Patent US4051206A successfully refreshed from Google Patents.
US4051206A
Expired / Lapsed
US
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Sieve-type fractionation trays
Assignee: Honeywell UOP LLC
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Filing: 1976-05-10
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Granted: 1977-09-27
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Expires: 1996-05-10
Abstract
Abstract A sieve-type fractionation tray which has been adjusted for operation at a reduced vapor flow rate. Adjustment is achieved by placing an imperforate plate across the vapor passageways in a manner which selectively seals the passageways located nearest the outlet downcomer. Also a sieve-type fractionation tray having vapor passageways only on the liquid receiving lateral half of the tray.
Inventors
- 👤 Bennie I. Bunas
- 👤 Kenneth D. Uitti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:04
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A sieve-type fractionation tray which comprises a liquid support plate having a horizontal upper surface and adapted to be mounted horizontally in a fractionation column and to retain a body of liquid thereon, said liquid support plate being divided into a receiving lateral half and a discharging lateral half which is adjacent a chordal outlet downcomer, said discharging interal half and said receiving lateral half of said liquid support plate having sieve-type vapor passageways located thereon, said sieve-type vapor passageways having a total open area equal to from 2 to 20 percent of said upper horizontal surface, and a flat imperforate sealing plate which rests upon said upper horizontal surface in a manner which covers and seals all said sieve-type vapor passageways located on said discharging lateral half of said liquid support plate and which leaves unsealed those sieve-type vapor passageways located on said receiving lateral half of said liquid support plate.
Claim 2
Dependent Claim
152 words
A sieve-type fractionation tray which comprises a liquid support plate having a horizontal upper surface and adapted to be mounted horizontally in a fractionation column and to retain a body of liquid thereon, said liquid support plate being divided into a receiving lateral half and a discharging lateral half which is adjacent a chordal outlet downcomer, said discharging interal half and said receiving lateral half of said liquid support plate having sieve-type vapor passageways located thereon, said sieve-type vapor passageways having a total open area equal to from 2 to 20 percent of said upper horizontal surface, and a flat imperforate sealing plate which rests upon said upper horizontal surface in a manner which covers and seals all said sieve-type vapor passageways located on said discharging lateral half of said liquid support plate and which leaves unsealed those sieve-type vapor passageways located on said receiving lateral half of said liquid support plate.
References Cited (Backward Citations)
US2718900A
Cited
US2710790A
Cited
US2853281A
Cited
US2903251A
Cited
US2926754A
Cited
US3282576A
Cited
US3463464A
Cited
US3700216A
Cited
USRE27908E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |