Patent US3230690A successfully refreshed from Google Patents.
US3230690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of acetylene and ethylene from a mixed gas
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1963-04-16
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Granted: 1966-01-25
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Expires: 1983-04-16
Abstract
No abstract record available.
Inventors
- 👤 Nishioka Kinichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:26
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A METHOD FOR SEPARATING ACETYLENE AND ETHYLENE FROM A MIXED GAS WHICH COMPRISES: ABSORBING ACETYLENE THEREFROM BY CONTACT OF SAID MIXED GAS AT SUPERATOMOSPHERIC PRESSURE AND AT A PREDETERMINED TEMPERATURE WITH A SUITABLE SOLVENT FOR ACETYLENE; COMPRESSING THE DE-ACETYLENIZED GAS TO AN ELEVATED PRESSURE LEVEL AT LEAST THREE-FOLD THAT OF THE ACETYLENE ABSORPTION; STRIPPING ACETYLENE FROM THE ACETYLENE ENRICHED SOLVENT; CHILLING THE STRIPPED DE-ACETYLENIZED GAS TO AN ELEVATED PERATURE LEVEL AT LEAST 15*C. BELOW THAT OF THE ACETYLENE ABSORPTION; ABSORBING ETHYLENE FROM THE COMPRESSED DE-ACETYLENIZED GAS BY CONTACT WITH THE CHILLED SOLVENT AT THE ELEVATED PRESSURE LEVEL; WARMING AND LOWERING THE PRESSURE OF THE ETHYLENEENRICHED SOLVENT TO ABOUT THE PRESSURE-TEMPERATURE CONDITIONS EMPLOYED FOR THE ACETYLENE ABSORPTION TO RELEASE ETHYLENE THEREFROM; AND THEN DIRECTLY CYCLING THE SO DE-ETHYLENIZED SOLVENT TO THE ACETYLENE ABSORPTION, THEREBY EMPLOYING FOR ACETYLENE ABSORPTION IN THE SOLVENT AND FOR ETHYLENE RELEASE FROM THE SOLVENT ESSENTIALLY THE SAME PRESSURE-TEMPERATURE CONDITIONS.
Claim 2
Independent Claim
152 words
A METHOD FOR SEPARATING ACETYLENE AND ETHYLENE FROM A MIXED GAS WHICH COMPRISES: ABSORBING ACETYLENE THEREFROM BY CONTACT OF SAID MIXED GAS AT SUPERATOMOSPHERIC PRESSURE AND AT A PREDETERMINED TEMPERATURE WITH A SUITABLE SOLVENT FOR ACETYLENE; COMPRESSING THE DE-ACETYLENIZED GAS TO AN ELEVATED PRESSURE LEVEL AT LEAST THREE-FOLD THAT OF THE ACETYLENE ABSORPTION; STRIPPING ACETYLENE FROM THE ACETYLENE ENRICHED SOLVENT; CHILLING THE STRIPPED DE-ACETYLENIZED GAS TO AN ELEVATED PERATURE LEVEL AT LEAST 15*C. BELOW THAT OF THE ACETYLENE ABSORPTION; ABSORBING ETHYLENE FROM THE COMPRESSED DE-ACETYLENIZED GAS BY CONTACT WITH THE CHILLED SOLVENT AT THE ELEVATED PRESSURE LEVEL; WARMING AND LOWERING THE PRESSURE OF THE ETHYLENEENRICHED SOLVENT TO ABOUT THE PRESSURE-TEMPERATURE CONDITIONS EMPLOYED FOR THE ACETYLENE ABSORPTION TO RELEASE ETHYLENE THEREFROM; AND THEN DIRECTLY CYCLING THE SO DE-ETHYLENIZED SOLVENT TO THE ACETYLENE ABSORPTION, THEREBY EMPLOYING FOR ACETYLENE ABSORPTION IN THE SOLVENT AND FOR ETHYLENE RELEASE FROM THE SOLVENT ESSENTIALLY THE SAME PRESSURE-TEMPERATURE CONDITIONS.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |