Patent US3299618A successfully refreshed from Google Patents.
US3299618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating acrylonitrile and acetonitrile
Assignee: Bayer AG
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Filing: 1963-12-18
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Granted: 1967-01-24
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Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Kunze Heinrich
- 👤 Hausweiler Arnold
- 👤 Scherhag Bernhard
- 👤 Haupt Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:51
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
PROCESS FOR SEPARATING ACRYLONITRILE AND ACETONITRILE FROM A GAS MIXTURE CONTAINING BOTH THESE COMPONENTS, WHICH COMPRISES SCRUBBING SUCH GAS MIXTURE WITH A FIRST WATER WASH TO ABSORB SELECTIVELY THEREBY IN SAID FIRST WATER WASH SUBSTANTIALLY ALL OF SAID ACETONITRILE WITHOUT ABSORBING SUBSTANTIALLY ANY OF SAID ACRYLONITRILE, AND SCRUBBING THE FIRST WASHED RESIDUAL GAS MIXTURE WITH A SECOND WATER WASH TO ABSORB THEREBY IN SAID SECOND WATER WASH SUBSTANTIALLY ALL OF SAID ACRYLONITRILE, RECOVERING THE ABSORBED ARCYLONITRILE FROM ONE PORTION OF SAID SECOND WATER WASH AND USING THE REMAINING PORTION OF SAID SECOND WATER WASH CONTAINING ABSORBED ACRYLONITRILE THEREIN AS SAID FIRST WATER WASH FOR INITIALLY SCRUBBING SAID GAS MIXTURE CONTAINING BOTH SAID COMPONENTS TO ACHIEVE THEREBY THE SELECTIVE ABSORPTION OF SAID ACETONITRILE THEREIN.
Claim 2
Dependent Claim
123 words
PROCESS FOR SEPARATING ACRYLONITRILE AND ACETONITRILE FROM A GAS MIXTURE CONTAINING BOTH THESE COMPONENTS, WHICH COMPRISES SCRUBBING SUCH GAS MIXTURE WITH A FIRST WATER WASH TO ABSORB SELECTIVELY THEREBY IN SAID FIRST WATER WASH SUBSTANTIALLY ALL OF SAID ACETONITRILE WITHOUT ABSORBING SUBSTANTIALLY ANY OF SAID ACRYLONITRILE, AND SCRUBBING THE FIRST WASHED RESIDUAL GAS MIXTURE WITH A SECOND WATER WASH TO ABSORB THEREBY IN SAID SECOND WATER WASH SUBSTANTIALLY ALL OF SAID ACRYLONITRILE, RECOVERING THE ABSORBED ARCYLONITRILE FROM ONE PORTION OF SAID SECOND WATER WASH AND USING THE REMAINING PORTION OF SAID SECOND WATER WASH CONTAINING ABSORBED ACRYLONITRILE THEREIN AS SAID FIRST WATER WASH FOR INITIALLY SCRUBBING SAID GAS MIXTURE CONTAINING BOTH SAID COMPONENTS TO ACHIEVE THEREBY THE SELECTIVE ABSORPTION OF SAID ACETONITRILE THEREIN.
References Cited (Backward Citations)
CA478772A
Cited
US2415662A
Cited
US2684979A
Cited
US2773088A
Cited
US3133957A
Cited
US3210399A
Cited
AT228188B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |