US2870867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of acetylene from gas mixtures
Assignee: BASF SE
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Filing: 1956-01-25
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Granted: 1959-01-27
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Expires: 1976-01-25
Abstract
No abstract record available.
Inventors
- 👤 Bartholome Ernst
- 👤 Frey Otto
- 👤 Lehrer Erwin
- 👤 Lorenz Lothar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1487; B01D53/1406; C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN IMPROVED PROCESS FOR THE SEPARATION OF ACETYLENE FROM A GAS MIXTURE CONTAINING ACETYLENE AND OBTAINED BY CRACKING HYDROCARBONS WHICH COMPRISES WASHING SAID GAS MIXTURE CONTAINING POLYCYCLIC HYDROCARBON CONTAMINANTS IN A FIRST STAGE WITH AN AMOUNT OF ACETLYLENE-ABSORBING SOLVENT AND AT A PRESSURE BETWEEN ABOUT ATMOSPHERIC AND 1.5 ATMOSPHERES, WHICH AMOUNT AND PRESSURE ARE SUFFICIENTLY LOW THAT ONLY A SMALL QUANTITY OF ACETYLENE AND DIACETYLENE, BUT THE BULK OF SAID CONTAMINANTS ARE ABSORBED, WASHING THE SOLVENT FROM THE FIRST STAGE IN A SECOND STAGE WITH A LARGER AMOUNT OF THE SAME SOLVENT
Claim 2
Dependent Claim
92 words
AN IMPROVED PROCESS FOR THE SEPARATION OF ACETYLENE FROM A GAS MIXTURE CONTAINING ACETYLENE AND OBTAINED BY CRACKING HYDROCARBONS WHICH COMPRISES WASHING SAID GAS MIXTURE CONTAINING POLYCYCLIC HYDROCARBON CONTAMINANTS IN A FIRST STAGE WITH AN AMOUNT OF ACETLYLENE-ABSORBING SOLVENT AND AT A PRESSURE BETWEEN ABOUT ATMOSPHERIC AND 1.5 ATMOSPHERES, WHICH AMOUNT AND PRESSURE ARE SUFFICIENTLY LOW THAT ONLY A SMALL QUANTITY OF ACETYLENE AND DIACETYLENE, BUT THE BULK OF SAID CONTAMINANTS ARE ABSORBED, WASHING THE SOLVENT FROM THE FIRST STAGE IN A SECOND STAGE WITH A LARGER AMOUNT OF THE SAME SOLVENT
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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |