US4122048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for conditioning contaminated ion-exchange resins
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1977-08-05
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Granted: 1978-10-24
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Expires: 1997-08-05
Abstract
Abstract Process for conditioning contaminated ion-exchange resins, more particularly contaminated cationic resins, wherein the contaminated ion-exhange resin or resins are brought into contact with a basic compound in a sufficient quantity to block the active sites of the cationic resin or resins, the thus treated ion-exchange resin or resins are incorporated into an ambient temperature-thermosetting resin and the latter is crosslinked.
Inventors
- 👤 Michel Buchwalder
- 👤 Roger Perrin
- 👤 Daniel Thiery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:26
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/28; G21F9/30; G21F9/301; G21F9/307
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
71 words
A process for conditioning contaminated ion-exchange resins selected from the group consisting of cationic or a mixture of cationic and anionic resins, wherein the contaminated ion-exchange resin or resins are brought into contact with a basic compound in a sufficient quantity to block the active sites of the cationic resin or resins, the thus treated ion-exchange resin or resins are incorporated into an ambient temperature-thermosetting resin and the latter is cross-linked.
Claim 2
Dependent Claim
71 words
A process for conditioning contaminated ion-exchange resins selected from the group consisting of cationic or a mixture of cationic and anionic resins, wherein the contaminated ion-exchange resin or resins are brought into contact with a basic compound in a sufficient quantity to block the active sites of the cationic resin or resins, the thus treated ion-exchange resin or resins are incorporated into an ambient temperature-thermosetting resin and the latter is cross-linked.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1, wherein the basic compound comprises a metallic hydroxide chosen from the group consisting of soda, ammonia and lime.
Claim 4
Dependent Claim
30 words
A process as claimed in claim 1, wherein the basic compound comprises a metal salt chosen from the group consisting of aluminium chloride, sodium acetate, sodium citrate and sodium oxalate.
Claim 5
Dependent Claim
14 words
A process as claimed in claim 1, wherein the basic compound comprises an amine.
Claim 6
Dependent Claim
20 words
A process as claimed in claim 1, wherein the basic compound is used in the form of an aqueous solution.
Claim 7
Dependent Claim
15 words
A process as claimed in claim 1, wherein the thermosetting resin comprises a polyester resin.
Claim 8
Dependent Claim
24 words
A process as claimed in claim 1, wherein one part of the thus treated ion-exchange resins is incorporated into one part of thermosetting resin.
Claim 9
Dependent Claim
40 words
A process as claimed in claim 1, wherein the treatment of the ion-exchange resin or resins by a basic compound is effected by passing a solution of said basic compound over the ion-exchange resin or resins placed in a column.
Claim 10
Dependent Claim
36 words
A process as claimed in claim 1, wherein the treatment of the ion-exchange resin or resins by a basic compound is effected by mixing in a container said ion-exchange resin or resins with said basic compound.
Claim 11
Dependent Claim
15 words
A process as claimed in claim 1, wherein said ion-exchange resin is a cationic resin.
Claim 12
Dependent Claim
12 words
A process as claimed in claim 4, wherein the amine is pyridine.
Claim 13
Dependent Claim
18 words
A process as claimed in claim 6, wherein the polyester resin is a glycol-maleophthalate-based resin mixed with styrene.
Claim 14
Dependent Claim
19 words
A process as claimed in claim 5, wherein said solution has a molarity of from 0.1 to 10 M.
Claim 15
Dependent Claim
33 words
A process as claimed in claim 1, wherein said ion-exchange resin is a polystyrene resin cross-linked with divinylbenzene having either (1) sulphonic groups or (2) hydroxy functions fixed to a quaternary ammonium group.
Claim 16
Dependent Claim
15 words
A process as claimed in claim 1, wherein the thermosetting resin is an epoxy resin.
Claim 17
Dependent Claim
15 words
A process as claimed in claim 1, wherein the thermosetting resin is a phenoplast resin.
References Cited (Backward Citations)
US3627705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |