US2805733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of ethylene
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-03-09
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Granted: 1957-09-10
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Expires: 1976-03-09
Abstract
No abstract record available.
Inventors
- 👤 Walter H Stanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:23
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A PROCESS FOR THE REMOVAL OF ACETYLENE FROM ETHYLENE WHICH COMPRISES CONTACTING THE ACETYLENE-CONTAINING ETHYLENE IN AN ABSORPTION COLUMN WITH AN ORGANIC SOLVENT HAVING SELECTIVE DISSOLVING POWER FOR THE ECETYLENE, WITHDRAWING ETHYLENE FREE FROM ACETYLENE OVERHEAD FROM SAID ABSORPTION COLUMN, LEADING THE RICH SOLVENT FROM THE BOTTOM OF THE ABSORPTION COLUMN INTO THE MID SECTION OF A COMBINED STRIPING-ABSORPTION COLUMNWHEREIN SAID SOLVENT DESCENDS COUNTECURRENT TO THE GAS OBTAINED BY SUBJECTING THE SOLVENT EMERGING FROM THE BOTTOM OF SAID STRIPPING-ABSORPTION COLUMN TO STRIPPING IN A SEPARATE STRIPPING COLUMN AND FRESH SOLVENT IS INTRODUCED AT THE TOP OF SAID STRIPING-ABSORPTION COLUMN TO CONTACT THE RISING VAPORS AND REMOVE ACETYLENE THEREFROM, WITHDRAWING A GASEOUS STREAM CONSISTING ESSENTIALLY OF ETHYLENE OVERHEAD FROM SAID STRIPPING-ABSORPTION COLUMN AND RECYCLING SAID STREAM TO THE ABSORPTION COLUMN, LEADING THE SOLVENT FROM THE BOTTOM OF THE STRIPPING-ABSORPTION COLUMN INTO A SEPARATE STRIPPING COLUMN UNDER CONDITIONS SUCH THAT ACETYLENE CONTAINED IN ITS IS RELEASED AND WITHDRAWN OVERHEAD AND RECYCLING THE SOLVENT STRIPPED OF ACETYLENE FROM THE BOTTOM OF SAID STRIPPING COLUMN TO THE ABSORPTION COLUMN.
Claim 2
Dependent Claim
175 words
A PROCESS FOR THE REMOVAL OF ACETYLENE FROM ETHYLENE WHICH COMPRISES CONTACTING THE ACETYLENE-CONTAINING ETHYLENE IN AN ABSORPTION COLUMN WITH AN ORGANIC SOLVENT HAVING SELECTIVE DISSOLVING POWER FOR THE ECETYLENE, WITHDRAWING ETHYLENE FREE FROM ACETYLENE OVERHEAD FROM SAID ABSORPTION COLUMN, LEADING THE RICH SOLVENT FROM THE BOTTOM OF THE ABSORPTION COLUMN INTO THE MID SECTION OF A COMBINED STRIPING-ABSORPTION COLUMNWHEREIN SAID SOLVENT DESCENDS COUNTECURRENT TO THE GAS OBTAINED BY SUBJECTING THE SOLVENT EMERGING FROM THE BOTTOM OF SAID STRIPPING-ABSORPTION COLUMN TO STRIPPING IN A SEPARATE STRIPPING COLUMN AND FRESH SOLVENT IS INTRODUCED AT THE TOP OF SAID STRIPING-ABSORPTION COLUMN TO CONTACT THE RISING VAPORS AND REMOVE ACETYLENE THEREFROM, WITHDRAWING A GASEOUS STREAM CONSISTING ESSENTIALLY OF ETHYLENE OVERHEAD FROM SAID STRIPPING-ABSORPTION COLUMN AND RECYCLING SAID STREAM TO THE ABSORPTION COLUMN, LEADING THE SOLVENT FROM THE BOTTOM OF THE STRIPPING-ABSORPTION COLUMN INTO A SEPARATE STRIPPING COLUMN UNDER CONDITIONS SUCH THAT ACETYLENE CONTAINED IN ITS IS RELEASED AND WITHDRAWN OVERHEAD AND RECYCLING THE SOLVENT STRIPPED OF ACETYLENE FROM THE BOTTOM OF SAID STRIPPING COLUMN TO THE ABSORPTION COLUMN.
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |