Patent US4530723A successfully refreshed from Google Patents.
US4530723A
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US
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Encapsulation of ion exchange resins
Assignee: Westinghouse Electric Corp
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Filing: 1983-11-04
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Granted: 1985-07-23
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Expires: 2003-11-04
Abstract
Abstract Disclosed is a method for rapidly forming a solid monolith of an aqueous mixture of an ion exchange resin and boric acid. A fouling agent and sufficient basic accelerator to neutralize the mixture are added. Cement is then added which hardens in a few hours. Also disclosed is a composition of the ion exchange resin, boric acid, water, a fouling agent, a basic accelerator, and cement.
Inventors
- 👤 Eugene E. Smeltzer
- 👤 Michael C. Skriba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:33
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/12; C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; G21F9/28; G21F9/30; G21F9/301; G21F9/302; G21F9/304; C04B2111/00; C04B2111/00474; C04B2111/00767; C04B2111/00784; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
72 words
A process for encapsulating in cement an ion exchange resin aqueous mixture containing about 1 to about 30% dissolved solids, comprising adding to said mixture: (A) about 1 to about 3% of a fouling agent; (B) a sufficient amount of a basic accelerator to raise the pH to at least 7; and (C) sufficient cement for a water to cement weight ratio of about 0.4 to 1 to about 0.6 to 1.
Claim 2
Dependent Claim
72 words
A process for encapsulating in cement an ion exchange resin aqueous mixture containing about 1 to about 30% dissolved solids, comprising adding to said mixture: (A) about 1 to about 3% of a fouling agent; (B) a sufficient amount of a basic accelerator to raise the pH to at least 7; and (C) sufficient cement for a water to cement weight ratio of about 0.4 to 1 to about 0.6 to 1.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein said ion exchange resin has a particle size of up to about 3 mm.
Claim 4
Dependent Claim
12 words
A process according to claim 1 wherein said mixture includes radioactive contaminants.
Claim 5
Dependent Claim
15 words
A process according to claim 1 which occurs at a temperature of about 160° F.
Claim 6
Dependent Claim
32 words
A process according to claim 1 wherein said fouling agent is selected from the group consisting of motor oil, hydraulic oil, water-soluble cutting oil, oily soap, iron hydroxide, alum, and mixtures thereof.
Claim 7
Dependent Claim
13 words
A process according to claim 1 wherein said basic accelerator is sodium hydroxide.
Claim 8
Dependent Claim
12 words
A process according to claim 1 wherein said cement is portland cement.
Claim 9
Dependent Claim
15 words
A process according to claim 1 wherein said pH is raised to at least 10.
Claim 10
Dependent Claim
49 words
A cement composition comprising: (A) about 15 to about 25% of an ion exchange resin; (B) about 1 to about 10% boric acid; (C) about 0.1% to about 0.3% of a fouling agent; (D) a sufficient amount of a basic accelerator to raise the pH to at least 7;
Claim 11
Dependent Claim
49 words
A cement composition comprising: (A) about 15 to about 25% of an ion exchange resin; (B) about 1 to about 10% boric acid; (C) about 0.1% to about 0.3% of a fouling agent; (D) a sufficient amount of a basic accelerator to raise the pH to at least 7;
Claim 12
Dependent Claim
20 words
(E) sufficient cement for a water to cement weight ratio of about 0.4 to 1 to about 0.6 to 1.
Claim 13
Dependent Claim
20 words
(E) sufficient cement for a water to cement weight ratio of about 0.4 to 1 to about 0.6 to 1.
Claim 14
Dependent Claim
21 words
A composition according to claim 10 wherein said ion exchange resin has a particle size of up to about 3 mm.
Claim 15
Dependent Claim
32 words
A composition according to claim 9, wherein said fouling agent is selected from the group consisting of motor oil, hydraulic oil, water-soluble cutting oil, oily soap, iron hydroxide, alum, and mixtures thereof.
Claim 16
Dependent Claim
13 words
A composition according to claim 9, wherein said basic accelerator is sodium hydroxide.
Claim 17
Dependent Claim
13 words
A process according to claim 1 wherein said dissolved solids comprise boric acid.
Claim 18
Dependent Claim
21 words
A process according to claim 1 wherein the particle size of the ion exchange resin is less than about 200 microns.
Claim 19
Dependent Claim
21 words
A composition according to claim 9 wherein the particle size of the ion exchange resin is less than about 200 microns.
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) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |