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JPS6058175B2 |
The uranium, yttrium, thorium and rare earth values contained in a phosphate rock are essentially totally recovered therefrom by, during the wet-process preparation of phosphoric acid from said phosphate rock, acidulating same in the pre...
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JPS60255624A |
A method for treating process waste consisting of uranium hexafluoride, UF6, molybdenum hexafluoride, MoF6 and molybdenum oxytetrafluoride, MoOF4 is provided wherein the foregoing mixture is hydrolyzed in an aqueous solution of ammonium ...
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JPS6055800B2 |
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JPS6055447B2 |
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JPS6055446B2 |
PURPOSE:To recover uranium inexpensively and simply from wet process phosphoric acid in a high yield by adding an alkaline earth metallic compound to the phosphoric acid, further adding gypsum dihydrate, and capturing uranium in a hemihy...
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JPS6055448B2 |
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JPS6055445B2 |
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JPS6054088B2 |
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JPS6053160B2 |
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JPS6052859B2 |
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JPS6051491B2 |
A phenolic chelate resin has a chelate-forming group, wherein hydrogen atoms in a primary or secondary alkylamino group introduced in a phenol nucleus are substituted by a methylenephosphonate group. The phenolic chelate resin is pro...
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JPS6051390B2 |
A macromolecular adsorbent is suitable for recovering heavy metal ions such as uranium ions from a dilute solution such as sea water and is a polymer having pendant groups having the formula wherein R1 represent a C1-C8 divalent organic ...
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JPS6051378B2 |
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JPS6051379B2 |
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JPS6050722B2 |
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JPS6048206B2 |
A counterflow extraction column for the liquid-liquid extraction of two phases during simultaneous electrolysis, includes an elongated, upright column tube containing a cathode and an anode. Within the tube, a common chamber defines cath...
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JPS6047317B2 |
New diphosphonic acid diesters in which the two phosphorus atoms are bound by a hydrocarbon group while each of the two acid functions of the diphosphonate is esterified by a radical having at least three carbon atoms are suitable for va...
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JPS60186795A |
A process for reductive plutonium stripping from an organic reprocessing solution into an aqueous, nitric solution by use of an electrolytic current, in which the aqueous solution is free of agents for the stabilization of the reduced va...
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JPS60173460A |
PURPOSE: To enable measurement of an acid concn. with good accuracy by providing zirconia film type hydrogen ion densitometers to a valency adjusting device and separating device of an apparatus which adjusts the valency of the specific ...
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JPS6038326B2 |
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JPS6035291B2 |
Method for separating plutonium ions from an aqueous solution containing sulfuric acid. The method comprises introducing into the aqueous solution 0.1 to 1.5 moles of nitrate ions per liter of aqueous solution. To the aqueous solution co...
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JPS6035286B2 |
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JPS6034502B2 |
A process for reducing plutonium is provided in which hydrazine is added as a reducing agent to a nitric acid solution of tetravalent plutonium in the presence of active carbon catalyst to thereby reduce tetravalent plutonium into trival...
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JPS6034499B2 |
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JPS60150830A |
PURPOSE: To improve adsorptive capacity and stability of an adsorbent by immersing a base material comprising cordierlite in an alkaline liquid previously and allowing titanic acid to deposit in the cordierlite after drying the immersed ...
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JPS6028533B2 |
PURPOSE:To produce an adsorbent having selectivity and high adsorbing power to heavy metals dissolved in water, esp. U by diazotizing a polyaminostyrene copolymer and coupling the diazotized copolymer with specified catechol derivatives.
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JPS6028534B2 |
PURPOSE:Preparation of a heavy metal ion adsorbent with high selectivity and adsorbability to uranium by polycondensation of a catechol derivative and formaldehyde.
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JPS609857B2 |
PURPOSE:To produce an adsorbent having selective adsorbing power to heavy metal ions by diazotizing a polyaminostyrene copolymer and coupling the diazotized copolymer with specified benzoic acid amide derivatives.
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JPS606289B2 |
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JPS604134B2 |
The continuous process comprises contacting the soln. with a homogeneous organic phase comprising a di-(alkylphenyl) phosphoric acid substantially free of mono(alkylphenyl) phosphoric acid and an organic solvent selected from aliphatic a...
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JPS603083B2 |
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JPS603081B2 |
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JPS603082B2 |
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JPS603084B2 |
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JPS6011230A |
PURPOSE: To recover efficiency uranium from an aqueous soln. contg. uranium such as sea water by adsorbing uranium on a polyion complex having carboxyl groups and amino groups and/or imino groups. CONSTITUTION: A polymerizable unsatd. ca...
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JPS6011231A |
PURPOSE: To recover uranium at a high rate of adsorption by bringing a soln. contg. uranium into contact with a specified chelate resin having a large adsorption capacity. CONSTITUTION: A polymer having groups reactive with amine such as...
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JPS6011224A |
PURPOSE: To recover efficiency heavy metals from a soln. by adsorption in a state which is independent of coexisting ions by bringing a chelate resin having functional groups having a specified structure in the molecule into contact with...
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JPS5953098B2 |
A method and apparatus is provided for removing contaminants or for receiving valuable minerals by ion exchange treatment of a feed liquid, e.g. waste water or phosphoric acid. The resin bed is a moving bed which is circulated stepwise f...
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JPS59223235A |
PURPOSE: To recover uranium in a short time with always small amt. of an adsorbent without deterioration of the adsorbent in a soln. contg. an oxidative chemical by bringing a specific chelate resin into contact with an uranium- contg. s...
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JPS5950605B2 |
PURPOSE:To concentrate uranium from a dilute uranium solution, and to recover the acid or alkali contained in the solution, with a simple procedure, in high efficiency, by filtering the solution under pressure with an organic polyelectro...
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JPS5948941B2 |
PURPOSE:To trap uranium from a diluted uranium solution as a high concentration uranium solution by using a fibrous ion exchange material having tetraammonium radical or pyridyl radical. CONSTITUTION:A diluted tranium solution is brought...
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JPS5946252B2 |
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JPS59166196U |
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JPS59190205A |
Heavy metals, particularly cadmium, are removed from very acid and hot monocalcium phosphate digestion liquors by adding an aromatic or heterocyclic dithiocarbamate, preferably in the form of a solid alkaline earth metal salt, and separa...
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JPS59182231A |
PURPOSE: To separate and recover uranium in the preparation of phosphate from phosphate rock, economically, in high recovery, by the co-precipitation process using an aluminum salt as a co-precipitation agent. CONSTITUTION: A properly pr...
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JPS5940490B2 |
A process for chemical enrichment of uranium with respect to a lighter one of its isotopes. The process consists in contacting uranium of valence state III and uranium of valence state IV, or a compound of uranium of valence state III an...
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JPS5939163B2 |
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JPS5939161B2 |
A countercurrent extraction column for a liquid-liquid extraction of two phases which are insoluble in each other with simultaneous electrolysis. The column comprises an outer tube, an inner tube within the outer tube, with the inner tub...
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JPS5933526B2 |
In preparing wet process phosphoric acid by decomposing a phosphate rock containing uranium with sulfuric acid and phosphoric acid on condition that hemihydrate gypsum is formed in an acid solution either at the stage of decomposing the ...
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JPS5933416B2 |
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