US3051630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of acrylonitrile
Assignee: Distillers Co Yeast Ltd
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Filing: 1959-01-13
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Granted: 1962-08-28
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Expires: 1979-01-13
Abstract
No abstract record available.
Inventors
- 👤 Hadley David James
- 👤 Bream John Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:27
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
104 words
THE PROCESS WHICH COMPRISES DISTILLING A MIXTURE CONSISTING SUBSTANTIALLY OF ACRYLONITRILE, WATER AND 0.3 0.5% ACROLEIN AT A TEMPEATURE TO DRIVE OFF A FRACTION CONSISTING OF ALL OF THE WATER AND ACROLEIN TOGETHER WITH SUBSTANTIAL AMOUNTS OF ACRYLONITRILE, WITHDRAWING SAID FRACTION AS AN OVERHEAD FRACTION, REFLUXING SAID FRACTION, PASSING A PORTION OF THE REFLUX TO THE DISTILLING PHASE, AND WASHING ANOTHER PORTION WITH SUFFICIENT WATER TO FORM AN AQUEOUS PHASE CONTAINING ACROLEIN AND ONLY A SMALL PROPORTION OF ACRYLONITRILE AND A WATER-SATURATED ACRYLONITRILE PHASE, SEPARATING AND INTRODUCING THE ACRYLOMITRILE PHASE TO THE DISTILLING PHASE, AND WITHDRAWING AS THE BOTTOMS FRACTION HIGHLY PURE, DRY ACRYLOMITRILE.
Claim 2
Dependent Claim
104 words
THE PROCESS WHICH COMPRISES DISTILLING A MIXTURE CONSISTING SUBSTANTIALLY OF ACRYLONITRILE, WATER AND 0.3 0.5% ACROLEIN AT A TEMPEATURE TO DRIVE OFF A FRACTION CONSISTING OF ALL OF THE WATER AND ACROLEIN TOGETHER WITH SUBSTANTIAL AMOUNTS OF ACRYLONITRILE, WITHDRAWING SAID FRACTION AS AN OVERHEAD FRACTION, REFLUXING SAID FRACTION, PASSING A PORTION OF THE REFLUX TO THE DISTILLING PHASE, AND WASHING ANOTHER PORTION WITH SUFFICIENT WATER TO FORM AN AQUEOUS PHASE CONTAINING ACROLEIN AND ONLY A SMALL PROPORTION OF ACRYLONITRILE AND A WATER-SATURATED ACRYLONITRILE PHASE, SEPARATING AND INTRODUCING THE ACRYLOMITRILE PHASE TO THE DISTILLING PHASE, AND WITHDRAWING AS THE BOTTOMS FRACTION HIGHLY PURE, DRY ACRYLOMITRILE.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |