US2811420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorine dioxide generation
Assignee: Occidental Chemical Corp
•
Filing: 1954-11-17
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Granted: 1957-10-29
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Expires: 1974-11-17
Abstract
No abstract record available.
Inventors
- 👤 John C Pernert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:35
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/02; C01B11/022; C01B11/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE AND THE ECONOMIC RECOVERY OF BY-PRODUCTS WHICH COMPRISES: PROVIDING AN AQUEOUS SOLUTION OF SULFURIC ACID; INTRODUCING A REDUCING AGENT AND AN AQUEOUS SOLUTION OF CHLORIC ACID INTO SAID SULFURIC ACID THEREBY TO PROVIDE A REACTION MIXTURE; SIMULTANEOUSLY REMOVING CHLORINE DIOXIDE FORMED, CONTINUOUSLY REMOVING A PORTION OF SAID REACTION MIXTURE IN AN AMOUNT APPROXIMATELY EQUAL TO THE INTRODUCTION OF REACTANTS INTO SAID REACTION MIXTURE; DISSOLVING SODIUM CHLORATE IN SAID REMOVED PORTION AND COOLING THE RESULTING SOLUTION TO A TEMPERATURE BELOW MINUS FIFTEEN DEGREES CENTIGRADE THEREBY FORMING A MOTHER LIQUOR OF CHLORIC ACID AND CRYSTALS OF HYDRATED SODIUM SULFATE; SEPARATING SAID CRYSTALS; AND, RETURINING MOTHER LIQUOR TO SAID REACTION MIXTURE.
Claim 2
Dependent Claim
117 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE AND THE ECONOMIC RECOVERY OF BY-PRODUCTS WHICH COMPRISES: PROVIDING AN AQUEOUS SOLUTION OF SULFURIC ACID; INTRODUCING A REDUCING AGENT AND AN AQUEOUS SOLUTION OF CHLORIC ACID INTO SAID SULFURIC ACID THEREBY TO PROVIDE A REACTION MIXTURE; SIMULTANEOUSLY REMOVING CHLORINE DIOXIDE FORMED, CONTINUOUSLY REMOVING A PORTION OF SAID REACTION MIXTURE IN AN AMOUNT APPROXIMATELY EQUAL TO THE INTRODUCTION OF REACTANTS INTO SAID REACTION MIXTURE; DISSOLVING SODIUM CHLORATE IN SAID REMOVED PORTION AND COOLING THE RESULTING SOLUTION TO A TEMPERATURE BELOW MINUS FIFTEEN DEGREES CENTIGRADE THEREBY FORMING A MOTHER LIQUOR OF CHLORIC ACID AND CRYSTALS OF HYDRATED SODIUM SULFATE; SEPARATING SAID CRYSTALS; AND, RETURINING MOTHER LIQUOR TO SAID REACTION MIXTURE.
References Cited (Backward Citations)
US2332181A
Cited
US2376935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |