US3920530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation process
Assignee: Individual
•
Filing: 1974-07-10
•
Granted: 1975-11-18
•
Expires: 1994-07-10
Abstract
Abstract In a process for purifying an aqueous liquid by flotation of suspended solids with gas bubbles produced by electrolysis between at least one pair of electrodes, at least one of said electrodes, preferably in the form of an endless belt or band, is transported in or through said liquid while said electrolysis and flotation are taking place. Bridging and fouling of the electrodes are thereby minimised.
Inventors
- 👤 Kurt Xylander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:49
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1437; B03D1/1412; B03D1/1487; B03D1/1493; C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/46109; C02F1/465; C02F1/463; C02F1/52; C02F2001/46119; C02F2001/46123; C02F2001/46133; C02F2001/46152
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
49 words
A PROCESS FOR PURIFYING AN AQUEOUS LIQUID WHICH INCLUDES THE STEP OF PRODUCING BUBBLES BY ELECTROLYSIS BETWEEN AT LEAST ONE PAIR OF ELECTRODES FOR FLOTATION OF SUSPENDED SOLIDS BY SAID BUBBLES PRODUCED BY SAID ELECTROLYSIS WHEREIN THE IMPROVEMENT COMPRISES THE STEP OF MOVING AT LEAST ONE OF SAID ELEC-
Claim 2
Dependent Claim
49 words
A PROCESS FOR PURIFYING AN AQUEOUS LIQUID WHICH INCLUDES THE STEP OF PRODUCING BUBBLES BY ELECTROLYSIS BETWEEN AT LEAST ONE PAIR OF ELECTRODES FOR FLOTATION OF SUSPENDED SOLIDS BY SAID BUBBLES PRODUCED BY SAID ELECTROLYSIS WHEREIN THE IMPROVEMENT COMPRISES THE STEP OF MOVING AT LEAST ONE OF SAID ELEC-
Claim 3
Dependent Claim
25 words
The process according to claim 1 whereIn said step of moving comprises moving both electrodes of said pair at the same speed through said liquid.
Claim 4
Dependent Claim
50 words
The process according to claim 1 wherein said step of moving comprises lowering said at least one electrode from above the surface of said liquid to below said surface, transporting said at least one electrode generally horizontally through said liquid, and raising said at least one electrode above said surface.
Claim 5
Dependent Claim
71 words
The process according to claim 1 wherein said step of moving comprises moving successive pairs of said electrodes into said liquid, energizing said pairs of electrodes after they are submerged in said liquid and while they are transported a predetermined distance within said liquid, deenergizing said pairs of electrodes after they have been transported said predetermined distance, and removing said pairs of electrodes from said liquid after they have been de-energized.
Claim 6
Dependent Claim
29 words
The process of claim 1 wherein said step of moving comprises moving successive electrodes which are interconnected to form an endless belt into, through and out of said liquid.
Claim 7
Dependent Claim
23 words
The process according to claim 1 wherein said step of moving comprises moving successive electrodes continuously into, through and out of said liquid.
Claim 8
Dependent Claim
49 words
The process according to claim 1 wherein said step of moving comprises moving a first group of electrodes into said liquid, stopping the movement of said electrodes, and then moving said first group of electrodes out of said liquid while moving a second group of electrodes into said liquid.
Claim 9
Dependent Claim
27 words
The process according to claim 1 which includes moving a sediment-collecting tray through said liquid below the path in said liquid of said at least one electrode.
Claim 10
Dependent Claim
31 words
The process according to claim 1 which includes moving a sedimentcollecting tray through said liquid at the same speed at which said at least one electrode is moved through said liquid.
Claim 11
Dependent Claim
48 words
The process of claim 1 wherein said step of moving comprises lowering at least one pair of electrodes from above the surface of said liquid to below said surface, transporting said pair of electrodes generally horizontally through said liquid, and raising said pair of electrodes above said surface.
Claim 12
Dependent Claim
42 words
The process according to claim 1 which includes the step of moving said at least one of said electrodes into and out of contact with power supply means submerged in said liquid to selectively energize and deenergize said at least one electrode.
Claim 13
Dependent Claim
32 words
The process according to claim 1 wherein said step of moving comprises moving said at least one electrode substantially horizontally through said liquid adjacent the bottom of the container of said liquid.
Claim 14
Dependent Claim
31 words
The process according to claim 1 wherein said step of moving comprises moving said at least one electrode through said liquid at a speed between 10 and 200 centimers per hour.
Claim 15
Dependent Claim
44 words
The process of claim 3 wherein said steps of lowering and raising said at least one electrode comprise moving said at least one electrode through a passageway isolated from portions of said liquid above where said at least one electrode is transported generally horizontally.
Claim 16
Dependent Claim
29 words
The process according to claim 3 wherein said step of lowering comprises moving said at least one electrode down into said liquid along a path inclined from the vertical.
Claim 17
Dependent Claim
29 words
The process according to claim 3 wherein said step of raising comprises moving said at least one electrode upwardly through said liquid along a path inclined from the vertical.
Claim 18
Dependent Claim
20 words
The process according to claim 5 which comprises moving said successive electrodes to a cleaning station situated outside said liquid.
Claim 19
Dependent Claim
18 words
The process according to claim 5 which includes roller-guiding said endless belt of successive electrodes within said liquid.
Claim 20
Dependent Claim
34 words
The process according to claim 5 which includes temporarily disconnecting, removing, cleaning and re-connecting sections of said endless belt of electrodes after they have emerged from said liquid and before they re-enter the liquid.
Claim 21
Dependent Claim
30 words
The process aCcording to claim 5 which includes scrubbing electrode portions of said endless belt of electrodes after they have emerged from said liquid and before they re-enter said liquid.
Claim 22
Dependent Claim
25 words
The process according to claim 10 wherein said step of transporting comprises transporting pairs of electrodes of opposite polarity generally horizontally in the same plane.
Claim 23
Dependent Claim
29 words
The process according to claim 10 wherein said step of transporting comprises transporting pairs of electrodes of opposite polarity generally horizontally in first and second respective generally-horizontal, vertically-separated planes.
Claim 24
Dependent Claim
49 words
The process according to claim 10 which includes moving one electrode of said pair in a first generally horizontal direction through said liquid and moving the other electrode of said pair in a second generally horizontal direction through said liquid, said first direction being opposite to said second direction.
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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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |