US3592850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of formate from thiosulfate
Assignee: C0NSOLIDATION COAL Co
•
Filing: 1970-06-17
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Granted: 1971-07-13
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Expires: 1990-06-17
Abstract
Abstract ALKALI METAL FORMATE IS MADE FROM ALKALI METAL THIOSULFATE BY THE FOLLOWING THREE STEPS: (1) REDUCTION: 4MCOOH+M2S2O3+H2O=4MHCO3+2MSH (2) STRIPPING:D MHCO3+MSH=M2CHO3+H2S CO2+H2O+MSH=MHCO3+H2S (3) FORMATE SYNTHESIS: M2CO3+2CO+H2O= 2MCOOH+CO2 M2CO3+CO+H2=2MCOOH WHERE M IS EITHER SODIUM OR POTASSIUM. THE FOREGOING PROCESS IS USEFUL IN CONNECTION WITH THE ABSORPTION OF SULFUR DIOXIDE FROM FLUE GAS BY ALKALI METAL FORMATE AT TEMPERATURES ABOVE 140*F. TO FORM THE CORRESPONDING THIOSULFATE.
Inventors
- 👤 Nestor J Mazzocco
- 👤 Everett Gorin
- 👤 Paul M Yavorsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:29
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/005; C07C; C07C51/00; C07C51/10
Claims Analysis
Total Claims: 0
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |