US4002564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cation-exchange resins having cross-linked vinyl aromatic polymer matrix with attached amino alkylene phosphonic acid groups, their use, and preparation
Assignee: Rohm and Haas Co
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Filing: 1975-07-23
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Granted: 1977-01-11
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Expires: 1995-07-23
Abstract
Abstract Described is an ion exchange resin prepared from a cross-linked vinyl-aromatic polymer carrying recurring active units of the formula --CH 2 NHRPO(OH) 2 wherein R is a lower alkylene radical. Such resins are useful in selectively removing metal ions from solutions, and may be prepared, e.g., by reaction of a primary amino-substituted cross-linked copolymer with a phosphorus trihalide and a simple (C 1 -C 3 ) aldehyde.
Inventors
- 👤 Jack Carbonel
- 👤 Paul D. A. Grammont
- 👤 Jean E. E. Herbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:09
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/12; C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
A cation-exchange resin having a cross-linked vinyl aromatic polymer matrix and characterized, in the acid form, by active groups attached to the aromatic rings of the formula: -CH 2 NHRPO(OH) 2 , wherein R is C 1 -C 3 lower alkylene.
Claim 2
Dependent Claim
41 words
A cation-exchange resin having a cross-linked vinyl aromatic polymer matrix and characterized, in the acid form, by active groups attached to the aromatic rings of the formula: -CH 2 NHRPO(OH) 2 , wherein R is C 1 -C 3 lower alkylene.
Claim 3
Dependent Claim
10 words
A resin as in claim 1 wherein R is methylene.
Claim 4
Dependent Claim
16 words
A resin as in claim 1 wherein said matrix is a copolymer of styrene and divinylbenzene.
Claim 5
Dependent Claim
11 words
A resin as in claim 1 wherein said matrix is macroporous.
Claim 6
Dependent Claim
50 words
A process for removing metal ions from aqueous solution, which process comprises contacting said solution with a particulate cation-exchange resin which is a cross-linked vinyl aromatic polymer matrix, characterized by aromatic rings bearing groups of the formula: -CH 2 NHRPO(OH) 2 , wherein R is C 1 -C 3 alkylene.
Claim 7
Dependent Claim
50 words
A process for removing metal ions from aqueous solution, which process comprises contacting said solution with a particulate cation-exchange resin which is a cross-linked vinyl aromatic polymer matrix, characterized by aromatic rings bearing groups of the formula: -CH 2 NHRPO(OH) 2 , wherein R is C 1 -C 3 alkylene.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |