US3404952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of chlorine dioxide
Assignee: Chemech Engineering Ltd
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Filing: 1966-06-20
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Granted: 1968-10-08
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Expires: 1986-06-20
Abstract
No abstract record available.
Inventors
- 👤 Gothe O Westerlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:32
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE WHICH COMPRISES: (A) EFFECTING ELECTROLYSIS OF AN AQUEOUS SOLUTION OF A METAL CHLORIDE WHEREBY TO FORM (I) AN AQUEOUS SOLUTION OF A METAL CHLORATE, AND (II) GASEOUS HYDROGEN; (B) REACTING THE GASEOUS HYDROGEN (A)(II) WITH GASEOUS CHLORINE WHEREBY TO FORM (III) GASEOUS HYDROGEN CHLORIDE; (C) REACTING THE AQUEOUS SOLUTION OF METAL CHLORATE (A) (I) WITH THE GASEOUS HYDROGEN (B) (III) WHEREBY TO FORM (IV) AN AQUEOUS SOLUTION OF METAL CHLORIDE, WHICH IS RECYCLED TO STEP (A), AND (V) AN AQUEOUS SOLUTION OF CHLORIC ACID, AND (D) REACTING THE AQUEOUS SOLUTION OF CHLORIC ACID (C) (V) WITH THE GASEOUS HYDROGEN CHLORIDE (B) (III) WHEREBY TO FORM (VI) CHLORINE DIOXIDE, WHICH IS RECOVERED; (VII) WATER, AND (VIII) GASEOUS CHLORINE WHICH IS RECYCLED TO STEP (B).
Claim 2
Dependent Claim
132 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE WHICH COMPRISES: (A) EFFECTING ELECTROLYSIS OF AN AQUEOUS SOLUTION OF A METAL CHLORIDE WHEREBY TO FORM (I) AN AQUEOUS SOLUTION OF A METAL CHLORATE, AND (II) GASEOUS HYDROGEN; (B) REACTING THE GASEOUS HYDROGEN (A)(II) WITH GASEOUS CHLORINE WHEREBY TO FORM (III) GASEOUS HYDROGEN CHLORIDE; (C) REACTING THE AQUEOUS SOLUTION OF METAL CHLORATE (A) (I) WITH THE GASEOUS HYDROGEN (B) (III) WHEREBY TO FORM (IV) AN AQUEOUS SOLUTION OF METAL CHLORIDE, WHICH IS RECYCLED TO STEP (A), AND (V) AN AQUEOUS SOLUTION OF CHLORIC ACID, AND (D) REACTING THE AQUEOUS SOLUTION OF CHLORIC ACID (C) (V) WITH THE GASEOUS HYDROGEN CHLORIDE (B) (III) WHEREBY TO FORM (VI) CHLORINE DIOXIDE, WHICH IS RECOVERED; (VII) WATER, AND (VIII) GASEOUS CHLORINE WHICH IS RECYCLED TO STEP (B).
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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) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |