US3932156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of heavier hydrocarbons from natural gas
Assignee: HRI Inc
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Filing: 1974-03-22
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Granted: 1976-01-13
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Expires: 1994-03-22
Abstract
Abstract A gas recovery system primarily to recover propane and heavier hydrocarbons from a natural gas stream whereby separation is accomplished at lower pressures and higher temperatures normally required.
Inventors
- 👤 Sidney S. Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:32
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J3/0605; F25J3/061; F25J3/063; F25J3/0635; F25J3/0645; F25J2205/00; F25J2205/50; F25J2210/00; F25J2210/04; F25J2215/00; F25J2215/02; F25J2235/00; F25J2235/60; F25J2245/00; F25J2245/02; F25J2270/00; F25J2270/04; F25J2270/12; F25J2270/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A process for recovering C 3 and higher hydrocarbons from a feed stream of natural gas largely composed of methane which comprises: a. cooling said feed stream to a temperature of about -25°F at a pressure of about 240 psig; b. adding a lean oil to said cooled stream and flashing said mixture to form a gasiform overhead and a condensate; c. adding a lean oil to said gasiform overhead and cooling to about -25°F at a pressure of about 235 psig; d. separating the mixture of step (c) to form the lean oil of step (b) and a gaseous overhead; e. expanding said gaseous overhead of step (d) to about 25 psig; f. recovering the refrigeration of said expanded overhead in the prior cooling steps; g. flashing the condensate of step (b) to separate some methane and ethane; h. and returning the balance of the condensate of step (b) to downstream equipment from which C 3 and higher hydrocarbons are recovered.
Claim 2
Dependent Claim
162 words
A process for recovering C 3 and higher hydrocarbons from a feed stream of natural gas largely composed of methane which comprises: a. cooling said feed stream to a temperature of about -25°F at a pressure of about 240 psig; b. adding a lean oil to said cooled stream and flashing said mixture to form a gasiform overhead and a condensate; c. adding a lean oil to said gasiform overhead and cooling to about -25°F at a pressure of about 235 psig; d. separating the mixture of step (c) to form the lean oil of step (b) and a gaseous overhead; e. expanding said gaseous overhead of step (d) to about 25 psig; f. recovering the refrigeration of said expanded overhead in the prior cooling steps; g. flashing the condensate of step (b) to separate some methane and ethane; h. and returning the balance of the condensate of step (b) to downstream equipment from which C 3 and higher hydrocarbons are recovered.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |