Patent US3325972A successfully refreshed from Google Patents.
US3325972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating acetylene from gas mixtures
Assignee: BASF SE
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Filing: 1964-04-17
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Granted: 1967-06-20
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Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 Friz Hans
- 👤 Reichert Martin
- 👤 Wagner Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:47
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/005; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN A PROCESS FOR SEPARATING ACETYLENE FROM GAS MIXTURES WHICH HAVE BEEN OBTAINED BY THE CRACKING OF HYDROCARBONS, BY WASHING THE GAS MIXTURE WITH A SOLVENT FOR ACETYLENE IN A PRELIMINARY WASHING, WASHING OUT THE ACETYLENE AND AT LEAST A PORTION OF GASEOUS COMPOUNDS HAVING BETTER SOLUBILITY THAN ACETYLENE FROM THE GAS MIXTURE IN A MAIN WASHING UNDER PRESSURE WITH A MAIN WASHING LIQUOR CONTAINING A LARGER AMOUNT OF SOLVENT THAN IN THE PRELIMINARY WASHING, PASSING SAID MAIN WASHING LIQUOR AND DISSOLVED GASES TOA STRIPPING TOWER, EXPELLING A MAJOR PORTION OF THE ACETYLENE FROM THE MAIN WASHING LIQUOR IN SAID STRIPPING TOWER, PASSING SAID STRIPPED MAIN WASHING LIQUOR TO A DEGASSING TOWER, EXPELLING THE REMAINDER OF ACETYLENE IN SAID DEGASSING TOWER AND RETURNING SAID ACETYLENE TO SAID STRIPPING TOWER, PURIFYING SAID ACETYLENE IN COUNTERCURRENT CONTACT WITH THE MAIN WAHING LIQUOR IN SAID STRIPPING TOWER, REMOVING FROM THE MAIN WASHING LIQUOR THE COMPOUNDS OF BETTE SOLUBILITY THAN ACETYLENE
Claim 2
Dependent Claim
157 words
IN A PROCESS FOR SEPARATING ACETYLENE FROM GAS MIXTURES WHICH HAVE BEEN OBTAINED BY THE CRACKING OF HYDROCARBONS, BY WASHING THE GAS MIXTURE WITH A SOLVENT FOR ACETYLENE IN A PRELIMINARY WASHING, WASHING OUT THE ACETYLENE AND AT LEAST A PORTION OF GASEOUS COMPOUNDS HAVING BETTER SOLUBILITY THAN ACETYLENE FROM THE GAS MIXTURE IN A MAIN WASHING UNDER PRESSURE WITH A MAIN WASHING LIQUOR CONTAINING A LARGER AMOUNT OF SOLVENT THAN IN THE PRELIMINARY WASHING, PASSING SAID MAIN WASHING LIQUOR AND DISSOLVED GASES TOA STRIPPING TOWER, EXPELLING A MAJOR PORTION OF THE ACETYLENE FROM THE MAIN WASHING LIQUOR IN SAID STRIPPING TOWER, PASSING SAID STRIPPED MAIN WASHING LIQUOR TO A DEGASSING TOWER, EXPELLING THE REMAINDER OF ACETYLENE IN SAID DEGASSING TOWER AND RETURNING SAID ACETYLENE TO SAID STRIPPING TOWER, PURIFYING SAID ACETYLENE IN COUNTERCURRENT CONTACT WITH THE MAIN WAHING LIQUOR IN SAID STRIPPING TOWER, REMOVING FROM THE MAIN WASHING LIQUOR THE COMPOUNDS OF BETTE SOLUBILITY THAN ACETYLENE
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |