EP0008552B1 - Procédé de récupération de l'uranium contenu dans une phase organique - Google Patents
Procédé de récupération de l'uranium contenu dans une phase organique Download PDFInfo
- Publication number
- EP0008552B1 EP0008552B1 EP79400553A EP79400553A EP0008552B1 EP 0008552 B1 EP0008552 B1 EP 0008552B1 EP 79400553 A EP79400553 A EP 79400553A EP 79400553 A EP79400553 A EP 79400553A EP 0008552 B1 EP0008552 B1 EP 0008552B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- uranium
- process according
- aqueous
- organic phase
- agent
- 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.)
- Expired
Links
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 73
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000012074 organic phase Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000011084 recovery Methods 0.000 title claims abstract description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000007864 aqueous solution Substances 0.000 claims abstract description 44
- 239000008346 aqueous phase Substances 0.000 claims abstract description 26
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 21
- 230000002829 reductive effect Effects 0.000 claims abstract description 15
- AAORDHMTTHGXCV-UHFFFAOYSA-N uranium(6+) Chemical compound [U+6] AAORDHMTTHGXCV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 50
- 239000002253 acid Substances 0.000 claims description 25
- 238000000605 extraction Methods 0.000 claims description 24
- -1 uranium (IV) ions Chemical class 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 239000012071 phase Substances 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 230000000536 complexating effect Effects 0.000 claims description 19
- 150000002500 ions Chemical class 0.000 claims description 18
- CWYNVVGOOAEACU-UHFFFAOYSA-N iron (II) ion Substances [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 230000003647 oxidation Effects 0.000 claims description 15
- 238000007254 oxidation reaction Methods 0.000 claims description 15
- 238000005868 electrolysis reaction Methods 0.000 claims description 10
- 238000011282 treatment Methods 0.000 claims description 10
- 239000003085 diluting agent Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 239000003350 kerosene Substances 0.000 claims description 7
- 230000002195 synergetic effect Effects 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 6
- 125000002091 cationic group Chemical group 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- ZMBHCYHQLYEYDV-UHFFFAOYSA-N trioctylphosphine oxide Chemical compound CCCCCCCCP(=O)(CCCCCCCC)CCCCCCCC ZMBHCYHQLYEYDV-UHFFFAOYSA-N 0.000 claims description 5
- 150000007513 acids Chemical class 0.000 claims description 4
- SEGLCEQVOFDUPX-UHFFFAOYSA-N di-(2-ethylhexyl)phosphoric acid Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC SEGLCEQVOFDUPX-UHFFFAOYSA-N 0.000 claims description 4
- HNVACBPOIKOMQP-UHFFFAOYSA-N uranium(4+) Chemical compound [U+4] HNVACBPOIKOMQP-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 239000003701 inert diluent Substances 0.000 claims description 3
- 235000021317 phosphate Nutrition 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000000129 anionic group Chemical group 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 235000011007 phosphoric acid Nutrition 0.000 claims 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims 1
- 238000010924 continuous production Methods 0.000 claims 1
- 235000011167 hydrochloric acid Nutrition 0.000 claims 1
- 150000003335 secondary amines Chemical class 0.000 claims 1
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 150000003512 tertiary amines Chemical class 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 55
- 229910052742 iron Inorganic materials 0.000 description 31
- 239000002265 redox agent Substances 0.000 description 10
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 9
- 239000007800 oxidant agent Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- BPWXJCCABQQWQA-UHFFFAOYSA-N dioctan-4-yl hydrogen phosphate Chemical compound CCCCC(CCC)OP(O)(=O)OC(CCC)CCCC BPWXJCCABQQWQA-UHFFFAOYSA-N 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000000622 liquid--liquid extraction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000003014 ion exchange membrane Substances 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910000923 precious metal alloy Inorganic materials 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 125000005289 uranyl group Chemical class 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000013628 Lantana involucrata Nutrition 0.000 description 1
- 235000006677 Monarda citriodora ssp. austromontana Nutrition 0.000 description 1
- 229920000557 Nafion® Polymers 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical class O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 240000007673 Origanum vulgare Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QZFSKKACWMIODD-UHFFFAOYSA-N [U+4].[U+6] Chemical compound [U+4].[U+6] QZFSKKACWMIODD-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000003973 alkyl amines Chemical group 0.000 description 1
- 125000005600 alkyl phosphonate group Chemical group 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- TXNIZLJHVRLBEM-UHFFFAOYSA-N bis(2-ethylhexyl) hydrogen phosphate;1-dioctylphosphoryloctane Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC.CCCCCCCCP(=O)(CCCCCCCC)CCCCCCCC TXNIZLJHVRLBEM-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Inorganic materials [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 239000012747 synergistic agent Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
- C22B60/02—Obtaining thorium, uranium, or other actinides
- C22B60/0204—Obtaining thorium, uranium, or other actinides obtaining uranium
- C22B60/0217—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes
- C22B60/0252—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries
- C22B60/026—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries liquid-liquid extraction with or without dissolution in organic solvents
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
Definitions
- the present invention relates to a process for recovering uranium contained in a complexing organic phase and it relates more particularly to the concentration and purification of uranium extracted from a wet phosphoric acid.
- the extraction agent as defined above can be combined with a well-known synergistic extraction agent such as, for example, alkylphosphates, alkylphosphonates, alkylphosphinates or trialkylphosphine oxides.
- a well-known synergistic extraction agent such as, for example, alkylphosphates, alkylphosphonates, alkylphosphinates or trialkylphosphine oxides.
- a well-known synergistic extraction agent such as, for example, alkylphosphates, alkylphosphonates, alkylphosphinates or trialkylphosphine oxides.
- a well-known synergistic extraction agent such as, for example, alkylphosphates, alkylphosphonates, alkylphosphinates or trialkylphosphine oxides.
- the organic phase contains, where appropriate, an organic diluent which is inert towards the extractants in order to improve the hydrodynamic properties of the organic phase.
- organic diluent which is inert towards the extractants in order to improve the hydrodynamic properties of the organic phase.
- many organic solvents or their mixtures can be used as a diluent.
- aliphatic hydrocarbons such as kerosene, aromatic, halogenated and petroleum ethers, etc.
- the characteristics of the inert diluent are not critical although some have advantages under particular conditions. 'use.
- the starting organic phase contains uranium at the oxidation state (VI), taking into account the conditions for producing this solution. It also contains other chemical species depending on its production conditions. Especially in the case of a solution obtained by liquid-liquid extraction of a crude wet phosphoric acid, it usually contains phosphoric acid and other anions and metal cations such as AI, Fe, Ti, V , etc ... in the weakly concentrated state.
- the uranium concentration of the organic phase is generally between 20 and 3000 mg expressed as metal uranium per liter of phase, preferably between 50 and 500 mg per liter.
- the aqueous solution contains iron with the degree of oxidation (II).
- the solution In order to shift the equilibrium of the reaction between the ions U (VI) and Fe (II) on the one hand and U (IV) and Fe (III) on the other hand, in the direction favorable to the production of ions U (IV), the solution should contain a large excess of iron (II) ion compared to uranium ions.
- the concentration of the iron solution in the oxidation state (II) is usually between 0.5 and 100 grams per liter.
- the concentration of strong acid in the solution can vary within wide limits.
- the organic phase containing the uranium at the oxidation state (VI) and the aqueous solution which have been described above, are brought into contact in a conventional liquid-liquid extraction apparatus.
- This contacting can be carried out in mixers- decanters, packed or pulsed columns, or any other suitable device, the contact being co-current or counter-current.
- the temperature during contacting is not critical but for practical reasons it is preferred to operate between 20 ° C and 80 ° C, preferably in the vicinity of 50 ° C.
- the iron of this added solution can be in the form of iron (II) or iron (III) ions and can come from either iron present in phosphoric acid, or iron (II) or iron (III) salt added to this solution, or iron attack by phosphoric acid.
- Anodic compartments (13) leaves an aqueous solution which is sent to a storage not shown and containing, where appropriate, the complexing acid, uranium in the concentrated state substantially in U (VI) and l oxidizing agent in the oxidized state, which constitutes the production. This solution then undergoes subsequent treatments to recover the uranium.
- the aqueous contact extraction solution comprises a strong and complexing acid and an oxidoreducing agent consisting of iron ions.
- an oxidoreducing agent consisting of iron ions.
- another redox agent it is possible to use another redox agent provided that it satisfies the requirements required above.
- an aqueous phase (35) containing uranium (IV), iron (II) and iron (III) is removed.
- This stream is divided into two streams (36) and (37).
- Current (36) feeds the cathode compartments of a first battery of electrolytic elements schematically represented by (38).
- This current after reduction, constitutes the current (39) which partially supplies the first contact zone (31).
- the current (37) successively supplies the anode compartments of a second battery of electrolysis elements represented diagrammatically by (40) and then by the current (41) the anode compartments (42) of the first battery of electrolytic elements already mentioned. From the compartments (42) there flows a current (43) which constitutes the production and which is sent to storage, not shown.
- the organic phase stream (32) is brought into contact with an aqueous solution (44) containing the complexing acid, iron (II) and iron (III) and a small proportion of 'uranium (IV).
- an aqueous phase is removed from the zone (33) which is divided into a current (45) which feeds together with the current (39) described above, the first contact zone, and into a current (46), which after adding a fresh current containing the complexing acid and iron ions supplies the cathode compartments of the second battery of electrolytic elements already mentioned, and represented schematically by (48).
- the material balance requires that the amounts of complexing acid and iron entering by the stream (47) are equal to those leaving in the production stream (43).
- aqueous phase (61) enriched in uranium (IV) which is sent entirely into the anode compartments of the battery of electrolytic elements represented diagrammatically by (62), from which an aqueous stream (63) enriched in uranium (VI) is recovered which constitutes the production and which is sent to a storage not shown.
- this mode may include the optional variant of processing the production by means of a very small quantity of chemical oxidizing agent.
- a derivative current (75) is withdrawn from the last mixer-settler which is reintroduced into the first mixer-settler of said battery in order to form a loop. recycling (75-74).
- the current (76) feeds the anode compartments of said battery of electrolytic elements, which are schematically represented by (77) and exits by the current (78) which constitutes the production.
- This stream enriched in uranium (VI) is sent to storage for further processing.
- the embodiment of FIG. 5 can optionally comprise the treatment of the production stream (78) by means of a very small quantity of chemical oxidizing agent.
- the current (18) feeds the anode compartment (24) of the electrolysis cell.
- Phase (30) is brought into contact with an aqueous solution which is the union of two streams, on the one hand stream (39) with a flow rate of 5 liters per hour of the following composition: and on the other hand, of a current (45) which will be explained below.
- a solution of kerosene containing 0.5 mol / l of di (ethyl-2-hexyl) phosphoric acid, 0.125 mol / l of trioctylphosphine oxide and 150 mg / l of U (VI) ions is introduced in (70). ).
- the flow rate is 41 / h, the temperature 55 ° C.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Extraction Or Liquid Replacement (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Electrolytic Production Of Metals (AREA)
- Ceramic Products (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Processing Of Solid Wastes (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT79400553T ATE187T1 (de) | 1978-08-17 | 1979-08-03 | Verfahren zur rueckgewinnung von uran aus einer organischen phase. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7823950A FR2433587A1 (fr) | 1978-08-17 | 1978-08-17 | Procede de recuperation de l'uranium contenu dans une phase organique |
FR7823950 | 1978-08-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0008552A1 EP0008552A1 (fr) | 1980-03-05 |
EP0008552B1 true EP0008552B1 (fr) | 1981-09-02 |
Family
ID=9211858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79400553A Expired EP0008552B1 (fr) | 1978-08-17 | 1979-08-03 | Procédé de récupération de l'uranium contenu dans une phase organique |
Country Status (16)
Country | Link |
---|---|
US (1) | US4341602A (xx) |
EP (1) | EP0008552B1 (xx) |
JP (1) | JPS5541992A (xx) |
AT (1) | ATE187T1 (xx) |
BR (1) | BR7905261A (xx) |
CA (1) | CA1127995A (xx) |
DE (1) | DE2960742D1 (xx) |
EG (1) | EG14862A (xx) |
ES (1) | ES483424A1 (xx) |
FI (1) | FI68664C (xx) |
FR (1) | FR2433587A1 (xx) |
GR (1) | GR69708B (xx) |
IL (1) | IL58056A (xx) |
MA (1) | MA18565A1 (xx) |
SU (1) | SU1058511A3 (xx) |
ZA (1) | ZA794288B (xx) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2450233A1 (fr) * | 1979-02-28 | 1980-09-26 | Rhone Poulenc Ind | Procede de recuperation de l'uranium contenu dans un acide phosphorique impur |
US4397820A (en) * | 1980-07-24 | 1983-08-09 | Wyoming Mineral Corporation | Method to maintain a high Fe+2 /Fe+3 ratio in the stripping system for the recovery of uranium from wet process phosphoric acid |
US4578249A (en) * | 1983-09-02 | 1986-03-25 | International Minerals & Chemical Corp. | Process for recovery of uranium from wet process H3 PO4 |
DE3345199A1 (de) * | 1983-12-14 | 1985-06-27 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Verfahren zur reduktiven plutonium-rueckextraktion aus einer organischen wiederaufarbeitungsloesung in eine waessrige, salpetersaure loesung unter anwendung eines elektrolysestromes |
GB8719045D0 (en) * | 1987-08-12 | 1987-10-07 | Atomic Energy Authority Uk | Liquid treatment process |
US8883096B2 (en) | 2008-07-31 | 2014-11-11 | Urtek, Llc | Extraction of uranium from wet-process phosphoric acid |
KR101389877B1 (ko) | 2008-07-31 | 2014-04-29 | 우르텍, 엘엘씨 | 습식 공정 인산으로부터 우라늄의 추출 |
FR2965056B1 (fr) * | 2010-09-16 | 2013-05-10 | Areva Nc | Procede de mesure de la concentration en uranium d'une solution aqueuse par spectrophotometrie |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2843450A (en) * | 1955-01-18 | 1958-07-15 | Jr Harold W Long | Method of recovering uranium mineral values |
US2790702A (en) * | 1955-06-21 | 1957-04-30 | Robert F Mccullough | Acid treatment of phosphate rock to recover phosphates and uranium |
FR1397587A (fr) * | 1964-05-04 | 1965-04-30 | Le Ministre De La Defense | Perfectionnements apportés aux procédés pour l'extraction d'uranium |
US3616276A (en) * | 1969-04-14 | 1971-10-26 | Allied Chem | Process for changing the valence of a metal of variable valence in an organic solution |
US3737513A (en) * | 1970-07-02 | 1973-06-05 | Freeport Minerals Co | Recovery of uranium from an organic extractant by back extraction with h3po4 or hf |
US3711591A (en) * | 1970-07-08 | 1973-01-16 | Atomic Energy Commission | Reductive stripping process for the recovery of uranium from wet-process phosphoric acid |
US3770612A (en) * | 1970-08-24 | 1973-11-06 | Allied Chem | Apparatus for electrolytic oxidation or reduction, concentration, and separation of elements in solution |
BE771349R (en) * | 1971-08-16 | 1971-12-31 | Allied Chem | Concentrating metals - by preferential soln for different valencies of the metal |
BE771350R (en) * | 1971-08-16 | 1971-12-31 | Allied Chem | Metal transfer - from organic soln to aqs soln by electrochemical oxidation or reduction |
DE2261018C3 (de) * | 1972-12-13 | 1981-02-05 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Gegenstromextraktrionskolonne zur Flüssig-Flüssig-Extraktion bei gleichzeitiger Elektrolyse |
DE2449590C3 (de) * | 1974-10-18 | 1980-06-12 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Verfahren zur Reinigung von in niedrigen Oxidationszuständen befindlichen Aktiniden |
US4234393A (en) * | 1979-04-18 | 1980-11-18 | Amax Inc. | Membrane process for separating contaminant anions from aqueous solutions of valuable metal anions |
-
1978
- 1978-08-17 FR FR7823950A patent/FR2433587A1/fr active Granted
-
1979
- 1979-08-03 EP EP79400553A patent/EP0008552B1/fr not_active Expired
- 1979-08-03 DE DE7979400553T patent/DE2960742D1/de not_active Expired
- 1979-08-03 AT AT79400553T patent/ATE187T1/de not_active IP Right Cessation
- 1979-08-10 US US06/065,504 patent/US4341602A/en not_active Expired - Lifetime
- 1979-08-15 EG EG500/79A patent/EG14862A/xx active
- 1979-08-15 ZA ZA00794288A patent/ZA794288B/xx unknown
- 1979-08-15 IL IL58056A patent/IL58056A/xx unknown
- 1979-08-15 SU SU792800306A patent/SU1058511A3/ru active
- 1979-08-16 CA CA333,928A patent/CA1127995A/fr not_active Expired
- 1979-08-16 BR BR7905261A patent/BR7905261A/pt unknown
- 1979-08-16 JP JP10362879A patent/JPS5541992A/ja active Granted
- 1979-08-16 GR GR59840A patent/GR69708B/el unknown
- 1979-08-16 ES ES483424A patent/ES483424A1/es not_active Expired
- 1979-08-16 MA MA18764A patent/MA18565A1/fr unknown
- 1979-08-16 FI FI792545A patent/FI68664C/fi not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EG14862A (en) | 1985-06-30 |
GR69708B (xx) | 1982-07-09 |
FI68664C (fi) | 1985-10-10 |
ES483424A1 (es) | 1980-05-16 |
JPS6135256B2 (xx) | 1986-08-12 |
FI792545A (fi) | 1980-02-18 |
ATE187T1 (de) | 1981-09-15 |
SU1058511A3 (ru) | 1983-11-30 |
IL58056A (en) | 1983-05-15 |
US4341602A (en) | 1982-07-27 |
FR2433587A1 (fr) | 1980-03-14 |
EP0008552A1 (fr) | 1980-03-05 |
ZA794288B (en) | 1980-09-24 |
CA1127995A (fr) | 1982-07-20 |
FI68664B (fi) | 1985-06-28 |
JPS5541992A (en) | 1980-03-25 |
DE2960742D1 (en) | 1981-11-26 |
MA18565A1 (fr) | 1980-04-01 |
BR7905261A (pt) | 1980-05-06 |
FR2433587B1 (xx) | 1981-01-09 |
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