Patent US2983656A successfully refreshed from Google Patents.
US2983656A
Expired / Lapsed
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Electrolytic method of purifying amine solutions
Assignee: ExxonMobil Oil Corp
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Filing: 1959-02-10
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Granted: 1961-05-09
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Expires: 1979-02-10
Abstract
No abstract record available.
Inventors
- 👤 Robert B Crean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:04
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A METHOD OF INCREASING THE PROPORTION OF FREE AMINE IN AN AQUEOUS AMINE SOLUTION CONTAMINATED WITH ACIDIC ANIONS WHICH INCLUDES PASSING SAID CONTAMINATED SOLUTION THROUGH A CATHODE COMPARTMENT OF AN ELECTROLYTIC CELL WHILE AN ANOLYTE LIQUID IS PASSED THROUGH AN ANODE COMPARTMENT OF SAID CELL, THE IMPROVEMENT COMPRISING: INTERPOSING BETWEEN SAID CATHODE COMPARTMENT AND SAID ANODE COMPARTMENT A PERMEABLE, WATER-RESISTANT DIAPHRAGM OF CELLULOSIC MATERIAL, AND CONTINUOUSLY ADDING A BASE TO SAID ANOLYTE LIQUID IN AMOUNT SUFFICIENT TO MAINTAIN THE HYDROGEN-ION CONCENTRATION OF SAID ANOLYTE LIQUID WITHIN SAID ANODE COMPARTMENT BETWEEN THE LIMITS PH 6.0 AND PH 10.0.
Claim 2
Dependent Claim
98 words
IN A METHOD OF INCREASING THE PROPORTION OF FREE AMINE IN AN AQUEOUS AMINE SOLUTION CONTAMINATED WITH ACIDIC ANIONS WHICH INCLUDES PASSING SAID CONTAMINATED SOLUTION THROUGH A CATHODE COMPARTMENT OF AN ELECTROLYTIC CELL WHILE AN ANOLYTE LIQUID IS PASSED THROUGH AN ANODE COMPARTMENT OF SAID CELL, THE IMPROVEMENT COMPRISING: INTERPOSING BETWEEN SAID CATHODE COMPARTMENT AND SAID ANODE COMPARTMENT A PERMEABLE, WATER-RESISTANT DIAPHRAGM OF CELLULOSIC MATERIAL, AND CONTINUOUSLY ADDING A BASE TO SAID ANOLYTE LIQUID IN AMOUNT SUFFICIENT TO MAINTAIN THE HYDROGEN-ION CONCENTRATION OF SAID ANOLYTE LIQUID WITHIN SAID ANODE COMPARTMENT BETWEEN THE LIMITS PH 6.0 AND PH 10.0.
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |