US3896045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decontamination process for radio-active liquids
Assignee: Belgonucleaire SA
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Filing: 1972-12-21
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Granted: 1975-07-22
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Expires: 1992-12-21
Abstract
Abstract Radio-active liquids and the products thereof are decontaminated by contacting the radio-active liquid with a sorbent in a sulfate-containing medium selected from the group consisting of a barium salt and a barium salt mixed with up to 50 percent of a metal ferrocyanide.
Inventors
- 👤 Karel J A Peeters
- 👤 De Voorde Norbert L C Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:22
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
A METHOD FOR EXTRACTING RADIOACTIVE IONS PRESENT IN TRACER QUANTITIES FROM A CONTAMINATED LIQUID WHICH COMPRISES CONTACTING SAID LIQUID WITH A MIXED SORBENT OF AN INSOLUBLE BARIUM SALT SELECTED FROM THE GROUP CONSISTING OF BARIUM SULFATE AND BARIUM CARBONATE, MIXED WITH UP TO 50 PERCENT OF A METAL FERROCYANIDE IN A SULFATE-CONTAINING MEDIUM.
Claim 2
Independent Claim
53 words
A METHOD FOR EXTRACTING RADIOACTIVE IONS PRESENT IN TRACER QUANTITIES FROM A CONTAMINATED LIQUID WHICH COMPRISES CONTACTING SAID LIQUID WITH A MIXED SORBENT OF AN INSOLUBLE BARIUM SALT SELECTED FROM THE GROUP CONSISTING OF BARIUM SULFATE AND BARIUM CARBONATE, MIXED WITH UP TO 50 PERCENT OF A METAL FERROCYANIDE IN A SULFATE-CONTAINING MEDIUM.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the barium salt is barium sulfate and has a ratio of 3 barium ions to 1 sulfate ion.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein sodium nitrate is added to the barium sulfate in an amount such that the resulting mixture has 1 sodium ion for from 1 to 24 barium ions.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said mixed sorbent contains at least 2 percent metal ferrocyanide.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein the metal ferrocyanide is copper ferrocyanide, manganese ferrocyanide, cobalt ferrocyanide, nickel ferrocyanide or zinc ferrocyanide.
Claim 7
Dependent Claim
33 words
The method of claim 5 wherein the sorbent is from 85-98 percent barium salt which has an excess of barium cations And from 15-2 percent of a metal ferrocyanide in a sulfate-containing medium.
Claim 8
Dependent Claim
46 words
The method of claim 5 wherein said barium salt is barium sulfate having a ratio of 3 barium ions to 1 sulfate ion, and wherein said metal ferrocyanide is copper ferrocyanide having a ratio of 1 copper ion to 1 ferrocyanide ion in a sulfate-containing medium.
Claim 9
Dependent Claim
19 words
The method of claim 6 wherein said mixed sorbent is barium carbonate and copper ferrocyanide in a sulfate-containing medium.
Claim 10
Dependent Claim
30 words
The method of claim 4 wherein said mixed sorbent additionally contains sodium nitrate in an amount such that there is one sodium ion for from 1 to 24 barium ions.
Claim 11
Dependent Claim
30 words
The method of claim 4 wherein said mixed sorbent additionally contains calcium chloride in an amount such that there is 1 calcium ion for from 1 to 20 barium ions.
Claim 12
Dependent Claim
16 words
The method of claim 4 wherein at least 90% of the mixed sorbent is barium carbonate.
Claim 13
Dependent Claim
23 words
The method of claim 1 wherein the contaminated liquids are the regeneration liquids from an ion exchanger previously used for decontaminating radioactive effluents.
Claim 14
Dependent Claim
23 words
The method of claim 4 wherein the contaminated liquids are the regeneration liquids from an ion exchanger previously used for decontaminating radioactive effluents.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |