Patent US4455156A successfully refreshed from Google Patents.
US4455156A
Expired / Lapsed
US
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Process for improving the gas separation in liquid/gas reactors
Assignee: Hoechst AG
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Filing: 1980-09-02
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Granted: 1984-06-19
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Expires: 2000-09-02
Abstract
Abstract Apparatus and process for ensure the coalescence and separation of fine gas bubbles in the degassing zone of liquid/gas tube or loop reactors. The invention is not limited to these two types of reactors. A liquid/gas current is introduced into a layer of solid particles whose size, density, and shape are chosen such that their sedimentation speed is greater than the speed of the rising liquid/gas mixture, and the fluidization point speed is selected to be less than the liquid speed.
Inventors
- 👤 Wolfgang Ramspeck
- 👤 Wolfgang Sittig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:35
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0005; C; C12; C12M; C12M25/00; C12M25/16; C12M25/20; C12M29/00; C12M29/06; C12M29/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A process for improving the coalescence and separation of fine gas bubbles of a liquid-gas mixture in a liquid-gas reactor, comprising introducing a gas into the mixture at a lower portion thereof so that the liquid-gas mixture rises at a liquid speed as a liquid-gas current; and passing the liquid-gas current upward through a layer of solid particles in said current to form a fluidized bed, the density of the fluidized bed being greater than that of the liquid-gas mixture; wherein the said solid particles have a density of 0.5 to 13 g/cm 3 and a nominal size of 0.1 to 100 mm; with the size, density, and shape thereof being selected so that the particles have a sedimentation velocity which is higher than said liquid speed, and so that said liquid speed is higher than that necessary for their fluidization
Claim 2
Dependent Claim
141 words
A process for improving the coalescence and separation of fine gas bubbles of a liquid-gas mixture in a liquid-gas reactor, comprising introducing a gas into the mixture at a lower portion thereof so that the liquid-gas mixture rises at a liquid speed as a liquid-gas current; and passing the liquid-gas current upward through a layer of solid particles in said current to form a fluidized bed, the density of the fluidized bed being greater than that of the liquid-gas mixture; wherein the said solid particles have a density of 0.5 to 13 g/cm 3 and a nominal size of 0.1 to 100 mm; with the size, density, and shape thereof being selected so that the particles have a sedimentation velocity which is higher than said liquid speed, and so that said liquid speed is higher than that necessary for their fluidization
Claim 3
Dependent Claim
24 words
The process as claimed in claim 1, wherein the height of the fluidized bed is 0.2 to 3 times that of its largest diameter.
Claim 4
Dependent Claim
19 words
The process as claimed in claim 1 or 2, wherein an anit-foaming agent is introduced into the fluidized bed.
References Cited (Backward Citations)
SU269030A1
Cited
US2518845A
Cited
US2764533A
Cited
US3377778A
Cited
DE1805360A1
Cited
US3626670A
Cited
US3826739A
Cited
US3648438A
Cited
US3966599A
Cited
FR2173042A1
Cited
US3966608A
Cited
FR2274346A1
Cited
GB1491502A
Cited
US4166730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |