US4277565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Macromolecular adsorbent containing pendant difluoroalkyl phosphate groups for adsorbing heavy metal ions
Assignee: AGC Inc
•
Filing: 1979-03-29
•
Granted: 1981-07-07
•
Expires: 1999-03-29
Abstract
Abstract A macromolecular adsorbent is suitable for recovering heavy metal ions such as uranium ions from a dilute solution such as sea water and is a polymer having pendant groups having the formula <IMAGE> wherein R1 represent a C1-C8 divalent organic group; R2 and R3 respectively represents a C1-C5 divalent organic group; p, q, r and l respectively represent 0 or 1; Rf represents a C1-C10 divalent perfluoro group; X1 and X2 respectively represent hydroxyl group or a hydroxyl convertible group or atom.
Inventors
- 👤 Yoshio Oda
- 👤 Masaaki Yamabe
- 👤 Masao Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:32
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; B01J20/26; C; C08; C08F; C08F8/00; C08F8/40
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
84 words
A macromolecular adsorbent capable of adsorbing heavy metal ions, which comprises: a polymer having pendant groups of the formula: ##STR17## wherein R' is a C 1 -C 8 divalent organic group; R 2 and R 3 are each a C 1 -C 5 divalent organic group: p, q, r and l each are 0 or 1; R f is a C 1 -C 10 divalent perfluoro group; and X 1 and X 2 each are hydroxyl or a substituent convertible to a hydroxy group.
Claim 2
Dependent Claim
84 words
A macromolecular adsorbent capable of adsorbing heavy metal ions, which comprises: a polymer having pendant groups of the formula: ##STR17## wherein R' is a C 1 -C 8 divalent organic group; R 2 and R 3 are each a C 1 -C 5 divalent organic group: p, q, r and l each are 0 or 1; R f is a C 1 -C 10 divalent perfluoro group; and X 1 and X 2 each are hydroxyl or a substituent convertible to a hydroxy group.
Claim 3
Dependent Claim
20 words
The adsorbent of claim 1, wherein the content of phosphono groups in said polymer is greater than 0.2 meq/g polymer.
Claim 4
Dependent Claim
44 words
The adsorbent of claim 1, wherein said polymer is formed by reacting a divalent perfluro radical containing group with a skeleton polymer thereby bonding said divalent perfluoro radical containing group to said skeleton polymer and then phosphonolating said attached divalent perfluoro radical containing group.
Claim 5
Dependent Claim
36 words
The adsorbent of claim 1, wherein said polymer is formed by polymerizing a monomer containing a divalent perfluoro organic radical having a functional site, and then phosphonolating said functional site on said divalent perfluoro organic radical.
Claim 6
Dependent Claim
18 words
The adsorbent of claim 1, wherein said polymer is derived from a skeleton polymer having a porous structure.
Claim 7
Dependent Claim
15 words
The adsorbent of claim 1, wherein said polymer is derived from a skeleton polystyrene polymer.
Claim 8
Dependent Claim
15 words
The adsorbent of claim 6, wherein said skeleton polystyrene polymer is a cross-linked polystyrene bead.
Claim 9
Dependent Claim
16 words
The adsorbent of claim 1, wherein said polymer has a molecular weight of greater than 20,000.
Claim 10
Dependent Claim
39 words
The adsorbent of claim 1, wherein said polymer is formed by halogenating polystyrene, reacting said halogenated polystyrene with a divalent organic halide compound containing a divalent perfluoro group, and then phosphonolating said divalent organic group attached to said polystyrene.
Claim 11
Dependent Claim
57 words
The adsorbent of claim 1, wherein said polymer is formed by halomethylating polystyrene, reacting said halomethylated polystyrene with an organic diol compound containing a divalent perfluoro group, thereby bonding said diol compound to said polystyrene by one of the alcohol functional groups, and then phosphonolating the remaining alcoholic functional group of said attached perfluoro group containing radical.
Claim 12
Dependent Claim
27 words
The adsorbent of claim 1, wherein said polymer is formed by polymerizing an unsaturated monomer containing a pendant --CX═CYZ group, and then phosphonolating said pendant unsaturated group.
Claim 13
Dependent Claim
24 words
The adsorbent of claim 1, wherein said substituent convertible to a hydroxy group is a halogen atom, an alkylamino group or a morpholino group.
Claim 14
Dependent Claim
31 words
The adsorbent of claim 1, wherein said R' group is phenylene, alkylene, oxyalkylene, carboxyl or an alkylenamide group, and wherein said R 2 and R 3 groups are alkylene or oxyalkylene.
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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |