Patent US3293316A successfully refreshed from Google Patents.
US3293316A
Expired / Lapsed
US
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Butadiene purification
Assignee: Phillips Petroleum Co
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Filing: 1964-12-31
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Granted: 1966-12-20
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Harris A Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:29
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; C07C7/00; C07C7/005; C07C7/04; C07C7/05; C07C7/08; C07C7/148; C07C7/163; C07C7/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR RECOVERING BUTADIENE FROM A HYDROCARBON MIXTURE CONTAINING BUTADIENE, BUTENE-1 AND ACETYLENCES COMPRISING: REMOVING BUTENE-1 AS OVERHEAD IN AN EXTRACTIVE DISTILLATION ZONE BY SELECTIVELY ABSORBING BITADIENE AND ACETYLENES FROM SAID MIXTURE; REMOVING A CONCENTRATED BUTADIENE STREAM FROM THE RICH SOLVENT AS OVERHEAD IN A FIRST STRIPPING ZONE; REMOVING A CONCENTRATED ACETYLENES STREAM FROM THE RICH SOLVENT AS OVERHEAD IN A SECOND STRIPPING ZONE; SELECTIVELY HYDROGENATING SAID CONCENTRATED ACETYLENES STREAM IN A CATALYTIC ZONE AND RECOVERING SUBSTANTIALLY PURE BUTADIENE AS OVERHEAD IN A SEPARATION ZONE FROM THE EFFLUENT OF SAID CATALYTIC ZONE AND CONCENTRATED BUTADIENE STREAM.
Claim 2
Dependent Claim
97 words
A PROCESS FOR RECOVERING BUTADIENE FROM A HYDROCARBON MIXTURE CONTAINING BUTADIENE, BUTENE-1 AND ACETYLENCES COMPRISING: REMOVING BUTENE-1 AS OVERHEAD IN AN EXTRACTIVE DISTILLATION ZONE BY SELECTIVELY ABSORBING BITADIENE AND ACETYLENES FROM SAID MIXTURE; REMOVING A CONCENTRATED BUTADIENE STREAM FROM THE RICH SOLVENT AS OVERHEAD IN A FIRST STRIPPING ZONE; REMOVING A CONCENTRATED ACETYLENES STREAM FROM THE RICH SOLVENT AS OVERHEAD IN A SECOND STRIPPING ZONE; SELECTIVELY HYDROGENATING SAID CONCENTRATED ACETYLENES STREAM IN A CATALYTIC ZONE AND RECOVERING SUBSTANTIALLY PURE BUTADIENE AS OVERHEAD IN A SEPARATION ZONE FROM THE EFFLUENT OF SAID CATALYTIC ZONE AND CONCENTRATED BUTADIENE STREAM.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |