US2887850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methane separated from hydrogen using ethane as an absorbent
Assignee: Phillips Petroleum Co
•
Filing: 1955-12-19
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Granted: 1959-05-26
•
Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Loyd W Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:23
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0238; C; C01; C01B; C01B3/00; C01B3/50; C01B3/506; F25J3/0204; F25J3/0219; F25J3/0233; F25J3/0242; F25J3/0252; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/048; C01B2203/0485; F25J2200/00; F25J2200/72; F25J2200/74; F25J2205/00; F25J2205/02; F25J2205/04; F25J2205/50; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD FOR CONCENTRATING HYDROGEN COMPRISING CONTACTING A CHARGE STOCK CONTAINING HYDROGEN AND MINOR AMOUNTS OF NORMALLY GASEOUS HYDROCARBONS WITH A LEAN LIQUID ABSORBENT SELECTED FROM THE GROUP CONSISTING OF ETHANE, ETHYLENE, PROPANE AND PROPYLENE AT A SEPARATMOSPHERIC PRESSURE AND SUBATMOSPHERIC TEMPERATURE FROM THIS CONTACTING OPERATION WITHDRAWING A CONTACTED STREAM OF GAS HAVING A GREATER HYDROGEN CONTENT THAN SAID CHARGE STOCK AS THE MAIN PRODUCT OF THE OPERATION, ALSO WITHDRAWING RICH LIQUID ABSORBENT FROM SAID OPERATION, FRACTIONATING THIS WITHDRAWN RICH LIQUID ABSORBENT AT SUBSTANTIALLY SAID SUPERATMOSPHERIC PRESSURE TO PRODUCE AN OVERHEAD PRODUCT COMPRISING METHANE AND A KETTLE PRODUCT COMPRISING SAID LEAN LIQUID ABSORBENT, CHILLING SAID KETTLE PRODUCT COMPRISING SAID LIQUID ABSORBENT BY EVAPORATING A PORTION THEREOF, AND PASSING THE REMAINING AND CHILLED PORTION OF SAID KETTLE PORDUCT TO THE
Claim 2
Independent Claim
129 words
A METHOD FOR CONCENTRATING HYDROGEN COMPRISING CONTACTING A CHARGE STOCK CONTAINING HYDROGEN AND MINOR AMOUNTS OF NORMALLY GASEOUS HYDROCARBONS WITH A LEAN LIQUID ABSORBENT SELECTED FROM THE GROUP CONSISTING OF ETHANE, ETHYLENE, PROPANE AND PROPYLENE AT A SEPARATMOSPHERIC PRESSURE AND SUBATMOSPHERIC TEMPERATURE FROM THIS CONTACTING OPERATION WITHDRAWING A CONTACTED STREAM OF GAS HAVING A GREATER HYDROGEN CONTENT THAN SAID CHARGE STOCK AS THE MAIN PRODUCT OF THE OPERATION, ALSO WITHDRAWING RICH LIQUID ABSORBENT FROM SAID OPERATION, FRACTIONATING THIS WITHDRAWN RICH LIQUID ABSORBENT AT SUBSTANTIALLY SAID SUPERATMOSPHERIC PRESSURE TO PRODUCE AN OVERHEAD PRODUCT COMPRISING METHANE AND A KETTLE PRODUCT COMPRISING SAID LEAN LIQUID ABSORBENT, CHILLING SAID KETTLE PRODUCT COMPRISING SAID LIQUID ABSORBENT BY EVAPORATING A PORTION THEREOF, AND PASSING THE REMAINING AND CHILLED PORTION OF SAID KETTLE PORDUCT TO THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |