US4455156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 09:53
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.
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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) | 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 |