Patent US4331541A successfully refreshed from Google Patents.
US4331541A
Expired / Lapsed
US
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Fiber-supported ion exchanger
Assignee: Rohm and Haas Co
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Filing: 1980-03-03
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Granted: 1982-05-25
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Expires: 2000-03-03
Abstract
Abstract Ion exchange materials are prepared by retaining a vinyl monomer solution within the interstices of a fiber structure, such as a woven or non-woven fabric, polymerizing these monomers in the presence of an organic solvent sparingly soluble or totally insoluble in water to form a macroreticular polymer, and functionalizing the macroreticular polymer with an ion exchange functional group.
Inventors
- 👤 Hiroshi Akiyama
- 👤 Hideo Naotsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:41
CPC Classifications
D; D06; D06M; D06M14/00; B; B01; B01J; B01J47/00; B01J47/12; B01J47/127; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
47 words
Ion exchanger comprising a macroporous structure of fibers having interstices between the individual fibers thereof, and disposed within said interstices and adhered to said fibers, a macroreticular, crosslinked polymer derived from polyvinyl monomers or a mixture of monovinyl and polyvinyl monomers and bearing ion exchange functional groups.
Claim 2
Dependent Claim
47 words
Ion exchanger comprising a macroporous structure of fibers having interstices between the individual fibers thereof, and disposed within said interstices and adhered to said fibers, a macroreticular, crosslinked polymer derived from polyvinyl monomers or a mixture of monovinyl and polyvinyl monomers and bearing ion exchange functional groups.
Claim 3
Dependent Claim
16 words
The ion exchanger of claim 1 wherein the macroporous structure of fibers is a non-woven fabric.
Claim 4
Dependent Claim
16 words
The ion exchanger of claim 1 wherein the macroporous structure of fibers is a woven fabric.
Claim 5
Dependent Claim
17 words
The ion exchanger of claim 1 wherein the ion exchange functional group is a cation exchange group.
Claim 6
Dependent Claim
17 words
The ion exchanger of claim 1 wherein the ion exchange functional group is an anion exchange group.
Claim 7
Dependent Claim
12 words
The ion exchanger of claim 1 wherein the fibers are synthetic fibers.
Claim 8
Dependent Claim
13 words
The ion exchanger of claim 6 wherein the synthetic fibers are polyolefin fibers.
Claim 9
Dependent Claim
13 words
The ion exchanger of claim 7 wherein the polyolefin fibers are polyethylene fibers.
Claim 10
Dependent Claim
13 words
The ion exchangers of claim 7 wherein the polyolefin fibers are polypropylene fibers.
Claim 11
Independent Claim
89 words
A method for the manufacture of an ion exchanger which comprises: (a) causing a solution containing polyvinyl monomers or a mixture of monovinyl and polyvinyl monomers to be retained in the interstices between the fibers of the macroporous structure of fibers in the presence of a polymerizing initiator and an organic solvent sparingly soluble or totally insoluble in water; (b) polymerizing in an aqueous medium the monomer retained in the interstices between the fibers of the fiber structure; and (c) introducing an ion exchange group into the resultant polymer.
Claim 12
Independent Claim
89 words
A method for the manufacture of an ion exchanger which comprises: (a) causing a solution containing polyvinyl monomers or a mixture of monovinyl and polyvinyl monomers to be retained in the interstices between the fibers of the macroporous structure of fibers in the presence of a polymerizing initiator and an organic solvent sparingly soluble or totally insoluble in water; (b) polymerizing in an aqueous medium the monomer retained in the interstices between the fibers of the fiber structure; and (c) introducing an ion exchange group into the resultant polymer.
Claim 13
Dependent Claim
20 words
The method of claim 10 wherein the oganic solvent sparingly soluble or totally insoluble in water is methyl isobutyl carbinol.
Claim 14
Dependent Claim
18 words
The method of claim 10 wherein the organic solvent sparingly soluble or totally insoluble in water is toluene.
Claim 15
Dependent Claim
11 words
The method of claim 10 wherein the fibers are synthetic fibers.
Claim 16
Dependent Claim
12 words
The method of claim 13 wherein the synthetic fibers are polyolefin fibers.
Claim 17
Dependent Claim
12 words
The method of claim 14 wherein the polyolefin fibers are polyethylene fibers.
Claim 18
Dependent Claim
12 words
The method of claim 14 wherein the polyolefin fibers are polypropylene fibers.
Claim 19
Independent Claim
66 words
A method for removal of ions from a solution which comprises contacting the solution containing the ions with an ion exchanger comprising a macroporous structure of fibers having interstices between the individual fibers thereof, and disposed within said interstices and adhered to said fibers, a macroreticular, crosslinked polymer derived from polyvinyl monomers or a mixture of monovinyl and polyvinyl monomers and bearing ion exchange functional groups.
Claim 20
Independent Claim
66 words
A method for removal of ions from a solution which comprises contacting the solution containing the ions with an ion exchanger comprising a macroporous structure of fibers having interstices between the individual fibers thereof, and disposed within said interstices and adhered to said fibers, a macroreticular, crosslinked polymer derived from polyvinyl monomers or a mixture of monovinyl and polyvinyl monomers and bearing ion exchange functional groups.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |