US3766038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cycloalkanone oximes
Assignee: BASF SE
•
Filing: 1971-12-15
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Granted: 1973-10-16
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Expires: 1991-12-15
Abstract
Abstract A process for the production of cycloalkanone oximes by reaction of cycloalkanones with hydroxylammonium salts or mixtures thereof with ammonium salts and acids in aqueous solution. The free and combined acid is removed from the mixtures by electrodialysis before, during or after the oximation. The reaction of the cycloalkanone to the oxime is preferably carried out in the cathode chamber of an electrodialysis cell. Complete oximation of the cycloalkanone is achieved.
Inventors
- 👤 F Beck
- 👤 G Wunsch
- 👤 H Fuchs
- 👤 K Kahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:12
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D2311/00; B01D2311/26; B01D2311/2684
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
21 words
A process as claimed in claim 1 wherein the free and combined acid is removed before the oximation process by electrodialysis.
Claim 2
Dependent Claim
21 words
A process as claimed in claim 1 wherein the free and combined acid is removed during the oximation process by electrodialysis.
Claim 3
Dependent Claim
31 words
A process as set forth in claim 3 wherein the reaction is carried out in the cathode chamber of an electrodialysis cell which contains an anion exhange membrane as a diaphragm.
Claim 4
Dependent Claim
56 words
A process as set forth in claim 3 wherein electrolysis of the reaction mixture is continued until equilibrium between free oxime and the salt of the oxime has been set up, with or without extraction of the free oxime, and the aqueous phase is further treated in the electrodialysis cell until the cycloalkanone is completely reacted.
Claim 5
Dependent Claim
19 words
A process as set forth in claim 3 wherein a nickel cathode is used which has a smooth surface.
Claim 6
Dependent Claim
21 words
A process as set forth in claim 3 wherein a chromium nickel steel cathode is used which has a smooth surface.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |