Patent US1933105A successfully refreshed from Google Patents.
Patent US2649472A successfully refreshed from Google Patents.
US2649472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing acrylonitrile
Assignee: Monsanto Chemicals Ltd
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Filing: 1950-08-28
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Granted: 1953-08-18
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Expires: 1970-08-28
Abstract
No abstract record available.
Inventors
- 👤 Gordon H Lovett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:44
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE PROCESS WHICH COMPRISES PARTIALLY CONDENSING A GASEOUS MIXTURE OF ACRYLONITRILE CONTAINING CHLOROBUTADINE, MONOVINYL ACETYLENE, DIVINYL ACETYLENE, AND WATER TO OBTAIN A LIQUID CONDENSATE COMPOSED OF AN ORGANIC PHASE AND A WATER PHASE, ADDING WATER TO SAID ORGANIC PHASE TO DISSOLVE ACRYLONITRILE, SEPARATING UNDISSOLVED CHLOROBUTADIENE, MONOVINYL ACETYLENE, AND DIVINYL ACETYLENE FROM THE COMBINED WATER SOLUTION OF ACRYLONITRILE, COMBINING THE SAID WATER SOLUTION OF ACRYLONITRILE WITH THE UNCONDENSED PORTION FO THE AFOREMENTIONED GAS MIXTURE, CONTACTING THE COMBINED SOLUTION WITH GASEOUS ACETVLENE, WHEREBY RESIDUAL CHLOROBUTADIENE, MONOVINYL ACETYLENE, AND DIVINYL ACETYLENE PRESENT IN SAID SOLUTION ARE TRANSFERRED TO THE GAS PHASE, AND A WATER SOLUTION OF ACRYLONITRILE SUBSTANTIALLY FREE OF CHLOROBUTADIENE, MONOVINYL ACETYLENE, AND DIVINYL ACETYLENE IS OBTAINED.
Claim 2
Dependent Claim
115 words
THE PROCESS WHICH COMPRISES PARTIALLY CONDENSING A GASEOUS MIXTURE OF ACRYLONITRILE CONTAINING CHLOROBUTADINE, MONOVINYL ACETYLENE, DIVINYL ACETYLENE, AND WATER TO OBTAIN A LIQUID CONDENSATE COMPOSED OF AN ORGANIC PHASE AND A WATER PHASE, ADDING WATER TO SAID ORGANIC PHASE TO DISSOLVE ACRYLONITRILE, SEPARATING UNDISSOLVED CHLOROBUTADIENE, MONOVINYL ACETYLENE, AND DIVINYL ACETYLENE FROM THE COMBINED WATER SOLUTION OF ACRYLONITRILE, COMBINING THE SAID WATER SOLUTION OF ACRYLONITRILE WITH THE UNCONDENSED PORTION FO THE AFOREMENTIONED GAS MIXTURE, CONTACTING THE COMBINED SOLUTION WITH GASEOUS ACETVLENE, WHEREBY RESIDUAL CHLOROBUTADIENE, MONOVINYL ACETYLENE, AND DIVINYL ACETYLENE PRESENT IN SAID SOLUTION ARE TRANSFERRED TO THE GAS PHASE, AND A WATER SOLUTION OF ACRYLONITRILE SUBSTANTIALLY FREE OF CHLOROBUTADIENE, MONOVINYL ACETYLENE, AND DIVINYL ACETYLENE IS OBTAINED.
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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |