US2897238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the separation of carbonyl compounds
Assignee: Aschaffenburger Zellstoffwerke AG
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Filing: 1955-08-18
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Granted: 1959-07-28
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Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Toppel Otmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:12
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/79; B; B01; B01J; B01J39/00; B01J39/04; B01J39/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD FOR SEPARATING ALDEHYDRIC CARBONYL COMPOUNDS FROM SOLUTIONS CONTAINING THE SAME BY MEANS OF ION EXCHANGERS COMPRISING THE STEPS OF CHARGING A CATION EXCHANGER SELECTED FROM THE GROUP CONSISTING OF POROUS POLYMERIC SULFONIC ACID, POLYSTYRENE SULFONIC ACID, POLYMERIC PHENOL SULFONIC ACID, AND POLYMERIC CARBOXYLIC ACID TYPE CATION EXCHANGER, WITH HYDROGEN IONS AND THEN WITH A PARTIALLY DEHYDROGENEATED AMMONIA DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF HYDROXYL AMINE, HYDRAZINE, MINERAL ACID SALTS THEREOF, AND PHENYL HYDRAZINIUM CHLORIDE, THEREBY MAKING SAID CATION EXCHANGER SORPTIVE FOR ALDEHYDES AND CHARGINGTHE RESULTING CARBONYL-SORPTIVE EXCHANGER WITH A SOLUTION CONTAINING CARBONYL COMPOUNDS, AND ACIDICALLY ELUTING THE RESULTING ABSORBED ALDEHYDIC CARBONYL CPMPOUNDS FROM THE CATION EXCHANGER.
Claim 2
Independent Claim
109 words
A METHOD FOR SEPARATING ALDEHYDRIC CARBONYL COMPOUNDS FROM SOLUTIONS CONTAINING THE SAME BY MEANS OF ION EXCHANGERS COMPRISING THE STEPS OF CHARGING A CATION EXCHANGER SELECTED FROM THE GROUP CONSISTING OF POROUS POLYMERIC SULFONIC ACID, POLYSTYRENE SULFONIC ACID, POLYMERIC PHENOL SULFONIC ACID, AND POLYMERIC CARBOXYLIC ACID TYPE CATION EXCHANGER, WITH HYDROGEN IONS AND THEN WITH A PARTIALLY DEHYDROGENEATED AMMONIA DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF HYDROXYL AMINE, HYDRAZINE, MINERAL ACID SALTS THEREOF, AND PHENYL HYDRAZINIUM CHLORIDE, THEREBY MAKING SAID CATION EXCHANGER SORPTIVE FOR ALDEHYDES AND CHARGINGTHE RESULTING CARBONYL-SORPTIVE EXCHANGER WITH A SOLUTION CONTAINING CARBONYL COMPOUNDS, AND ACIDICALLY ELUTING THE RESULTING ABSORBED ALDEHYDIC CARBONYL CPMPOUNDS FROM THE CATION EXCHANGER.
References Cited (Backward Citations)
US2449364A
Cited
US2709710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |