Patent US3789113A successfully refreshed from Google Patents.
US3789113A
Expired / Lapsed
US
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Modified system for heavy water production
Assignee: General Electric Canada Co
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Filing: 1971-01-29
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Granted: 1974-01-29
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Expires: 1991-01-29
Abstract
Abstract In a heavy water isotopic separation process wherein hydrogen sulphide is separated from waste water and recirculated back to the process by absorption into incoming feed water, the pressures of feed water and the pressure of gas extracted from the waste water are controlled to permit reabsorption of the gas without intermediate recompression.
Inventors
- 👤 V Thayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:13
CPC Classifications
C; C01; C01B; C01B5/00; C01B5/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
The method as claimed in claim 1, including the further step of heating a portion of liquid from the flashing step to produce water vapor, and using said water vapor to strip a further quantity of H2S gas from the hot effluent liquid in a stripping column receiving said hot liquid therein, said further heating step being effected with low pressure, low temperature steam, and passing said further quantity of gas to said absorber section.
Claim 2
Dependent Claim
64 words
The method as claimed in claim 1 including a step of prior flashing of said extracted hot liquid from said first pressure to a pressure having a value substantially above the pressure of said first flashing step and passing gas evolvEd thereby to a portion of said absorber section pressurized to a value greater than said second pressure for re-absorption into said feed water.
Claim 3
Dependent Claim
31 words
The method as claimed in claim 2 including the step of passing said evolved gas after flashing to a cooling zone to condense water vapor therefrom prior to said reabsorption step.
Claim 4
Dependent Claim
22 words
The method as claimed in claim 1 wherein said absorber section is operated at a pressure in the order of 125 PSIG.
Claim 5
Dependent Claim
27 words
The method as claimed in claim 2 wherein said stripping column is heated at the base whereby said water vapor rises upwardly therein in heat transfer relation.
Claim 6
Dependent Claim
23 words
The method as claimed in claim 3 wherein said prior flashing step takes place at a pressure in the order of 200 PSIG.
References Cited (Backward Citations)
US2895803A
Cited
US3437567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |