Patent US2726734A successfully refreshed from Google Patents.
US2726734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylene purification
Assignee: Lummus Technology LLC
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Filing: 1954-05-11
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Granted: 1955-12-13
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Expires: 1974-05-11
Abstract
No abstract record available.
Inventors
- 👤 Nirenberg Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:03
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
IN THE PROCESS FOR RECOVERING ACETYLENE FROM A CRACKED GAS MIXTURES WHICH INCLUDES DIACETYLENE, VINYL ACETYLENE, METHANE, HYDROGEN AND OTHER COMPONENTS, THE STEPS COMPRISING INITIALLY CONTACTING THE CRACKED GAS WITH A FIRST PORTION OF SELECTIVE SOLVENT TO OBTAIN A SOLVENT STREAM RICH IN DIACETYLENE AND HEAVIER COMPONENTS, AND AN ACETYLENE CONTAINING OVERHEAD SUBSTANTIALLY FREE OF DIACETYLENE, STRIPPING DIACETYLENE FROM THE SOLVENT STREAM AND PASSING THE STRIPPED SOLVENT TO A SOLVENT RETURN SYSTEM, CONTACTING THE ACETYLENE CONTAINING OVERHEAD WITH A SECOND PORTION OF SOLVENT TO OBTAIN SUBSTANTIALLY COMPLETE ABSORPTION OF THE ACETYLENES BY SAID SECOND PORTION OF SOLVENT, HEATING THE ACETYLENE RICH SOLVENT TO FLASH OFF SAID ACETYLENES, PASSING THE FLASHED ACETYLENES TO AN ACETYLENE RECOVERY COLUMN, CONTACTING SAID ACETYLENES IN THE ACETYLENE RECOVERY COLUMN WITH SUBSTANTIALLY PURE SOLVENT OBTAINED FROM THE RETURN SYSTEM TO PROVIDE AN OVERHEAD PRODUCT COMPRISING SUBSTANTIALLY PURE ACETYLENE AND PROPORTIONING THE SOLVENT REMAINING AFTER THE FLASHING OF ACETYLENES INTO THE FIRST AND SECOND SOLVENT PORTIONS UTILIZED IN THE ABSORPTION OF DIACETYLENE AND THE ABSORPTION OF ACETYLENE.
Claim 2
Dependent Claim
170 words
IN THE PROCESS FOR RECOVERING ACETYLENE FROM A CRACKED GAS MIXTURES WHICH INCLUDES DIACETYLENE, VINYL ACETYLENE, METHANE, HYDROGEN AND OTHER COMPONENTS, THE STEPS COMPRISING INITIALLY CONTACTING THE CRACKED GAS WITH A FIRST PORTION OF SELECTIVE SOLVENT TO OBTAIN A SOLVENT STREAM RICH IN DIACETYLENE AND HEAVIER COMPONENTS, AND AN ACETYLENE CONTAINING OVERHEAD SUBSTANTIALLY FREE OF DIACETYLENE, STRIPPING DIACETYLENE FROM THE SOLVENT STREAM AND PASSING THE STRIPPED SOLVENT TO A SOLVENT RETURN SYSTEM, CONTACTING THE ACETYLENE CONTAINING OVERHEAD WITH A SECOND PORTION OF SOLVENT TO OBTAIN SUBSTANTIALLY COMPLETE ABSORPTION OF THE ACETYLENES BY SAID SECOND PORTION OF SOLVENT, HEATING THE ACETYLENE RICH SOLVENT TO FLASH OFF SAID ACETYLENES, PASSING THE FLASHED ACETYLENES TO AN ACETYLENE RECOVERY COLUMN, CONTACTING SAID ACETYLENES IN THE ACETYLENE RECOVERY COLUMN WITH SUBSTANTIALLY PURE SOLVENT OBTAINED FROM THE RETURN SYSTEM TO PROVIDE AN OVERHEAD PRODUCT COMPRISING SUBSTANTIALLY PURE ACETYLENE AND PROPORTIONING THE SOLVENT REMAINING AFTER THE FLASHING OF ACETYLENES INTO THE FIRST AND SECOND SOLVENT PORTIONS UTILIZED IN THE ABSORPTION OF DIACETYLENE AND THE ABSORPTION OF 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) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |