US5279745A
Expired / Lapsed
US
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Polymer beads containing an immobilized extractant for sorbing metals from solution
Assignee: United States Department of the Interior
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Filing: 1991-12-26
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Granted: 1994-01-18
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Expires: 2011-12-26
Abstract
Abstract Polymer beads are prepared containing an immobilized extractant for sorbing metal contaminants at concentrations of less than 1 mg/L in dilute aqueous solutions. A preferred polymer is polysulfone and the extractant can be a biomass material or a synthetic chemical compound sorbed into activated carbon. The polymer beads are prepared by dissolving the polymer in an organic solvent to form a solution, adding the extractant to the solution to form a mixture and injecting the mixture through a nozzle into water to form the beads.
Inventors
- 👤 Thomas H. Jeffers
- 👤 Don C. Seidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:36
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28016; B01J20/28019; B01J13/00; B01J13/02; B01J13/025; B01J13/06; B01J20/02; B01J20/20; B01J20/22; B01J20/26; B01J20/262; B01J20/28002; B01J20/28009; B01J20/28011; B01J20/28026; B01J20/28054; B01J20/28095; B01J20/28097; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/3212; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3248; B01J20/3251; B01J20/3253; B01J20/34; B01J20/3425; B01J20/345; B01J20/3475; C; C02; C02F; C02F1/00; C02F1/26; C02F1/28; C02F1/285; C02F1/52; C02F1/5263; C02F1/5272; C12; C12N; C12N11/00; C12N11/02; C12N11/04; C12N11/10; C12N11/12; C22; C22B; C22B3/00; C22B3/18; C22B3/20; C22B3/22; C22B3/24; B01J2220/00; B01J2220/40; B01J2220/46; B01J2220/50; B01J2220/58; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S435/00; Y10S435/803
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
Water-insoluble spherical beads consisting essentially of polysulfone having an internal pore structure which contains an immobilized synthetic chemical compound extractant sorbed into powdered activated carbon, said synthetic chemical compound extractant and powdered activated carbon being immobilized within the polysulfone and said synthetic chemical compound extractant being capable of sorbing dissolved metals having concentrations less than 1 mg/L in dilute aqueous solutions.
Claim 2
Dependent Claim
61 words
Water-insoluble spherical beads consisting essentially of polysulfone having an internal pore structure which contains an immobilized synthetic chemical compound extractant sorbed into powdered activated carbon, said synthetic chemical compound extractant and powdered activated carbon being immobilized within the polysulfone and said synthetic chemical compound extractant being capable of sorbing dissolved metals having concentrations less than 1 mg/L in dilute aqueous solutions.
Claim 3
Dependent Claim
21 words
Water-insoluble spherical beads according to claim 1, wherein said synthetic chemical compound extractant comprises a mixture of synthetic chemical compound extractants.
Claim 4
Dependent Claim
22 words
Water-insoluble spherical beads according to claim 1, wherein said synthetic chemical compound extractant comprises 10% to 68% by weight of said bead.
Claim 5
Dependent Claim
34 words
Water-insoluble spherical beads according to claim 1, wherein said synthetic chemical compound extractant is selected from the group consisting of triisooctyl amine, di-2-ethylhexyl phosphoric acid, trioctyl methylammonium chloride, 2-hydroxyl-5-dodecylbenzophenone oxime and di-2-4,4-trimethylpentyl phosphinic acid.
Claim 6
Dependent Claim
105 words
A process for making water-insoluble spherical beads consisting essentially of polysulfone having an internal pore structure which contains an immobilized synthetic chemical compound extractant sorbed into powdered activated carbon, said synthetic chemical compound extractant being capable of sorbing dissolved metals having concentrations less than 1 mg/L in dilute aqueous solutions, said method comprising the steps of: a) dissolving said polysulfone in an organic solvent; b) sorbing a synthetic chemical compound extractant into powdered activated carbon; c) blending said synthetic chemical extractant sorbed into powdered activated carbon into the polysulfone organic solvent solution; and d) injecting said solution through a nozzle into water to form beads.
Claim 7
Dependent Claim
105 words
A process for making water-insoluble spherical beads consisting essentially of polysulfone having an internal pore structure which contains an immobilized synthetic chemical compound extractant sorbed into powdered activated carbon, said synthetic chemical compound extractant being capable of sorbing dissolved metals having concentrations less than 1 mg/L in dilute aqueous solutions, said method comprising the steps of: a) dissolving said polysulfone in an organic solvent; b) sorbing a synthetic chemical compound extractant into powdered activated carbon; c) blending said synthetic chemical extractant sorbed into powdered activated carbon into the polysulfone organic solvent solution; and d) injecting said solution through a nozzle into water to form beads.
Claim 8
Dependent Claim
19 words
The process of claim 5, wherein said synthetic chemical compound extractant comprises a mixture of synthetic chemical compound extractants.
Claim 9
Dependent Claim
20 words
The process of claim 5, wherein said synthetic chemical compound extractant comprises 10% to 68% by weight of said bead.
Claim 10
Dependent Claim
32 words
The process of claim 5, wherein said synthetic chemical compound extractant is selected from the group consisting of triisooctyl amine, di-2-ethylhexyl phosphoric acid, tri-octyl methylammonium chloride, 2-hydroxy-5-dodecylbenzophenone oxime and di-2-4,4-trimethylpentyl phosphinic acid.
Claim 11
Independent Claim
60 words
A method of removing metal contaminants having concentrations less than 1 mg/L in dilute aqueous solutions, said method comprising contacting the aqueous solutions with a matrix of water insoluble polymeric beads consisting essentially of polysulfone having an internal pore structure which contains an immobilized synthetic chemical compound extractant sorbed into powdered activated carbon; and sorbing said contaminants into said beads.
Claim 12
Independent Claim
60 words
A method of removing metal contaminants having concentrations less than 1 mg/L in dilute aqueous solutions, said method comprising contacting the aqueous solutions with a matrix of water insoluble polymeric beads consisting essentially of polysulfone having an internal pore structure which contains an immobilized synthetic chemical compound extractant sorbed into powdered activated carbon; and sorbing said contaminants into said beads.
Claim 13
Dependent Claim
19 words
The method of claim 9 wherein said synthetic chemical compound extractant comprises a mixture of synthetic chemical compound extractants.
Claim 14
Dependent Claim
20 words
The method of claim 9, wherein said synthetic chemical compound extractant comprises 10% to 68% by weight of said bead.
Claim 15
Dependent Claim
32 words
The method of claim 9, wherein said synthetic chemical compound extractant is selected from the group consisting of triisooctyl amine, di-2-ethylhexyl phosphoric acid, tri-octyl methylammonium chloride, 2-hydroxy-5-dodecylbenzophenone oxime and di-2-4,4-trimethylpentyl phosphinic acid.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-01-17 | 1997-07-19 | 1998-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-17 | 2001-07-19 | 2002-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-17 | 2005-07-19 | 2006-01-18 | $7700.00 | Window Closed / Lapsed |