US3740962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for the recovery of helium from a natural gas stream
Assignee: COMMONWEALTH ASS INC US
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Filing: 1970-09-18
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Granted: 1973-06-26
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Expires: 1990-09-18
Abstract
Abstract A process for recovery of helium from a natural gas stream containing components such as acid gases, moisture, hydrocarbons, nitrogen and helium. The process includes steps of feed gas preparation, refrigeration cooling and liquefaction, and separation of helium from the hydrocarbons and then nitrogen. Apparatus for carrying out the process is disclosed.
Inventors
- 👤 S Fan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:38
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0238; F25J3/0204; F25J3/0209; F25J3/0233; F25J3/0242; F25J3/0257; F25J3/028; F25J3/029; F25J2200/00; F25J2200/08; F25J2200/10; F25J2200/50; F25J2215/00; F25J2215/62; F25J2220/00; F25J2220/60; F25J2220/66; F25J2270/00; F25J2270/12; F25J2270/42; F25J2270/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
The process that is defined in claim 1, wherein the lower liquid stream from said lower section is passed in heat transfer relation to said gas stream for cooling the same and is then recompressed as a gas to 700 psia for discharge into the source of the natural gas stream.
Claim 2
Dependent Claim
57 words
The process that is defined in claim 1, wherein the lower liquid stream from said upper section is passed in heat transfer relation to said incoming gas stream for cooling the same and is then utilized as purge gas in conjunction with the removal of moisture from the natural gas stream and thereafter as plant fuel gas.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |