Patent US3833710A successfully refreshed from Google Patents.
US3833710A
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US
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Process for purifying a gas containing oxygen and sulfur compounds
Assignee: IFP Energies nouvelles
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Filing: 1972-06-07
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Granted: 1974-09-03
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Expires: 1992-06-07
Abstract
Abstract THE PURIFACTION PROCESS, WHICH MAY BE USED FOR REMOVING SULFUR DIOXIDE FROM INDUSTRIAL FUMES, COMPRISES SEVERAL INTERCONNECTED STEPS: ADSORPTION IN A SOLUTION OF ALKALI METAL OR AMMONIUM SULFITE, CONTACT OF THE LATTER WITH A WEAK ANION EXCHANGER, FOR EXAMPLE AN AMINE OR A POLYMERIC AMINE, PERIODIC REGERNATION OF THE EXHANGER BY MEANS OF AMONIA, RECYCLING OF THE ABSORPTION SOLUTION AND CONVERSION OF THE RECOVERED AMONIUM SULFITE TO SULFUR. THE SO DEFINED PROCESS HAS LOW POWER REQUIREMENTS AND YIELDS SULFUR PRACTIVALLY FREE OF BY-PRODUCTS.
Inventors
- 👤 A Deschamps
- 👤 C Dezael
- 👤 P Renault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:04
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |