US3267131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product separation and recovery in adiponitrile manufacture
Assignee: Monsanto Co
•
Filing: 1964-04-27
•
Granted: 1966-08-16
•
Expires: 1984-04-27
Abstract
No abstract record available.
Inventors
- 👤 Charles R Campbell
- 👤 Johnson Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:20
CPC Classifications
C; C07; C07C; C07C255/00; C25; C25B; C25B3/00; C25B3/01; C25B3/09; C25B3/20; C25B3/29; C25B3/295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD FOR THE SELECTIVE SEPARATION OF ADIPONITRILE AND QUATERNARY AMMONIUM SALT CONTAINED IN THE CATHODE EFFLUENT FROM THE ELECTROHYDRODIMERIZATION OF ACRYLONITRILE TO ADIPONITRILE COMPRISING DILUTING SAID EFFLUENT WITH ACRYLONITRILE AND WATER TO PROVIDE AN ACRYLONITRILE PHASE AND AN AQUEOUS PHASE WHILE EXTRACTING SAID ACRYLONITRILE PHASE IN COUNTERCURRENT MULTISTAGE FASHION WITH SAID WATER AND EXTRACTING SAID AQUEOUS PHASE IN COUNTERCURRENT MULTISTAGE FASHION WITH ACRYLONITRILE TO PRODUCE AN AQUEOUS EXTRACT PHASE CONTAINING QUATERNARY AMMONIUM SALT SUBSTANTIALLY FREE OF REACTION PRODUCTS AND TO PRODUCE AN ACRYLONITRILE EXTRACT PHASE SUBSTANTIALLY CONTANING THE REACTION PRODUCTS AND SUBSTANTIALLY FREE OF QUATERNARY AMMONIUM SALT.
Claim 2
Independent Claim
98 words
A METHOD FOR THE SELECTIVE SEPARATION OF ADIPONITRILE AND QUATERNARY AMMONIUM SALT CONTAINED IN THE CATHODE EFFLUENT FROM THE ELECTROHYDRODIMERIZATION OF ACRYLONITRILE TO ADIPONITRILE COMPRISING DILUTING SAID EFFLUENT WITH ACRYLONITRILE AND WATER TO PROVIDE AN ACRYLONITRILE PHASE AND AN AQUEOUS PHASE WHILE EXTRACTING SAID ACRYLONITRILE PHASE IN COUNTERCURRENT MULTISTAGE FASHION WITH SAID WATER AND EXTRACTING SAID AQUEOUS PHASE IN COUNTERCURRENT MULTISTAGE FASHION WITH ACRYLONITRILE TO PRODUCE AN AQUEOUS EXTRACT PHASE CONTAINING QUATERNARY AMMONIUM SALT SUBSTANTIALLY FREE OF REACTION PRODUCTS AND TO PRODUCE AN ACRYLONITRILE EXTRACT PHASE SUBSTANTIALLY CONTANING THE REACTION PRODUCTS AND SUBSTANTIALLY FREE OF QUATERNARY AMMONIUM SALT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |