Patent US4297329A successfully refreshed from Google Patents.
US4297329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-liquid contacting system
Assignee: Katalistiks International Inc
•
Filing: 1980-05-14
•
Granted: 1981-10-27
•
Expires: 2000-05-14
Abstract
Abstract A vapor-liquid contacting tray wherein a perforated portion of the tray member forms an active surface area for vapor-liquid contact in the interior of the tray member. The active surface area portion of the tray member is circumscribed by an imperforate peripheral portion of the tray member with a width of from 0.05 to 0.35 times the radius of the tray. The disclosed tray provides upwardly directed laminar jetting of liquid over the tray perforation openings for high selectivity vapor-liquid contacting and has particular utility in the absorption of hydrogen sulfide from a gas mixture containing hydrogen sulfide and carbon dioxide.
Inventors
- 👤 Paul W. Sigmund
- 👤 Kenneth F. Butwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; B01D3/00; B01D3/14; B01D3/16; B01D3/22; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
In a process for absorbing hydrogen sulfide from a gas mixture containing hydrogen sulfide and carbon dioxide by an amine liquid solvent in an absorption zone containing a plurality of generally horizontally aligned, vertically spaced-apart perforated trays on which liquid solvent, flowing generally downwardly through the absorption zone from tray to tray, is contacted with upwardly flowing gas mixture, the improvement comprising: (a) providing an open area of from 3 to 5% on each of said trays, formed by fixed size perforation openings of from 1/16 to 3/32 inch diameter; (b) flowing said gas mixture through said open area perforation openings at a velocity of from 50 to 133 ft/sec; and (c) maintaining the liquid height of said amine solvent on said trays in the range of from 1/8 to 3/8 inch, whereby upwardly directed laminar jetting of liquid is obtained over said tray perforation openings for solvent-gas mixture contacting and selective hydrogen sulfide absorption.
Claim 2
Dependent Claim
155 words
In a process for absorbing hydrogen sulfide from a gas mixture containing hydrogen sulfide and carbon dioxide by an amine liquid solvent in an absorption zone containing a plurality of generally horizontally aligned, vertically spaced-apart perforated trays on which liquid solvent, flowing generally downwardly through the absorption zone from tray to tray, is contacted with upwardly flowing gas mixture, the improvement comprising: (a) providing an open area of from 3 to 5% on each of said trays, formed by fixed size perforation openings of from 1/16 to 3/32 inch diameter; (b) flowing said gas mixture through said open area perforation openings at a velocity of from 50 to 133 ft/sec; and (c) maintaining the liquid height of said amine solvent on said trays in the range of from 1/8 to 3/8 inch, whereby upwardly directed laminar jetting of liquid is obtained over said tray perforation openings for solvent-gas mixture contacting and selective hydrogen sulfide absorption.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein said amine liquid solvent comprises an aqueous solution of methyl diethanolamine.
Claim 4
Dependent Claim
24 words
A process according to claim 1 wherein said gas mixture flow velocity through said open area perforation openings is from 80 to 100 ft/sec.
References Cited (Backward Citations)
US415133A
Cited
CA724635A
Cited
US2672330A
Cited
US2608461A
Cited
CH312719A
Cited
GB823108A
Cited
US3218781A
Cited
US3410540A
Cited
US3489506A
Cited
US3961015A
Cited
CA947045A
Cited
US3829521A
Cited
US3892837A
Cited
US3958964A
Cited
US3965244A
Cited
US4099925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |