US4423158A
Expired / Lapsed
US
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Ion adsorbent for metals having a coordination number greater than two
Assignee: GELINNAVATION HANDELSAKTIEBOLAG A SWEDISH JOINT STOCK Co
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Filing: 1983-01-27
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Granted: 1983-12-27
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Expires: 2003-01-27
Abstract
Abstract Metal ion adsorbent that is formed by an organic polymer having a hydrophilic character through a content of an average of at least 0.5 substituents per monomer unit of any of the following types: OH, O, CO, NH 2 , NH or N, so that the concentration of these groups is at least 25 mol-percent. The polymer in a non-aqueous state contains at least 10 μmol of metal binding groups per gram of adsorbent. The metal binding group has 5 coordinating ligand atoms, two of which are nitrogen atoms and three of which are carboxylic acid groups.
Inventors
- 👤 Jerker O. Porath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
C; C01; C01G; C01G53/00; C01G53/01; B; B01; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3202; B01J20/3206; B01J20/3208; B01J20/321; B01J20/3212; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3248; B01J20/3251; B01J45/00; C01G11/00; C01G11/003; C01G3/00; C01G3/003; C01G49/00; C01G49/0009; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
Metal ion adsorbent, characterized in that it is composed of an organic polymer having a hydrophilic character through a content of an average at least 0.5 substituents per monomer unit of any of the following types: OH, O, CO, NH 2 , NH or N, so that the concentration of these groups reaches at least 25 mol-percent, the polymer in a non-aqueous state containing at least 10 umol of metal binding groups per gram of adsorbent, and the metal binding group being characterized by five coordinating ligand atoms, two being nitrogen atoms and being carboxylic acid groups, the metal binding group being bound to the polymer as follows: ##STR12## wherein X is H or an alkyl group.
Claim 2
Dependent Claim
117 words
Metal ion adsorbent, characterized in that it is composed of an organic polymer having a hydrophilic character through a content of an average at least 0.5 substituents per monomer unit of any of the following types: OH, O, CO, NH 2 , NH or N, so that the concentration of these groups reaches at least 25 mol-percent, the polymer in a non-aqueous state containing at least 10 umol of metal binding groups per gram of adsorbent, and the metal binding group being characterized by five coordinating ligand atoms, two being nitrogen atoms and being carboxylic acid groups, the metal binding group being bound to the polymer as follows: ##STR12## wherein X is H or an alkyl group.
Claim 3
Dependent Claim
18 words
Metal ion adsorbent according to claim 1 wherein the polymer is a crosslinked linear or branched organic polymer.
Claim 4
Dependent Claim
15 words
Metal ion adsorbent according to claim 2 wherein the polymer is composed of a polysaccharide.
Claim 5
Dependent Claim
17 words
Metal ion adsorbent according to claim 3 wherein the polysaccaride is agar, agarose, dextrane, starch or cellulose.
Claim 6
Dependent Claim
14 words
Metal ion adsorbent according to claim 2 wherein the polymer is a polyvinyl compound.
Claim 7
Dependent Claim
16 words
Metal ion adsorbent according to claim 1 wherein the adsorbent is in the form of particles.
Claim 8
Dependent Claim
17 words
Metal ion adsorbent according to claim 1 wherein the adsorbent is in the form of a thread.
Claim 9
Dependent Claim
17 words
Metal ion adsorbent according to claim 1 wherein the adsorbent is in the form of a membrane.
Claim 10
Dependent Claim
19 words
Metal ion adsorbent according to claim 1 wherein the adsorbent is in the form of a porous polymer sponge.
Claim 11
Dependent Claim
11 words
Metal ion adsorbent according to claim 1 wherein X is methyl.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |