US4693828A
Expired / Lapsed
US
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Method of ion-exchanging and/or adsorption
Assignee: Toray Industries Inc
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Filing: 1986-05-07
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Granted: 1987-09-15
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Expires: 2006-05-07
Abstract
Abstract This invention relates to a method of ion-exchange and/or adsorption, and to a method of producing pure water. More specifically, this invention relates to a method of ion-exchanging and/or adsorbing an unnecessary product or a useful product in a liquid to be treated. Concretely, this invention relates to a method of ion-exchange and/or adsorption and to a method of producing superpure water by first treating the liquid with an ion-exchange resin, and then treating the liquid with an ion-exchange fiber.
Inventors
- 👤 Toshio Yoshioka
- 👤 Seiichi Yoshikawa
- 👤 Masaharu Shimamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:44
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; B; B01; B01J; B01J47/00; B01J47/12; B01J47/127; C02F1/28; C02F1/285; Y; Y10; Y10S; Y10S210/00; Y10S210/90
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
81 words
A method of producing superpure water with an ion-exchanger, characterized in that the water is treated with a resin component containing an ion exchange resin selected from the group consisting of cation- and anion-exchange resins and mixtures thereof having an average particle diameter of 100 to 1000μ, and thereafter the water is treated with an ion-exchange fiber component containing an ion-exchange fiber selected from the group consisting of a cation-exchange fiber, an anion-exchange fiber and a chelate fiber and mixtures thereof.
Claim 2
Independent Claim
81 words
A method of producing superpure water with an ion-exchanger, characterized in that the water is treated with a resin component containing an ion exchange resin selected from the group consisting of cation- and anion-exchange resins and mixtures thereof having an average particle diameter of 100 to 1000μ, and thereafter the water is treated with an ion-exchange fiber component containing an ion-exchange fiber selected from the group consisting of a cation-exchange fiber, an anion-exchange fiber and a chelate fiber and mixtures thereof.
Claim 3
Dependent Claim
33 words
A method of producing superpure water as defined in claim 1, wherein said ion-exchange fiber is a composite fiber comprising a reinforcing polymer core and an ion-exchange polymer sheath which surrounds the core.
Claim 4
Dependent Claim
19 words
A method of producing superpure water as defined in claim 2, wherein said ion-exchange polymer is a poly(monovinylaromatic) compound.
Claim 5
Dependent Claim
18 words
A method of producing superpure water as defined in claim 2, wherein said reinforcing polymer is a poly-α-olefin.
Claim 6
Dependent Claim
29 words
A method of producing superpure water as defined in claim 1, wherein the water content degree of said ion-exchange fiber is within the range of from 0.5 to 10.
Claim 7
Dependent Claim
29 words
A method of producing superpure water as defined in claim 1, wherein the water content degree of said ion-exchange fiber is within the range of from 1 to 5.
Claim 8
Dependent Claim
35 words
A method of producing superpure water as defined in claim 1, wherein said ion-exchange fiber component comprises short fibers having a diameter of 1 to 100 μm and a length of 0.2 to 2 mm.
Claim 9
Dependent Claim
19 words
A method of producing superpure water as defined in claim 1, wherein said method is conducted using fixed beds.
Claim 10
Dependent Claim
35 words
A method of producing superpure water as defined in claim 1, wherein the ion-exchange capacity of said ion-exchange fiber relative to that of said ion-exchange resin is within the range of from 0.05 to 30%.
Claim 11
Dependent Claim
35 words
A method of producing superpure water as defined in claim 1, wherein the ion-exchange capacity of said ion-exchange fiber relative to that of said ion-exchange resin is within the range of from 0.1 to 20%.
Claim 12
Dependent Claim
28 words
A method of producing superpure water as defined in claim 1, wherein said cation-exchange resin contains a sulfonic group and said anion-exchange resin contains a quaternary ammonium group.
Claim 13
Dependent Claim
19 words
A method of producing superpure water as defined in claim 1, wherein said cation- and anion-exchange resins are mixed.
Claim 14
Dependent Claim
37 words
A method of producing superpure water as defined in claim 1, wherein said ion-exchange fiber component is a mixture and contains a cation-exchange fiber having a sulfonic group and an anion-exchange fiber having a quaternary ammonium group.
Claim 15
Dependent Claim
39 words
A method of producing superpure water as defined in claim 1, wherein said ion exchange fiber component is a mixture and contains a cation-exchange fiber having a sulfonic group and a powdered anion-exchange resin having a quaternary ammonium group.
Claim 16
Dependent Claim
39 words
A method of producing superpure water as defined in claim 1, wherein said ion exchange fiber component is a mixture and contains a powdered cation-exchange resin having a sulfonic group and an anion-exchange fiber having a quaternary ammonium group.
Claim 17
Dependent Claim
35 words
A method of producing superpure water as defined in claim 1, wherein said ion-exchange fiber component comprises a cation-exchange fiber which contains a sulfonic group and an anion-exchange fiber which contains a quarternary ammonium group.
Claim 18
Dependent Claim
23 words
A method of producing superpure water as defined in claim 1, wherein said ion-exchange fiber comprises a cation-exchange fiber present as a mixture.
Claim 19
Dependent Claim
37 words
A method of producing superpure water as defined in claim 1, wherein said chelate fiber comprises chelate groups selected from the group consisting of aminocarboxylic group, amidoxime group, aminophosphoryl group, polyamine group, pyridyl group and dithiocarbamyl group.
References Cited (Backward Citations)
US4313832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |