US3723306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ions or molecules from mixtures using graft-polymerized or polymer deposited ion exchange or permselective materials
Assignee: Continental Group Inc
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Filing: 1971-02-19
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Granted: 1973-03-27
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Expires: 1991-02-19
Abstract
Abstract Mixtures of materials including solutions, gaseous mixtures, and colloids are purified or separated by contact with or passing through ion exchange or permselective materials which have been modified by polymer deposition or graft polymerization. The materials used in the separatory process are generally webs, membranes, beads, granules, or other shaped objects which have ion exchange capacity or permselective surface characteristics, which materials have been modified by graft polymerization or polymer deposition to provide the desired permselective or ion exchange characteristics.
Inventors
- 👤 D Bridgeford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0093; B01D67/00931; B01D71/00; B01D71/06; B01D71/08; B01D71/10; B01D71/12; B01J; B01J47/00; B01J47/016; C; C08; C08F; C08F251/00; C08F251/02; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2212; D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/67341; D06P5/00; D06P5/22; B01D2323/00; B01D2323/38; C08J2301/00; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
25 words
A method as defined in claim 1 in which said host material is a particulate, molded, or formed material, or a fabric, web, or membrane.
Claim 2
Dependent Claim
19 words
A method as defined in claim 2 in which said web or membrane is paper or regenerated cellulose film.
Claim 3
Dependent Claim
21 words
A method as defined in claim 2 in which said host material has said polymer grafted only in preselected regions thereof.
Claim 4
Dependent Claim
87 words
A method as defined in claim 2 in which said host material is treated to chemically fix therein a material adapted to provide at least part of a catalyst for effecting polymerization of an olefinically unsaturated monomer, within the host material by ion exchange reaction, treating the host material and chemically fixed material in any order with said olefinically unsaturated monomer, and anything additional required to render said chemically fixed material catalytically active to polymerize said monomer and graft the resulting guest polymer within said host material.
Claim 5
Dependent Claim
40 words
A method as defined in claim 1 in which a solution of an electrolyte is contacted with an ion exchange material comprising a host polymeric material having a polymer graft polymerized therein having functional groups with substantial ion exchange capacity.
Claim 6
Dependent Claim
21 words
A method as defined in claim 6 in which the grafted polymer contains acidic or basic functional groups or mixtures thereof.
Claim 7
Dependent Claim
87 words
A method as defined in claim 6 in which said host material is treated to chemically fix therein a material adapted to provide at least part of a catalyst for effecting polymerization of an olefinically unsaturated monomer, within the host material by ion exchange reaction, treating the host material and chemically fixed material in any order with said olefinically unsaturated monomer, and anything additional required to render said chemically fixed material catalytically active to polymerize said monomer and graft the resulting guest polymer within said host material.
Claim 8
Dependent Claim
87 words
A method as defined in claim 1 in which said host material is treated to chemically fix therein a material adapted to provide at least part of a catalyst for effecting polymerization of an olefinically unsaturated monomer, within the host material by ion exchange reaction, treating the host material and chemically fixed material in any order with said olefinically unsaturated monomer, and anything additional required to render said chemically fixed material catalytically active to polymerize said monomer and graft the resulting guest polymer within said host material.
Claim 9
Dependent Claim
58 words
A method as defined in claim 1 in which a solution or fluid mixture containing ions or molecules of different size, shape, or polarity, is contacted with a material comprising a host material having a polymer of an olefinically unsaturated monomer graft polymerized therein to provide the desired separatory properties, whereby only selected molecules or ions pass therethrough.
Claim 10
Dependent Claim
87 words
A method as defined in claim 10 in which said host material is treated to chemically fix therein a material adapted to provide at least part of a catalyst for effecting polymerization of an olefinically unsaturated monomer, within the host material by ion exchange reaction, treating the host material and chemically fixed material in any order with said olefinically unsaturated monomer, and anything additional required to render said chemically fixed material catalytically active to polymerize said monomer and graft the resulting guest polymer within said host material.
Claim 11
Dependent Claim
25 words
A method as defined in claim 10 in which said host material is a particulate, molded, or formed material, or a fabric, web, or membrane.
Claim 12
Dependent Claim
87 words
A method as defined in claim 12 in which said host material is treated to chemically fix therein a material adapted to provide at least part of a catalyst for effecting polymerization of an olefinically unsaturated monomer, within the host material by ion exchange reaction, treating the host material and chemically fixed material in any order with said olefinically unsaturated monomer, and anything additional required to render said chemically fixed material catalytically active to polymerize said monomer and graft the resulting guest polymer within said host material.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |