US2703331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating adipic acid precursors
Assignee: EIDP Inc
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Filing: 1953-11-06
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Granted: 1955-03-01
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Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Martin Goldbeck
- 👤 Franklin C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:01
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/313; C07C29/00; C07C29/48; C07C29/50; C07C51/316; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN THE PROCESS FOR MANUFACTURING ADIPIC ACID BY OXIDIZING CYCLOHEXANE IN THE LIQUID PHASE TO PRIMARY OXIDATION PRODUCTS COMPRISING CHIEFLY CYCLOHEXANOL AND CYCLOHEXANONE, WITH MOLECULAR OXYGEN, FOLLOWED BY OXIDATION OF PRIMARY PRODUCTS TO ADIPIC ACID BY MEANS OF NITRIC ACID, THE IMPROVEMENT WHICH CONSISTS IN EMPLOYING AS THE OXITAINED BY INJECTING WATER INTO THE EFFLUENT FROM A LIQUID PHASE CYCLOHEXANE OXIDATION REACTION VESSEL, SEPARATING THE HYDROCARBON AND AQUEOUS PHASES IN THE RESULTING MIXTURE, REMOVING STEAM DISTILLABLE OIL FROM SAID AQUEOUS PHASE, ADDING SAID OIL TO THE SAID HYDROCARBON PHASE STRIPPING SUBSTANTIALLY ALL OF THE HYDROCARBON FROM THE RESULTING MIXTURE, AND EXHAUSTIVELY STEAM DISTILLING THE RESULTING RESIDUE WHEREBY AN OIL WHICH IS SUITABLE FOR USE AS THE OXIDIZABLE FEED TO THE NITRIC ACID OXIDIZER IS OBTAINED.
Claim 2
Dependent Claim
125 words
IN THE PROCESS FOR MANUFACTURING ADIPIC ACID BY OXIDIZING CYCLOHEXANE IN THE LIQUID PHASE TO PRIMARY OXIDATION PRODUCTS COMPRISING CHIEFLY CYCLOHEXANOL AND CYCLOHEXANONE, WITH MOLECULAR OXYGEN, FOLLOWED BY OXIDATION OF PRIMARY PRODUCTS TO ADIPIC ACID BY MEANS OF NITRIC ACID, THE IMPROVEMENT WHICH CONSISTS IN EMPLOYING AS THE OXITAINED BY INJECTING WATER INTO THE EFFLUENT FROM A LIQUID PHASE CYCLOHEXANE OXIDATION REACTION VESSEL, SEPARATING THE HYDROCARBON AND AQUEOUS PHASES IN THE RESULTING MIXTURE, REMOVING STEAM DISTILLABLE OIL FROM SAID AQUEOUS PHASE, ADDING SAID OIL TO THE SAID HYDROCARBON PHASE STRIPPING SUBSTANTIALLY ALL OF THE HYDROCARBON FROM THE RESULTING MIXTURE, AND EXHAUSTIVELY STEAM DISTILLING THE RESULTING RESIDUE WHEREBY AN OIL WHICH IS SUITABLE FOR USE AS THE OXIDIZABLE FEED TO THE NITRIC ACID OXIDIZER IS OBTAINED.
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) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |