US3080301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of acrylonitrile having a high degree of purity
Assignee: Sicedison SpA
•
Filing: 1960-02-08
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Granted: 1963-03-05
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Expires: 1980-02-08
Abstract
No abstract record available.
Inventors
- 👤 Fontana Giuseppe
- 👤 Federici Giuseppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:17
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34; Y; Y10; Y10S; Y10S203/00; Y10S203/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A CONTINUOUS DISTILLATION PROCESS FOR THE SEPARATION OF ACRYLONITRILE FROM METHYLVINYLKETONE IMPURITIES, WHICH PROCESS COMPRISES AZEOTROPICALLY DISTILLING IN A DISTILLATION ZONE A CRUDE AQUEOUS SOLUTION CONTAINING ABOUT 10 TO 30 GRAMS PER LITER OF ACRYLONITRILE, 5-1000 PARTS PER MILLION OF METHYLVINYLKETONE, AND AT LEAST 0.4 GRAM PER LITER OF HYDROCYANIC ACID; WITHDRAWING AN AZEOTROPIC MIXTURE COMPRISING WATER AND ACRYLONITRILE FROM SAID DISTILLATION ZONE; CONDENSING SAID AZEOTROPIC MIXTURE, AND SEPARATING SAID MIXTURE INTO A WATER PHASE, AND AN ACRYLONITRILE PRODUCT PHASE CONTAINING LESS THAN 100 PARTS PER MILLION OF METHYLVINYLKETONE.
Claim 2
Dependent Claim
89 words
A CONTINUOUS DISTILLATION PROCESS FOR THE SEPARATION OF ACRYLONITRILE FROM METHYLVINYLKETONE IMPURITIES, WHICH PROCESS COMPRISES AZEOTROPICALLY DISTILLING IN A DISTILLATION ZONE A CRUDE AQUEOUS SOLUTION CONTAINING ABOUT 10 TO 30 GRAMS PER LITER OF ACRYLONITRILE, 5-1000 PARTS PER MILLION OF METHYLVINYLKETONE, AND AT LEAST 0.4 GRAM PER LITER OF HYDROCYANIC ACID; WITHDRAWING AN AZEOTROPIC MIXTURE COMPRISING WATER AND ACRYLONITRILE FROM SAID DISTILLATION ZONE; CONDENSING SAID AZEOTROPIC MIXTURE, AND SEPARATING SAID MIXTURE INTO A WATER PHASE, AND AN ACRYLONITRILE PRODUCT PHASE CONTAINING LESS THAN 100 PARTS PER MILLION OF METHYLVINYLKETONE.
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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |