Patent US3199949A successfully refreshed from Google Patents.
US3199949A
Expired / Lapsed
US
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Process control for hypochlorite production
Assignee: Solvay SA
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Filing: 1962-07-10
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Granted: 1965-08-10
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Clerbois Francois
- 👤 Antoine Pol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:45
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/04; C01B11/06; C01B11/062; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2509; Y10T436/00; Y10T436/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN A PROCESS FOR THE PRODUCTION OF SODIUM HYPOCHLORITE FROM A SOLUTION OF CAUSTIC SODA AND A CURRENT OF GASEOUS CHLORINE IN A CHLORINATOR HAVING INLET AND DISCHARGE CONDUITS WHEREIN THE CONCENTRATIONS AND AMOUNTS OF THE MIXTURE OF SAID SODIUM HYPOCHLORITE, CAUSTIC SODA AND GASEOUS CHLORINE VARY WITH TIME AND SAID AMOUNTS OF CAUSTIC SODA AND GASEOUS CHLORINE ARE REGULATED TO MAINTAIN A SLIGHT ALKALINITY TO PREVENT DECOMPOSITION OF SAID SODIUM HYPOCHLORITE, SAID REGULATION BEING PERFORMED BY MEASUREMENTS OF THE REDOX POTENTIAL OF SAID MIXTURE, THE IMPROVEMENT COMPRISING MEASURING SAID REDOX PO-/ TENTIAL IN AT LEAST ONE OF SAID CHLORINATOR AND SAID ILET AND DISCHARGE CONDUITS, CONVERTING SAID REDOX POTENTIAL INTO AN IMPULSE CORRESPONDING TO THE FIRST DERIVATIVE OF SAID REDOX POTENTIAL RELATIVE TO TIME AND REGULATING BY SAID IMPULSE THE ADDITION OF AT LEAST ONE OF SAID CAUSTIC SODA AND CHLORINE, SAID ADDITION BEING MADE IN THE DIRECTION OF MAINTAINING SUBSTANTIALLY CONSTANT SAID FIRST DERIVATIVE OF SAID REDOX POTENTIAL.
Claim 2
Dependent Claim
160 words
IN A PROCESS FOR THE PRODUCTION OF SODIUM HYPOCHLORITE FROM A SOLUTION OF CAUSTIC SODA AND A CURRENT OF GASEOUS CHLORINE IN A CHLORINATOR HAVING INLET AND DISCHARGE CONDUITS WHEREIN THE CONCENTRATIONS AND AMOUNTS OF THE MIXTURE OF SAID SODIUM HYPOCHLORITE, CAUSTIC SODA AND GASEOUS CHLORINE VARY WITH TIME AND SAID AMOUNTS OF CAUSTIC SODA AND GASEOUS CHLORINE ARE REGULATED TO MAINTAIN A SLIGHT ALKALINITY TO PREVENT DECOMPOSITION OF SAID SODIUM HYPOCHLORITE, SAID REGULATION BEING PERFORMED BY MEASUREMENTS OF THE REDOX POTENTIAL OF SAID MIXTURE, THE IMPROVEMENT COMPRISING MEASURING SAID REDOX PO-/ TENTIAL IN AT LEAST ONE OF SAID CHLORINATOR AND SAID ILET AND DISCHARGE CONDUITS, CONVERTING SAID REDOX POTENTIAL INTO AN IMPULSE CORRESPONDING TO THE FIRST DERIVATIVE OF SAID REDOX POTENTIAL RELATIVE TO TIME AND REGULATING BY SAID IMPULSE THE ADDITION OF AT LEAST ONE OF SAID CAUSTIC SODA AND CHLORINE, SAID ADDITION BEING MADE IN THE DIRECTION OF MAINTAINING SUBSTANTIALLY CONSTANT SAID FIRST DERIVATIVE OF SAID REDOX POTENTIAL.
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |