US3152866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic process for converting hydrogen chloride to elemental chlorine and sulfur dioxide to sulfuric acid
Assignee: EIDP Inc
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Filing: 1961-02-02
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Granted: 1964-10-13
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Expires: 1981-02-02
Abstract
No abstract record available.
Inventors
- 👤 Kamlet Edna Yadven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:45
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A CYCLIC PROCESS FOR THE CONVERSION OF HYDROGEN CHLORIDE AND SULFUR DIOXIDE TO CHLORINE AND SULFURIC ACID WHICH COMPRISES THE STEPS OF (A) OXIDIZING NITROSYL CHORIDE WITH AN OXYGEN-CONTAINING GAS TO OBTAIN A MIXTURE OF NITROGEN DIOXIDE AND CHLORINE; (B) REACTING THE SAID MIXTURE OF NITROGEN DIOXIDE AND CHLORINE WITH SULFURIC ACID, WHEREBY THE CHLORINE IS RECOVERED AND THE NITROGEN DIOXIDE REACTS WITH THE SULFURIC ACID TO FORM A MIXTURE OF NITROSYLSULFURIC ACID AND NITRIC ACID IN SULFURIC ACID; (C) REACTING THE SAID MIXTURE OF NITROSULSULFURIC ACID AND NITRIC ACID IN SULFURIC ACID WITH SULFUR DIOXIDE IN QUANTITY SUFFICIENT TO CONVERT HE NITRIC ACID IN SAID MIXTURE TO NITROSYLSULFURIC ACID; (D) REACTING THE SAID NITROSYLSULFURIC ACID IN SULFURIC ACID WITH HYDROGEN CHLORIDE TO FORM NITROSYL CHLORIDE WHICH IS RE-
Claim 2
Dependent Claim
129 words
A CYCLIC PROCESS FOR THE CONVERSION OF HYDROGEN CHLORIDE AND SULFUR DIOXIDE TO CHLORINE AND SULFURIC ACID WHICH COMPRISES THE STEPS OF (A) OXIDIZING NITROSYL CHORIDE WITH AN OXYGEN-CONTAINING GAS TO OBTAIN A MIXTURE OF NITROGEN DIOXIDE AND CHLORINE; (B) REACTING THE SAID MIXTURE OF NITROGEN DIOXIDE AND CHLORINE WITH SULFURIC ACID, WHEREBY THE CHLORINE IS RECOVERED AND THE NITROGEN DIOXIDE REACTS WITH THE SULFURIC ACID TO FORM A MIXTURE OF NITROSYLSULFURIC ACID AND NITRIC ACID IN SULFURIC ACID; (C) REACTING THE SAID MIXTURE OF NITROSULSULFURIC ACID AND NITRIC ACID IN SULFURIC ACID WITH SULFUR DIOXIDE IN QUANTITY SUFFICIENT TO CONVERT HE NITRIC ACID IN SAID MIXTURE TO NITROSYLSULFURIC ACID; (D) REACTING THE SAID NITROSYLSULFURIC ACID IN SULFURIC ACID WITH HYDROGEN CHLORIDE TO FORM NITROSYL CHLORIDE WHICH IS RE-
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |