US4836929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for breaking down organic substances and/or microbes in pretreated feed water for high-purity water recirculation systems
Assignee: CUSTOM METALCRAFT Inc 2332 EAST DIVISION
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Filing: 1988-03-09
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Granted: 1989-06-06
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Expires: 2008-03-09
Abstract
Abstract A process for breaking down organic substances and/or microbes in pretreated feed water for high-purity recirculation systems using ozone which is generated in the anode space (5) of an electrochemical cell (3) and treated with ultraviolet rays and/or with H 2 (8) generated in the cathode space (6) of the same cell (3) or H 2 (20) supplied from outside. The latter is used to reduce elementary oxygen in any form to harmless water. Post treatment via mixed bed (14) and filter (15). Possibility of feeding back water (19) downstream of the receiver (17). No harmful reaction products.
Inventors
- 👤 Hans Baumann
- 👤 Samuel Stucki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:16
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4672; C02F1/20; C02F1/30; C02F1/32; C02F1/44; C02F1/441; C02F1/444; C02F1/42; C02F2001/427; C02F2101/00; C02F2101/30; C02F2103/00; C02F2103/02; C02F2103/04; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115; C02F2201/4612; C02F2201/4618; C02F2201/78; C02F2201/782; C02F2303/00; C02F2303/04; C02F2303/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
A process for purifying water, comprising the steps of: (i) electrolizing water in an electrochemical cell provided with a solid electrolyte, an anode space and a cathode space, to form ozone in said anode space and hydrogen in said cathode space; (ii) contacting said water with said ozone for a sufficient time to break down any organic substances and microbes in said water to obtain an ozone treated water; (iii) exposing said ozone treated water to ultraviolet radiation to obtain ultraviolet radiation treated water; and (iv) contacting said ultraviolet radiation treated water with a portion of said hydrogen generated in said cathode space to obtain hydrogen treated water.
Claim 2
Dependent Claim
108 words
A process for purifying water, comprising the steps of: (i) electrolizing water in an electrochemical cell provided with a solid electrolyte, an anode space and a cathode space, to form ozone in said anode space and hydrogen in said cathode space; (ii) contacting said water with said ozone for a sufficient time to break down any organic substances and microbes in said water to obtain an ozone treated water; (iii) exposing said ozone treated water to ultraviolet radiation to obtain ultraviolet radiation treated water; and (iv) contacting said ultraviolet radiation treated water with a portion of said hydrogen generated in said cathode space to obtain hydrogen treated water.
Claim 3
Dependent Claim
29 words
The process of claim 1, wherein in step (iv) said ultraviolet radiation treated water is contacted with an amount of hydrogen which is not generated in said cathode space.
Claim 4
Dependent Claim
38 words
The process of claim 1, wherein the portion of said ozone and a portion of any oxygen present in said ultraviolet radiation treated water is drawn off in the gaseous state after step (iii) and before step (iv).
Claim 5
Dependent Claim
22 words
The process of claim 1, further comprising the step of: (v) passing said hydrogen treated water through a mixed bed ion exchanger.
Claim 6
Dependent Claim
23 words
The process of claim 1, further comprising the step of: (v') filtering said hydrogen treated water through an ultrafiltration or reverse osmosis apparatus.
Claim 7
Dependent Claim
21 words
The process of claim 1, wherein a portion of said hydrogen treated water is used as said water in step (i).
Claim 8
Dependent Claim
15 words
The process of claim 1, wherein said steps (ii) and (iii) are carried out simultaneously.
Claim 9
Dependent Claim
86 words
A process for purifying water, comprising the steps of: (i) electrolizing water in an electrochemical cell provided with a solid elecrolyte, an anode space and a cathode space, to form ozone in said anode space and hydrogen in said cathode space; (ii) contacting said water with said ozone for sufficient time to break down any organic substances and microbes in said water to obtain an ozone treated water; and (iii) contacting said ozone treated water with a portion of said hydrogen generated in said cathode space.
Claim 10
Dependent Claim
86 words
A process for purifying water, comprising the steps of: (i) electrolizing water in an electrochemical cell provided with a solid elecrolyte, an anode space and a cathode space, to form ozone in said anode space and hydrogen in said cathode space; (ii) contacting said water with said ozone for sufficient time to break down any organic substances and microbes in said water to obtain an ozone treated water; and (iii) contacting said ozone treated water with a portion of said hydrogen generated in said cathode space.
Claim 11
Dependent Claim
28 words
The process of claim 8, wherein in step (iii) said ozone treated water is contacted with an amount of hydrogen which is not generated in said cathode space.
Claim 12
Dependent Claim
33 words
The process of claim 8, wherein a portion of said ozone and a portion of any oxygen present in said ozone treated water is drawn off in the gaseous state after step (iii).
Claim 13
Dependent Claim
22 words
The process of claim 8, further comprising the step of: (iv) passing said hydrogen treated water through a mixed bed ion exchanger.
Claim 14
Dependent Claim
23 words
The process of claim 8, further comprising the step of: (iv') filtering said hydrogen treated water through an ultrafiltration or reverse osmosis apparatus.
Claim 15
Dependent Claim
21 words
The process of claim 8, wherein a portion of said hydrogen treated water is used as said water in step (i).
Claim 16
Dependent Claim
20 words
The process of claim 8, wherein in said step (ii) said water is mixed with an amount of unelectrolyzed water.
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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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |