US3082271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-methyl pyrrolidone for the separation of olefins from hydrocarbon mixtures
Assignee: BASF SE
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Filing: 1960-04-11
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Granted: 1963-03-19
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Expires: 1980-04-11
Abstract
No abstract record available.
Inventors
- 👤 Weitz Hans-Martin
- 👤 Lorenz Lothar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:23
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR SEPARATING OLEFINS FROM PARAFFINS BY THE USE OF A SELECTIVE SOLVENT WHICH COMPRISES: CONTACTING A MIXTURE CONSISTING ESSENTIALLY OF OLEFINS CONTAINING FROM 3 TO 12 CARBON ATOMS AND PARAFFINS CONTAINING FRO 3 TO 12 CARBON ATOMS WITH N-METHYLPYRROLIDONE IN THE PRESENCE OF FROM 0 TO 15% WATER BY WEIGHT BASED ON THE WEIGHT OF N-METHYLPYRROLIDONE, WHEREBY SAID OLEFINS ARE SELECTIVELY DISSOLVED IN SAID N-METHYLPYRROLIDONE, SEPARATING THE N-METHYLPYRROLIDONE SOLUTION ROM SAID PARAFFINS, AND THEREAFTER HEATING SAID N-METHYLPYRROLIDONE SOLUTION TO REMOVE THE GASEOUS OLEFINS FROM SAID SOLUTION.
Claim 2
Dependent Claim
88 words
A PROCESS FOR SEPARATING OLEFINS FROM PARAFFINS BY THE USE OF A SELECTIVE SOLVENT WHICH COMPRISES: CONTACTING A MIXTURE CONSISTING ESSENTIALLY OF OLEFINS CONTAINING FROM 3 TO 12 CARBON ATOMS AND PARAFFINS CONTAINING FRO 3 TO 12 CARBON ATOMS WITH N-METHYLPYRROLIDONE IN THE PRESENCE OF FROM 0 TO 15% WATER BY WEIGHT BASED ON THE WEIGHT OF N-METHYLPYRROLIDONE, WHEREBY SAID OLEFINS ARE SELECTIVELY DISSOLVED IN SAID N-METHYLPYRROLIDONE, SEPARATING THE N-METHYLPYRROLIDONE SOLUTION ROM SAID PARAFFINS, AND THEREAFTER HEATING SAID N-METHYLPYRROLIDONE SOLUTION TO REMOVE THE GASEOUS OLEFINS FROM SAID SOLUTION.
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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |