US4382026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for encapsulating radioactive organic liquids in a resin
Assignee: Dow Chemical Co
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Filing: 1981-01-30
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Granted: 1983-05-03
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Expires: 2001-01-30
Abstract
Abstract Radioactive organic liquids are converted to a form suitable for burial by the process wherein the liquid is contacted with insoluble, swellable polymer particles to form swollen gelled particles which are dispersed in an unsaturated polyester, vinyl ester resin or mixture thereof which is then cured to a solid state with the gelled particles encased therein.
Inventors
- 👤 Stevens S. Drake
- 👤 Harold E. Filter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:13
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/16; G21F9/167
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A process for encapsulating low level radioactive liquid water-insoluble organic wastes into a solid form suitable for burial which comprises contacting one part by weight of said waste with less than one part by weight of a particulate, cross-linked, organic liquid-swellable, organic liquid-insoluble polymer to provide discrete, non-coalescent, gelled particles of said polymer and said waste; dispersing 0.1 to 3 parts of said gelled particles essentially uniformly in one part of a curable liquid resin selected from the group consisting of unsaturated polyesters, vinyl ester resins or mixtures thereof and curing said liquid resin to a solid with said gelled particles encased therein.
Claim 2
Dependent Claim
103 words
A process for encapsulating low level radioactive liquid water-insoluble organic wastes into a solid form suitable for burial which comprises contacting one part by weight of said waste with less than one part by weight of a particulate, cross-linked, organic liquid-swellable, organic liquid-insoluble polymer to provide discrete, non-coalescent, gelled particles of said polymer and said waste; dispersing 0.1 to 3 parts of said gelled particles essentially uniformly in one part of a curable liquid resin selected from the group consisting of unsaturated polyesters, vinyl ester resins or mixtures thereof and curing said liquid resin to a solid with said gelled particles encased therein.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the insoluble polymer is a cross-linked copolymer of tertiary butylstyrene and styrene.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein the copolymer is cross-linked with divinylbenzene.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the liquid organic waste is a hydrocarbon.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein the liquid organic waste is an aqueous dispersion of a radioactive water-insoluble liquid material.
Claim 7
Dependent Claim
31 words
The process of claim 5 wherein said organic liquid-insoluble polymer is added to said aqueous dispersion and the dispersion of water and dispersed gelled particles encapsulated in said curable liquid resin.
Claim 8
Dependent Claim
44 words
The process of claim 5 wherein said organic liquid-insoluble polymer is added to said aqueous dispersion, the phases permitted to separate, the water stirred into said liquid curable resin to form a water-in-resin emulsion and directly thereafter mixing the gelled particles into said emulsion.
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) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |