US4251505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for carrying out gas/liquid reactions
Assignee: Hoechst AG
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Filing: 1979-07-26
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Granted: 1981-02-17
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Expires: 1999-07-26
Abstract
Abstract Gas/liquid reactions are carried out in a downstream reactor in which the gas having a bubble diameter of 0.1 to 4 mm is injected into the liquid flowing downward at an empty tube velocity of 0.14 m/s to 0.5 m/s. The proportion by volume of liquid to gas should be greater than 8:1 and the residence time of the gas at least 6 second per meter of reactor length.
Inventors
- 👤 Rudolf Steiner
- 👤 Peter Herbrechtsmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:14
CPC Classifications
B; B01; B01J; B01J10/00; Y; Y10; Y10S; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A process for carrying out gas/liquid reactions in a downstream reactor to improve the volume of gas utilized in the reactor, comprising injecting a gas having a bubble diameter of from 0.1 to 10 mm into a liquid flowing in a downward direction at an empty tube speed of 0.14 to 0.5 m/s, the proportion of said liquid to said gas being greater than 8:1 and the residence time of the gas being at least 6 seconds per meter of reactor length.
Claim 2
Dependent Claim
82 words
A process for carrying out gas/liquid reactions in a downstream reactor to improve the volume of gas utilized in the reactor, comprising injecting a gas having a bubble diameter of from 0.1 to 10 mm into a liquid flowing in a downward direction at an empty tube speed of 0.14 to 0.5 m/s, the proportion of said liquid to said gas being greater than 8:1 and the residence time of the gas being at least 6 seconds per meter of reactor length.
Claim 3
Dependent Claim
105 words
A process for carrying out gas/liquid reactions in a downstream reactor comprising injecting a gas to uniformly distribute a gas in a liquid over the cross sectional area at a head of the reactor to form a gas/liquid mixture, the proportion of said liquid to said gas being greater than 8:1 and the gas having a bubble diameter of from 0.1 to 10 mm; conveying the gas/liquid mixture downward in the reactor to a reactor outlet at an empty tube speed of 0.14 to 0.5 m/s, the residence time of the gas in the liquid being at least 6 seconds per meter of reactor length.
Claim 4
Dependent Claim
105 words
A process for carrying out gas/liquid reactions in a downstream reactor comprising injecting a gas to uniformly distribute a gas in a liquid over the cross sectional area at a head of the reactor to form a gas/liquid mixture, the proportion of said liquid to said gas being greater than 8:1 and the gas having a bubble diameter of from 0.1 to 10 mm; conveying the gas/liquid mixture downward in the reactor to a reactor outlet at an empty tube speed of 0.14 to 0.5 m/s, the residence time of the gas in the liquid being at least 6 seconds per meter of reactor length.
Claim 5
Dependent Claim
19 words
The process of claim 1 or 2, wherein the empty tube speed is from 0.2 m/s to 0.5 ms.
Claim 6
Dependent Claim
20 words
The process of claim 1 or 2, wherein the gas has a bubble diameter of from 0.1 to 4 mm.
Claim 7
Dependent Claim
17 words
The process of claim 1 or 2, wherein the gas includes phosgene and the liquid is water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |