US2620260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making chlorine dioxide
Assignee: Mo och Domsjo AB
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Filing: 1948-01-08
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Granted: 1952-12-02
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Expires: 1968-01-08
Abstract
No abstract record available.
Inventors
- 👤 Ekman Sven Ulf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:06
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/02; C01B11/022; C01B11/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE PROCESS OF GENERATING CHLORINE DIOXIDE WHICH COMPRISES REACTING SULFUR DIOXIDE WITH AN ACID SOLUTION OF A CHLORATE, SAID SOLUTION BEING SUBSTANTIALLY SATURATED WITH THE SULFATE OF THE CATION OF SAID CHLORATE AT THE REACTION TEMPERATURE, WHEREBY SULFATE FORMED DURING THE REACTION WILL CRYSTALLIZE OUT SPONTANEOUSLY, CIRCULATING THE REACTION SOLUTION WITH UNREACTED CHLORATE HAVING A CHLORATE CONCENTRATION OF THE ORDER OF 3 MOLS PER LITRE FROM A VESSEL IN WHICH THE REACTION BETWEEN THE SULFUR DIOXIDE AND THE CHLORATE TAKES PLACE AND BACK TO SAID VESSEL THROUGH A CRYSTAL SEPARATOR FOR REMOVING THE SULFATE CRYSTALS FORMED, AND ADDING CHLORATE TO THE CYCLE IN AN AMOUNT SUBSTANTIALLY EQUIVALENT TO THAT COMSUMED IN THE REACTION VESSEL TO CONSTANTLY MAINTAIN THE CHLORATE CONCENTRATION AT A HIGH VALUE AND SECURE A HIGH YIELD AND A HIGH RATE OF FORMATION OF CHLORINE DIOXIDE.
Claim 2
Dependent Claim
138 words
THE PROCESS OF GENERATING CHLORINE DIOXIDE WHICH COMPRISES REACTING SULFUR DIOXIDE WITH AN ACID SOLUTION OF A CHLORATE, SAID SOLUTION BEING SUBSTANTIALLY SATURATED WITH THE SULFATE OF THE CATION OF SAID CHLORATE AT THE REACTION TEMPERATURE, WHEREBY SULFATE FORMED DURING THE REACTION WILL CRYSTALLIZE OUT SPONTANEOUSLY, CIRCULATING THE REACTION SOLUTION WITH UNREACTED CHLORATE HAVING A CHLORATE CONCENTRATION OF THE ORDER OF 3 MOLS PER LITRE FROM A VESSEL IN WHICH THE REACTION BETWEEN THE SULFUR DIOXIDE AND THE CHLORATE TAKES PLACE AND BACK TO SAID VESSEL THROUGH A CRYSTAL SEPARATOR FOR REMOVING THE SULFATE CRYSTALS FORMED, AND ADDING CHLORATE TO THE CYCLE IN AN AMOUNT SUBSTANTIALLY EQUIVALENT TO THAT COMSUMED IN THE REACTION VESSEL TO CONSTANTLY MAINTAIN THE CHLORATE CONCENTRATION AT A HIGH VALUE AND SECURE A HIGH YIELD AND A HIGH RATE OF FORMATION OF CHLORINE DIOXIDE.
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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |