Patent US3975271A successfully refreshed from Google Patents.
US3975271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sterilizing water by the combination of chlorine and another halogen
Assignee: Individual
•
Filing: 1974-09-23
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Granted: 1976-08-17
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Expires: 1994-09-23
Abstract
Abstract For water disinfection or sterilization, for instance of drinking, municipal waste, industrial or swimming-pool waters, there is introduced in a reactor a mixture of chlorine and of a salt of another halogen (bromine and/or iodine) in such conditions that mainly free halogen and hypohalogenous acid of said other halogen are produced; the mixture is supplied to the water, in such amounts that, an halogenated residual capable of destroying microbial contamination in the system, is maintained.
Inventors
- 👤 Bernard Saunier
- 👤 Antoine Derreumaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:01
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/766
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
Process for the sterilization or the disinfection of water containing ammonia nitrogen which comprises: reacting in a reactor wherein the pH is maintained between 2.5 and 5.5 and the temperature above 10°C; chlorine and a bromide, the molar ratio of the amount of chlorine and of the bromide being comprised between 1/0.05 and 1/2 where 1 is for the chlorine; and discharging the content of said reaction into said water, thereby disinfecting said water.
Claim 2
Dependent Claim
74 words
Process for the sterilization or the disinfection of water containing ammonia nitrogen which comprises: reacting in a reactor wherein the pH is maintained between 2.5 and 5.5 and the temperature above 10°C; chlorine and a bromide, the molar ratio of the amount of chlorine and of the bromide being comprised between 1/0.05 and 1/2 where 1 is for the chlorine; and discharging the content of said reaction into said water, thereby disinfecting said water.
Claim 3
Dependent Claim
19 words
Process according to claim 1 wherein the pH in the reactor is maintained equal to or smaller than 3.5.
Claim 4
Dependent Claim
20 words
Process according to claim 1 wherein the chlorine is fed to the reactor under the form of concentrated chlorinated water.
Claim 5
Dependent Claim
16 words
Process according to claim 1 wherein the chlorine is fed to the reactor in gaseous state.
Claim 6
Dependent Claim
29 words
Process according to claim 1, for use for treating a water having less than 1 mg/l ammonia nitrogen compound content, wherein the said molar ratio is greater than 2.
Claim 7
Dependent Claim
30 words
Process according to claim 1, for use for treating a water having a greater than 1 mg/l ammonia nitrogen compound content, wherein the said molar ratio is smaller than 2.
Claim 8
Dependent Claim
40 words
Process according to claim 1 further comprising the prior injection of chlorine into said water prior to the said discharge, the amount of chlorine in said prior injection being just sufficient to satisfying the halogen immediate demand of said water.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |