US3869376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for demineralizing water by electrodialysis
Assignee: PAULINA RIELOFF-TEJEDA (50%)
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Filing: 1973-05-14
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Granted: 1975-03-04
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Expires: 1993-05-14
Abstract
Abstract This disclosure relates to the electrodialytic demineralization of water by passing soft water through a treating chamber defined by a pair of permselective membranes of which the one closer to the cathode of the cell is cationic permselective and the one closer to the anode is anionic permselective. The chamber is charged with an ion exchange material. The effluent from the treating chamber may be passed through a second like treating chamber. The ion exchange materials with which the cell or cells are charged may be cationic, anionic, both cationic and anionic, or cationic in one chamber and anionic in another chamber where more than one treating chamber is employed. The particular types of ion exchange materials selected will depend upon the flow pattern and arrangement of chambers in different electrodialytic cells embodying the invention.
Inventors
- 👤 Alvaro R Tejeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:56
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/469; C02F1/4693; B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/48; B01J; B01J47/00; B01J47/02; B01J47/06; B01J47/08; C02F1/42; C02F1/4604; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
359 words
An electrodialytic apparatus for the treatment of soft water, said apparatus comprising at least nine serially disposed compartments including a first compartment having a ferrous cathode electrode disposed therein, a second compartment immediately adjacent said first compartment and separated therefrom by a cation permselective membrane, a bed of cation exchange material disposed within said second compartment, a third compartment immediately adjacent said second compartment and separated therefrom by an anion permselective membrane, a fourth compartment immediately adjacent said third compartment and separated therefrom by a cation permselective membrane, a bed of anion exchange material disposed within said fourth compartment, a fifth compartment immediately adjacent said fourth compartment and separated therefrom by an anion permselective membrane, a sixth compartment immediately adjacent said fifth compartment and separated therefrom by a cation permselective membrane, a bed of anion exchange material disposed within said sixth compartment, a seventh compartment immediately adjacent said sixth compartment and separated therefrom by an anion permselective membrane, an eighth compartment immediately adjacent said seventh compartment and separated therefrom by a cation permselective membrane, a bed of cation exchange material disposed within said eighth compartment, a ninth compartment immediately adjacent said eighth compartment and separated therefrom by an anion permselective membrane, said ninth compartment having a ferrous anode electrode disposed therein, means for introducing soft water into the second, third, fifth, sixth and seventh compartments, means for removing fluid from the second, third, fifth, sixth and seventh compartments, means for introducing fluid removed from the second compartment into the fourth compartment, means for introducing fluid removed from the sixth compartment into the eighth compartment, means for removing fluid from the third, fifth and seventh compartments and leading the same to a treatment means, means for removing fluid from the fourth and eighth compartments, combining the same and leading the combined fluids to an outlet for use, and means for impressing a direct electric current across said cathode and anode electrodes whereby the fluid leaving the fourth compartment is deionized Water at an alkaline pH, the fluid leaving the eighth compartment is deionized water at an acidic pH, and the combined fluids comprise deionized water at a substantially neutral pH.
Claim 2
Dependent Claim
359 words
An electrodialytic apparatus for the treatment of soft water, said apparatus comprising at least nine serially disposed compartments including a first compartment having a ferrous cathode electrode disposed therein, a second compartment immediately adjacent said first compartment and separated therefrom by a cation permselective membrane, a bed of cation exchange material disposed within said second compartment, a third compartment immediately adjacent said second compartment and separated therefrom by an anion permselective membrane, a fourth compartment immediately adjacent said third compartment and separated therefrom by a cation permselective membrane, a bed of anion exchange material disposed within said fourth compartment, a fifth compartment immediately adjacent said fourth compartment and separated therefrom by an anion permselective membrane, a sixth compartment immediately adjacent said fifth compartment and separated therefrom by a cation permselective membrane, a bed of anion exchange material disposed within said sixth compartment, a seventh compartment immediately adjacent said sixth compartment and separated therefrom by an anion permselective membrane, an eighth compartment immediately adjacent said seventh compartment and separated therefrom by a cation permselective membrane, a bed of cation exchange material disposed within said eighth compartment, a ninth compartment immediately adjacent said eighth compartment and separated therefrom by an anion permselective membrane, said ninth compartment having a ferrous anode electrode disposed therein, means for introducing soft water into the second, third, fifth, sixth and seventh compartments, means for removing fluid from the second, third, fifth, sixth and seventh compartments, means for introducing fluid removed from the second compartment into the fourth compartment, means for introducing fluid removed from the sixth compartment into the eighth compartment, means for removing fluid from the third, fifth and seventh compartments and leading the same to a treatment means, means for removing fluid from the fourth and eighth compartments, combining the same and leading the combined fluids to an outlet for use, and means for impressing a direct electric current across said cathode and anode electrodes whereby the fluid leaving the fourth compartment is deionized Water at an alkaline pH, the fluid leaving the eighth compartment is deionized water at an acidic pH, and the combined fluids comprise deionized water at a substantially neutral pH.
Claim 3
Dependent Claim
25 words
An apparatus as set forth in claim 1 wherein the first and ninth compartments contain means for continuously passing an electrolytically conductive aqueous solution therethrough.
Claim 4
Dependent Claim
24 words
An apparatus as set forth in claim 2 wherein the continuous passing means in the ninth compartment continuously passes an aqueous caustic solution therethrough.
Claim 5
Dependent Claim
24 words
An apparatus as set forth in claim 1 wherein the first and ninth compartments contain means for continuously passing an aqueous caustic solution therethrough.
References Cited (Backward Citations)
US3084113A
Cited
US3645884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |