Patent US3648434A successfully refreshed from Google Patents.
US3648434A
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Glycol regeneration using eductor flash separation
Assignee: MALONEY-CRAWFORD TANK CORP
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Filing: 1969-02-27
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Granted: 1972-03-14
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Expires: 1989-02-27
Abstract
Abstract Reconcentration of liquid desiccant, such as glycol, used in the dehydration of gaseous steams, is accomplished by aiding the separation of water subsequent the reboiler by an induced vacuum into a separate flash chamber. The vacuum is created by a pump that is fluid impelled by either the desiccant or gas available in the process.
Inventors
- 👤 Charles K Gravis
- 👤 Harold S Wood
- 👤 Robert A Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:52
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D53/263; B01D1/00; B01D3/00; B01D3/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
14 words
A method according to claim 1 including creating said vacuum by a fluid-impellent pump.
Claim 2
Dependent Claim
17 words
A method according to claim 2 wherein said fluid impellent is Said liquid desiccant from said contactor.
Claim 3
Dependent Claim
15 words
A method according to claim 3 wherein said impellent is heat exchanged with reconcentrated desiccant.
Claim 4
Dependent Claim
17 words
A method according to claim 2 wherein said fluid impellent is relatively dry fluid from said contactor.
Claim 5
Dependent Claim
12 words
A method according to claim 5 wherein said fluid is a gas.
Claim 6
Dependent Claim
137 words
Apparatus for reconcentrating liquid desiccant used in a fluid dehydration contactor, such as glycol, comprising in combination: a reboiler to create partially reconcentrated desiccant; a float operated valve to trap and remove a portion of said partially reconcentrated desiccant and to maintain a substantially constant level of desiccant within said reboiler; a flash separation chamber separated from said reboiler; conduit means to convey said portion of said partially reconcentrated desiccant from the outlet of said float operated valve thence back into said reboiler adjacent the source of heat for heat exchange with the remaining partially reconcentrated desiccant therein, thence to said flash chamber to make a higher reconcentrated desiccant; means to induce a vacuum in said flash chamber; and means to flow said higher reconcentrated desiccant from said flash chamber to, eventually, said gas dehydration contacting tower.
Claim 7
Dependent Claim
28 words
Apparatus of claim 7 wherein said means to induce said vacuum comprises a fluid impellent pump and vacuum conduit means connecting between said pump and said flash chamber.
Claim 8
Dependent Claim
14 words
Apparatus of claim 8 wherein said fluid impellent is liquid desiccant from said contactor.
Claim 9
Dependent Claim
30 words
Apparatus of claim 9 wherein said fluid impellent is heat exchanged with said higher reconcentrated desiccant prior to use in said pump, and means to cool said vacuum conduit means.
Claim 10
Dependent Claim
27 words
Apparatus of claim 10 wherein a diffusion pump, using a heat source from said reboiler, is interposed in said vacuum line between said chamber and said pump.
Claim 11
Dependent Claim
16 words
Apparatus according to claim 8 wherein said fluid impellent is relatively dry fluid from said contactor.
Claim 12
Dependent Claim
11 words
Apparatus of claim 8 including means to cool said vacuum conduit.
References Cited (Backward Citations)
US3206916A
Cited
US3217466A
Cited
US3347019A
Cited
US3318071A
Cited
US3451897A
Cited
US3370636A
Cited
US3397731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |