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Matches 551 - 600 out of 1,209

Document Document Title
JPH0321344A
PURPOSE: To obtain an adsorbent extremely enhanced in uranium adsorbing capacity by using an uranium adsorbent wherein an imidoxim group is formed in relatively larger quantities as compared with an amidoxim group. CONSTITUTION: A polyme...  
JPH0317599A
PURPOSE: To regulate the relative flowing velocity or quantity of a purex solvent extracting process by measuring the density state of organic phase in an extraction column ad operating the process conditions in response to the change of...  
JPH03500337A  
JPH02283615A
PURPOSE: To remove Th from raffinate by passing the raffinate effluent produced from a stage for thickening U ores through a series of reactors contg. biomass and precipitating the hydroxide of the Th from an eluate obtainable by elution...  
JPH02283614A
PURPOSE: To separate and remove Th from raffinate effluent produced from a stage for thickening U ores by prewashing the raffinate effluent, then extracting the Th contained therein by a specific solvent, further reverse extracting the T...  
JPH0253372B2  
JPH0251850B2  
JPH0249761B2  
JPH0249255B2  
JPH02236236A
PURPOSE: To efficiently, cost effectively and safely recover metals from source materials by treating the source materials with HF, recovering Ta and Nb by extracting from the aq. phase, treating a solid phase with sulfuric acid and reco...  
JPH02234099A
PURPOSE: To reduce the number of refining cycles for U and Pu of irradiated fuel within the reprocessing facility by extracting U (VI) and Pu (IV) ions in an acid solution by using a mixture of N, N-dialkylamide. CONSTITUTION: A solution...  
JPH02225634A
PURPOSE: To deoxidize a refractory metal (high m.p. metal) by mixing the refractory metal of powdery Ti, etc., containing a little quantity of O2, a specific deoxidizer and deoxidizer carrier, heating in dried inactive gas atmosphere, de...  
JPH0239452B2  
JPH0230368B2  
JPH0227288B2  
JPH0227289B2  
JPH02129033A
PURPOSE: To obtain at low cost high-purity uranium using simple equipment by dissolving uranium ore or yellow cake in a mineral acid to prepare a U(VI)- contg. solution and then by reducing this solution with metallic zinc or metallic ir...  
JPH02118035A
PURPOSE: To safely and economically adsorb and recover uranium from uranium- contg. water by using a uranium adsorbent contg. amino acid fermentation bacteria belonging to brevibacterium or corynebacterium. CONSTITUTION: This uranium ads...  
JPH0216250B2  
JPH0214290B2  
JPH0212885B2  
JPH0277535A
PURPOSE: To selectively recover actinoid elements by bringing basidiomycetes into contact with a soln. contg. actinoid elements, and adsorbing actinoid elements. CONSTITUTION: Basidiomycetes are suspended in a soln. contg. actinoid eleme...  
JPH0273926A
PURPOSE: To completely remove the U, Th, etc., in a high melting point metal and to refine the metal by heating the metal contg. U, Th, etc., as impurities at high temp. in a graphite furnace while passing an inert, gas to vaporize and r...  
JPH0210208B2  
JPH0254732A
PURPOSE: To elute and recover Tc from activated carbon without causing a decrease in the adsorption capacity of the activated carbon and the nitration due to use of nitric acid by bringing a soln. contg. thiocyanate ion or iodine ion int...  
JPH0217902A
PURPOSE: To enhance a concentration of solute in a back-washing liquid by returning one portion of an extraction solvent liquid from an intermediate point between the upstream end and the downstream end of a back extraction part to forwa...  
JPH01502976A  
JPH01212727A
PURPOSE: To improve recovery efficiency of uranium absorbing material by hanging down plural absorbing floors as sloping downward into sea, supplying the uranium absorbing material from upper part and arranging means for recovering the a...  
JPH01208427A
PURPOSE: To prevent wear of wall face of a crucible and breakage of the crucible and to improve durability of the crucible by charging metal raw material for melting and high melting point metal constituting the crucible into the crucibl...  
JPH01203228A
PURPOSE: To enhance the reextraction effect without forming a harmful matter such as hydrazoic acid by bringing a Pu-contg. org. salt into contact with an aq. acidic soln. contg. uranous salt and a hydroxylamine salt. CONSTITUTION: An or...  
JP01165730A
PURPOSE: To solidify molten metallic uranium without causing scattering or corroding a capturing material by dropping the molten metallic uranium into a melt having a lower m.p. and a lower sp. gr. than metallic uranium. CONSTITUTION: A ...  
JP01147027A
PURPOSE: To recover metallic uranium having the shape of a thin slice executable of a treatment using nitric acid etc., in a vapor phase by dropping molten uranium onto the surface of a cooled rotating body, soldifying it into the shape ...  
JPH0128920B2  
JPH0125816B2  
JPH0125818B2  
JP01123198A
PURPOSE: To enable an effective capture of radioactive substances, by providing an absorber filled part which is composed of an oxygen/hydrogen absorber, a radioactive corrosion products and a radioactive fission products absorber as a r...  
JPH01108324A
PURPOSE: To efficiently adsorb and collect the uranium in the sea water at a low cost by packing uranium adsorbents into sheet-like fiber bag bodies having water permeability and flexibility and supporting the bag bodies in the sea water...  
JPH0162352U  
JPH0117737B2  
JPS6485987A
PURPOSE: To obtain the compd. which has excellent stability and is useful as a chelating agent and extracting agent by bringing sodium diester phosphite into reaction with tetramethyl diphosphonate, making the product acidic and acting a...  
JPS646199B2  
JPS6426195A
PURPOSE: To facilitate the treatment and disposition of high-level waste by magnetizing and separating fission product (FP) ions to a particulate state, then precipitating transuranium elements (TRU) and magnetizing and separating the pr...  
JPS6410657U  
JPS641535B2  
JPS6367678B2  
JPS6366372B2  
JPS63277240A
PURPOSE: To obtain a readily handleable uranium adsorbent, consisting of a polyethyleneimine having a specific calix[n]arene derivative residue in the side chain and having excellent affinity and selectivity for uranyl ions. CONSTITUTION...  
JPS63266028A
PURPOSE: To efficiently adsorb uranium in seawater on an adsorbent and to extract uranium by arranging plural hung pipes provided with many basket bodies having an opening for the uranium adsorbent to go in and out in seawater, and utili...  
JPS63252586A
PURPOSE: To enhance economical efficiency, by providing an uranium or lithium recovery apparatus to the seawater discharge channel from a condenser and creating an ocean farm at a seawater outflow part. CONSTITUTION: The low water temp. ...  
JPS6351964B2  

Matches 551 - 600 out of 1,209