US2522640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hydrocarbon gases at low temperatures
Assignee: PETROCARBON Ltd
•
Filing: 1948-02-18
•
Granted: 1950-09-19
•
Expires: 1968-02-18
Abstract
No abstract record available.
Inventors
- 👤 Ruhemann Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:05
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN THE PROCESS OF SEPARATING HYDROCARBON GASES FROM GASEOUS MIXTURES COMPRISING ALKANES AND ALKENES HAVING NOT MORE THAN 5 CARBON ATOMS IN THE MOLECULE WHEREIN A STREAM OF THE GASEOUS MIXTURE IS COMPRESSED AND COOLED AT A LOW TEMPERATURE TO LIQUEFY THE HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY ADDING TO SAID GASEOUS STREAM PRIOR TO THE COOLING STEP A QUANTITY OF METHANOL WHICH, WHEN MIXED WITH THE WATER PRESENT IN THE GASES, PRODUCES A METHANOL-WATER MIXTURE HAVING A FREEZING POINT BELOW THE TEMPERATURE EMPLOYED IN THE COOLING STEP, THEN COOLING THE MIXED STREAM OF GASES TO A TEMPERATURE BETWEEN -100* C. AND -138* C., COLLECTING THE CONDENSATE RESULTING FROM THE COOLING STEP, WHEREBY A METHANOL-WATER MIXTURE COLLECTS AS A SEPARATE LAYER BENEATH A HYDROCARBON LAYER, AND REMOVING SAID METHANOL-WATER MIXTURE.
Claim 2
Dependent Claim
130 words
IN THE PROCESS OF SEPARATING HYDROCARBON GASES FROM GASEOUS MIXTURES COMPRISING ALKANES AND ALKENES HAVING NOT MORE THAN 5 CARBON ATOMS IN THE MOLECULE WHEREIN A STREAM OF THE GASEOUS MIXTURE IS COMPRESSED AND COOLED AT A LOW TEMPERATURE TO LIQUEFY THE HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY ADDING TO SAID GASEOUS STREAM PRIOR TO THE COOLING STEP A QUANTITY OF METHANOL WHICH, WHEN MIXED WITH THE WATER PRESENT IN THE GASES, PRODUCES A METHANOL-WATER MIXTURE HAVING A FREEZING POINT BELOW THE TEMPERATURE EMPLOYED IN THE COOLING STEP, THEN COOLING THE MIXED STREAM OF GASES TO A TEMPERATURE BETWEEN -100* C. AND -138* C., COLLECTING THE CONDENSATE RESULTING FROM THE COOLING STEP, WHEREBY A METHANOL-WATER MIXTURE COLLECTS AS A SEPARATE LAYER BENEATH A HYDROCARBON LAYER, AND REMOVING SAID METHANOL-WATER MIXTURE.
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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |