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JPS5812263B2 |
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JPS589770B2 |
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JPS5815033A |
PURPOSE: To efficiently obtain uranium by allowing uranium in seawater to be absorbed on magnetic fine powder as an adsorbent, separating the adsorbent from the seawater by magnetic separation, and fluidizing it in a circulation system t...
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JPS589824A |
A liquid membrane emulsion extraction process for recovering uranium from a WPPA feed solution containing uranyl cations wherein said feed is contacted with a water-in-oil emulsion which extracts and captures the uranium in the interior ...
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JPS589825A |
A liquid membrane emulsion extraction process for recovering uranium from a WPPA feed solution containing U(IV) cations wherein said feed is contacted with a water-in-oil emulsion which extracts and captures the uranium in interior aqueo...
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JPS589823A |
An emulsion extraction process for recovering uranium from a WPPA feed solution containing uranyl cations wherein the WPPA feed is contacted with a water-in-oil emulsion which extracts and captures the uranium in the emulsion, wherein th...
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JPS5760291B2 |
In a process for converting UF6 into UO2, the UF6 is brought into contact with an aqueous aluminum nitrate solution. The resultant product is solvent extracted with tributyl phosphate to remove uranyl nitrate. The raffinate has a fluorin...
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JPS5758986B2 |
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JPS5758979B2 |
An anion exchange column, containing anion exchange resin particles with uniform degree of sphericity, restricted average diameter and uniform particle size distribution and having devices for flowing a liquid uniformly, is suitably used...
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JPS5758977B2 |
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JPS5758978B2 |
An anion exchange resin particle provided with specific structure as well as specific functional groups is found to be suitable for uranium technology, especially for separation of uranium isotopes.
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JPS5758980B2 |
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JPS57200226A |
A process is described for the recovery of tetravalent uranium from wet-process phosphoric acid utilizing an alkyl pyrophosphoric acid extractant or the like. After extracting the tetravalent uranium from wet-process acid, iron is stripp...
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JPS57200225A |
Method of recovering uranium from a silicate-uranium coprecipitate by leaching the coprecipitate with a leachate having a pH of from 2 to 3, followed by filtering the coprecipitate. The uranium is dissolved in the filtrate but the silica...
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JPS5753422B2 |
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JPS57175730A |
A process is described for the recovery of uranium from wet-process phosphoric acid utilizing an alkyl pyrophosphoric extractant. The extractant also contains a modifier for retaining the alkyl pyrophosphoric acid in solution in an essen...
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JPS5741974B2 |
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JPS57136401U |
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JPS57134530A |
PURPOSE: To eliminate complex pH operation and to enhance the extraction efficiency by making the pH of an extracting soln. flowing from a washing process to a back extracting process alkaline to such a degree that washing waste water is...
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JPS57123938A |
A process for treating water containing chemicals comprising ammonium nitrate, fluorides, hydrogen peroxide and uranium compounds, wherein valuable and/or hazardous components of the chemicals-containing water are separated therefrom and...
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JPS57123939A |
A process for the selective concentration of uranium from sea water through chemical accumulation onto a solid adsorption medium, which does not necessitate any H+ions for regeneration, in particular onto titanium oxide hydrate and subse...
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JPS57118032A |
A uranium containing concentrate and phosphoric acid are obtained by digesting phosphate rock with H2SO4 and treating the H3PO4-solution - remaining after removal of calciumsulphate -, if so desired after evaporation, with a reducing age...
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JPS57110324A |
Process for the recovery of uranium (VI) present in a phosphoric acid solution by contacting the latter with an organic solvent able to extract uranium, the organic solvent comprising a system of extractants constituted by a neutral phos...
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JPS57107245A |
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JPS5729413B2 |
Uranium is separated from contaminating metal ions in an aqueous feed liquor containing the uranyl ion. The liquor is extracted with a first, non-interfering, waterimmiscible, organic solvent containing a reagent which reacts with the ur...
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JPS5727043B2 |
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JPS5778943A |
PURPOSE: To obtain an uranium adsorbent having a large specific surface area and a large pore diameter by a method in which a titanium compound and a metal compound are mixed and then coprecipitated in such a way that hydrated oxides oth...
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JPS5775140A |
PURPOSE: To improve the strength and adsoptive power of an uranium adsorpbent by depositing a titanic acid on a carrier made by adding a small amt. of an inorg. binder to a porous carbon material and granulating the same in such a way as...
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JPS5760041A |
A process for the recovery of uranium values from uranium-containing material which also contains iron, arsenic and siliceous matter, includes leaching the uranium-containing material in aqueous sulphuric acid solution under conditions t...
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JPS5751609U |
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JPS5713321B2 |
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JPS5711252B2 |
Loaded solid resin particles obtained as an output slurry from a continuous fluid/solid contactor are stripped by counter-current elution in which discrete measured batches of the loaded resin are isolated, each batch is drained of its c...
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JPS5718800A |
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JPS5718690A |
A water insoluble ion exchange resin having a crosslinked, three dimensional resin skeleton and an active group of the formula: wherein R is selected from the group consisting of hydrogen and an alkyl radical having 1-15 carbon atoms and...
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JPS575319B2 |
PURPOSE:To remove and recover uranium, thorium by high yield from the waste liquid extracted from a nuclear fuel producing plant etc.
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JPS577207A |
A method and system for continuously extracting metals from sea water by deploying adsorber sheets in a suitable current of sea water, recovering the adsorber sheets after they become loaded with metal and eluting the metal from the reco...
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JPS5651016B2 |
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JPS56155643A |
Process for the preparation of an adsorbent material, wherein it consists of preparing an aqueous solution of an alkali metal silicate and a compound selected from the group comprising alkali metal hydroxides and ammonia, mixing the solu...
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JPS5643778B2 |
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JPS56111051A |
PURPOSE: A treating material which is obtained by mixing specific titanium acid, sulfuric acid and water at specific proportions, and granulating the same then applying heat treatment thereto and which removes and recovers radium and ura...
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JPS56104717A |
Wet process phosphoric acid is oxidized with nitric acid so that uranium values therein are in the +6 state. The organic extractant which contacts the acid extracts the +6 uranium and nitrate and/or nitrite ions. Urea is added to the oxi...
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JPS56100140A |
The invention concerns a method for the liquid/liquid extraction of uranium from phosphoric acid with the aid of alkylamine polyphosphate and/or alkylamine metaphosphate compounds, dissolved in organic solvents insoluble in water. The ur...
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JPS56100139A |
The invention concerns a method for the liquid/liquid extraction of uranium from phosphoric acid with the aid of alkylamine polyphosphate and/or alkylamine metaphosphate compounds, dissolved in organic solvents insoluble in water, in the...
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JPS5693833A |
A method and apparatus for the continuous production of metals and/or carbides by thermal reduction is described. In the process, a mixture of metal oxide and carbon is agglomerated, each piece of agglomerate encased in carbon and/or gra...
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JPS5632256B2 |
A method is provided for purifying actinides which are present in a low oxidation state in aqueous solution. The actinides are purified of fission products by extracting the actinides from aqueous solution while confining the fission pro...
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JPS5691839A |
PURPOSE: To collect uranium in sea water efficiently by simple means by a method wherein an uranium adsorbing substance such as a titanic acid particle is laminated on a flexible striplike sheet material and the obtained laminate is imme...
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JPS5631135B2 |
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JPS5684320A |
PURPOSE: To efficiently desorb uranium adsorbed on an adsorbent by bringing the adsorbent into contact with a phosphoric acid soln. CONSTITUTION: Uranium adsorbed on an adsorbent is efficiently desorbed with a phosphoric acid soln. to ma...
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JPS5676210A |
PURPOSE: To adsorb and collect uranium in seawater, by a method wherein an adsorption agent is held in a net-rope structure which is in the sea near the sea level, and the sea water passes through the adsorption agent due to the movement...
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JPS5672070A |
PURPOSE: An uranyl ion trapping agent comprising a specified macrocyclic hexacarboxylic acid. CONSTITUTION: A macrocyclic hexacarboxylic acid of formula I [wherein X1, X3 and X5 are -COOH, formula II (where R1 is H, an alkyl or aromatic ...
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