US3633371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas separation
Assignee: Phillips Petroleum Co
•
Filing: 1968-04-05
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Granted: 1972-01-11
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Expires: 1988-04-05
Abstract
Abstract A method for recovering ethane and heavier from a normally gaseous material by partially condensing the gas by cooling to a temperature in the range of from about -70* to about -120* F., removing uncondensed gas with an absorbent at a temperature in the range of from about -70* to about -120* F.
Inventors
- 👤 Joseph W Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:00
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0238; C; C07; C07C; C07C7/00; C07C7/005; C07C7/11; C10; C10G; C10G5/00; C10G5/04; F25J3/0204; F25J3/0209; F25J3/0233; F25J3/0247; F25J2205/00; F25J2205/02; F25J2205/04; F25J2205/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
34 words
The method according to claim 1 wherein said gas and liquid separating step and said absorbing step are each carried out at substantially the same pressure as the initial pressure of said feed gas.
Claim 2
Dependent Claim
58 words
A method according to claim 1 wherein said gas and liquid separating step is carried out at a substantially lower than the initial pressure of said feed gas to cause flashing of a part of the liquefied feed gas, and said absorbing step is carried out at substantially the same pressure as said gas and liquid separation step.
Claim 3
Dependent Claim
37 words
A method according to claim 1 wherein said feed gas consists essentially of a finite amount up to 25 volume percent ethane, the remainder being essentially methane and propane; and the absorbent consists essentially of normal hexane.
References Cited (Backward Citations)
US2603310A
Cited
US2765635A
Cited
US2775103A
Cited
US2815650A
Cited
US2933901A
Cited
US3247649A
Cited
US3359743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |