EP0295279A1 - Procede pour decontaminer des liquides charges radioactivement - Google Patents
Procede pour decontaminer des liquides charges radioactivementInfo
- Publication number
- EP0295279A1 EP0295279A1 EP88900344A EP88900344A EP0295279A1 EP 0295279 A1 EP0295279 A1 EP 0295279A1 EP 88900344 A EP88900344 A EP 88900344A EP 88900344 A EP88900344 A EP 88900344A EP 0295279 A1 EP0295279 A1 EP 0295279A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricating oil
- radionuclides
- precipitation
- salt solution
- elements whose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 title claims description 11
- 239000010687 lubricating oil Substances 0.000 claims abstract description 21
- 238000001556 precipitation Methods 0.000 claims abstract description 11
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- 239000008346 aqueous phase Substances 0.000 claims abstract description 4
- 238000005119 centrifugation Methods 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 238000005202 decontamination Methods 0.000 claims description 8
- 230000003588 decontaminative effect Effects 0.000 claims description 8
- 239000012266 salt solution Substances 0.000 claims description 8
- 230000002285 radioactive effect Effects 0.000 claims description 7
- 150000008043 acidic salts Chemical class 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- 230000002378 acidificating effect Effects 0.000 abstract 2
- 239000011872 intimate mixture Substances 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 description 5
- 229910001429 cobalt ion Inorganic materials 0.000 description 4
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000003929 acidic solution Substances 0.000 description 3
- 150000001868 cobalt Chemical class 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 241000212384 Bifora Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010698 whale oil Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/10—Processing by flocculation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S494/00—Imperforate bowl: centrifugal separators
- Y10S494/901—Imperforate bowl: centrifugal separators involving mixture containing oil
Definitions
- the invention relates to a method for decontaminating radioactive liquids.
- the invention has for its object the above-mentioned method for the decontamination of lubricant to train oil.
- an acidic solution - preferably in aqueous sulfuric acid - of a salt of the element or the elements, the radionuclides of which are to be removed, to the lubricating oil to be decontaminated, which is initially to be mechanically filtered at first.
- a 2% sulfuric acid in which cobalt chloride is dissolved can be added.
- This acidic solution of the salt is intimately mixed with the lubricating oil over a long period to form an emulsion, preferably with simultaneous heating.
- the sulfuric acid causes a dissociation of the metal oxides and the other metal salts in the aqueous sulfuric acid phase of the lubricating oil emulsion.
- an aqueous solution of a salt of a precipitation partner of the element, the radionuclides of which are to be removed (in the example, the cobalt) is added in metered amounts, which may be sodium sulfide, for example.
- metered amounts which may be sodium sulfide, for example.
- An intimate mixing of this salt is again carried out now, preferably with simultaneous heating.
- the increase in the number of cobalt ions in the lubricating oil by the addition of the cobalt salt in the first stage causes the solubility limit to be exceeded safely and thus enables suitable precipitation.
- the precipitation products are then separated from the lubricating oil, preferably using a centrifuge.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Lubricants (AREA)
- Dairy Products (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
Procédé pour décontaminer de l'huile de graissage chargée radioactivement, dans lequel a) on filtre mécaniquement l'huile de graissage à décontaminer, b) on ajoute une solution saline acide des éléments dont les radionucléides doivent être éliminées, et c) on ajoute une dose d'un agent de précipitation qui coopère avec les éléments dont les radionucléides doivent être éliminées, pour produire un sel difficilement soluble, d) la solution saline acide est intimement mélangée avec l'huile de graissage après l'étape b), e) la phase aqueuse qui se dépose est évacuée après l'étape b) et avant l'étape c), et f) un nouveau mélange intime est effectué après l'adjonction dosée de l'étape c), et g) finalement les produits de précipitation sont séparés de l'huile de graissage par centrifugation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3644396A DE3644396C1 (de) | 1986-12-24 | 1986-12-24 | Verfahren zur Dekontamination radioaktiv belasteter Fluessigkeiten |
| DE3644396 | 1986-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0295279A1 true EP0295279A1 (fr) | 1988-12-21 |
Family
ID=6317162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88900344A Ceased EP0295279A1 (fr) | 1986-12-24 | 1987-12-21 | Procede pour decontaminer des liquides charges radioactivement |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4925597A (fr) |
| EP (1) | EP0295279A1 (fr) |
| JP (1) | JPH01502692A (fr) |
| DE (1) | DE3644396C1 (fr) |
| WO (1) | WO1988005204A2 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076936A (en) * | 1990-02-21 | 1991-12-31 | Southern California Edison Co. | Processing mixed waste |
| US5196113A (en) * | 1990-02-21 | 1993-03-23 | Southern California Edison Co. | Processing mixed waste |
| DE69506916T2 (de) * | 1995-01-12 | 1999-08-05 | Bernatom S.A.R.L., Rouhling | Verfahren zur reduktion von radioaktiven abfällen wie insbesondere ölen oder lösungsmitteln und anwendung dieses verfahrens zur behandlung eines aktivierten öls |
| US5516969A (en) * | 1995-01-23 | 1996-05-14 | Ontario Hydro | Waste oil decontamination process |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1409763A (en) * | 1921-06-15 | 1922-03-14 | Ernest Nalle | Centrifugal separator |
| US1908616A (en) * | 1930-01-13 | 1933-05-09 | Cross Dev Corp | Process for removing impurities from oil |
| US2852438A (en) * | 1956-03-02 | 1958-09-16 | Sun Oil Co | Acid-clay treatment of petroleum fractions using centrifugal force |
| US3094570A (en) * | 1960-05-18 | 1963-06-18 | California Research Corp | C10-c20 alpha-olefin treatment with h2so4 for removal of free radical inhibitors |
| DE1218964B (de) * | 1963-03-20 | 1966-06-08 | Heinz Riesenhuber Dr | Abtrennung radioaktiver Ionen aus ihren Loesungen |
| US3265614A (en) * | 1964-01-13 | 1966-08-09 | Petrolite Corp | Removal of sulfur bodies |
| FR1584018A (fr) * | 1968-07-09 | 1969-12-12 | ||
| GB2073477A (en) * | 1980-03-28 | 1981-10-14 | British Nuclear Fuels Ltd | Waste treatment |
| DE3318377C2 (de) * | 1983-05-20 | 1986-05-15 | Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH, 3000 Hannover | Verfahren zur Dekontamination von radioaktiv kontaminiertem Eisen- und/oder Stahlschrott |
| US4615794A (en) * | 1984-08-20 | 1986-10-07 | Belanger Roger L | Method of removing radioactive waste from oil |
| US4552646A (en) * | 1984-12-24 | 1985-11-12 | Phillips Petroleum Company | Dearsenating of shale oil with metal chlorates |
| DE3513943A1 (de) * | 1985-04-18 | 1986-10-23 | Dornier System Gmbh, 7990 Friedrichshafen | Verfahren zur verbesserung der abtrennwirkung beim abtrennen radioaktiver isotope in elementarer oder chemisch gebundener form aus fluessigkeiten und gasen |
-
1986
- 1986-12-24 DE DE3644396A patent/DE3644396C1/de not_active Expired
-
1987
- 1987-12-21 JP JP63500514A patent/JPH01502692A/ja active Pending
- 1987-12-21 EP EP88900344A patent/EP0295279A1/fr not_active Ceased
- 1987-12-21 US US07/275,137 patent/US4925597A/en not_active Expired - Fee Related
- 1987-12-21 WO PCT/DE1987/000604 patent/WO1988005204A2/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8805204A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1988005204A3 (fr) | 1988-08-25 |
| DE3644396C1 (de) | 1988-02-11 |
| WO1988005204A2 (fr) | 1988-07-14 |
| US4925597A (en) | 1990-05-15 |
| JPH01502692A (ja) | 1989-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19880818 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH FR GB LI SE |
|
| 17Q | First examination report despatched |
Effective date: 19900921 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
| 18R | Application refused |
Effective date: 19911219 |