wherein said silanes comprise chlorosilanes.
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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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |