Platinum Oxide Colloidal Solution, Manufacturing Method Therefor, Manufacture Apparatus Thereof, and Method of Injection Noble Metal of Boiling Water Nuclear Power Plant

Abstract

An aqueous solution of alkali hexahydroxo platinate is produced. As a alkali hexahydroxo platinate, sodium hexahydroxoplatinate or potassium hexahydroxoplatinate is used. The aqueous solution of alkali hexahydroxo platinate is passed through a hydrogen form cation exchange resin layer in a cation exchange resin tower. The aqueous solution of alkali hexahydroxo platinate makes contact with the hydrogen form cation exchange resin of the hydrogen form cation exchange resin layer, thus a suspension of hexahydroxo platinic is generated. If gamma rays are irradiated to the suspension, a platinum oxide colloidal solution in which colloidal particles including a platinum dioxide, a platinum monoxide, and a platinum hydroxide exist is generated. In a platinum oxide colloidal solution, the content of impurities is little and a noble metal compound is dispersed stably in water.

What is claimed is: 
     
         1 . A method of manufacturing a platinum oxide colloidal solution comprising an ion exchange process of substituting hydrogen ions for cations included in an aqueous solution of hexahydroxoplatinate salt and generating a suspension; and
 a colloid generation process of irradiating gamma rays to said suspension.   
     
     
         2 . The method of manufacturing a platinum oxide colloidal solution according to  claim 1 , wherein said aqueous solution comes into contact with a hydrogen form cation exchange resin in said ion exchange process. 
     
     
         3 . The method of manufacturing a platinum oxide colloidal solution according to  claim 1 , wherein said hexahydroxoplatinate salt is sodium hexahydroxoplatinate or potassium hexahydroxoplatinate. 
     
     
         4 . The method of manufacturing a platinum oxide colloidal solution according to  claim 1 , wherein said aqueous solution includes alcohol. 
     
     
         5 . The method of manufacturing a platinum oxide colloidal solution according to  claim 4 , wherein when the number of carbons configuring a molecule of said alcohol is n, a concentration of said alcohol is lower than 0.17/n (mM). 
     
     
         6 . The method of manufacturing a platinum oxide colloidal solution according to  claim 4 , wherein when the number of carbons configuring a molecule of said alcohol is n, a concentration of said alcohol is 0.03/n (mM) or lower. 
     
     
         7 . The method of manufacturing a platinum oxide colloidal solution according to  claim 1 , wherein an irradiation quantity of said gamma rays is 7 kGy or larger. 
     
     
         8 . A platinum oxide colloidal solution manufacturing apparatus comprising:
 a cation exchange resin filling unit for substituting hydrogen ions for cations included in an aqueous solution of hexahydroxoplatinate salt and generating a suspension;   a reaction vessel connected to said cation exchange resin filling unit and supplying said suspension from said cation exchange resin filling unit; and   a gamma ray generation apparatus facing to said reaction vessel and irradiating gamma rays to said suspension in said reaction vessel.   
     
     
         9 . The platinum oxide colloidal solution manufacturing apparatus according to  claim 8 , comprising:
 a pump for supplying a liquid to said cation exchange resin filling unit.   
     
     
         10 . A platinum oxide colloidal solution, wherein said solution is an aqueous solution including platinum oxide colloidal particles. 
     
     
         11 . The platinum oxide colloidal solution according to  claim 10 , wherein said colloidal particles include a platinum oxide and a platinum hydroxide having a platinum valence of 2 to 4. 
     
     
         12 . The platinum oxide colloidal solution according to  claim 10 , wherein said colloidal particles include a platinum dioxide of 90 atomic % or higher. 
     
     
         13 . The platinum oxide colloidal solution according to  claim 10 , wherein said aqueous solution includes alcohol, and
 Wherein when the number of carbons configuring a molecule of said alcohol is n, a concentration of said alcohol is lower than 0.17/n (mM).   
     
     
         14 . The platinum oxide colloidal solution according to  claim 10 , wherein said colloidal particles do not practically include an alkaline metal and an alkaline earth metal. 
     
     
         15 . The platinum oxide colloidal solution according to  claim 10 , wherein said colloidal particles are practically made up of only platinum, oxygen, and hydrogen. 
     
     
         16 . A method of injecting a noble metal of a boiling water nuclear power plant, comprising of steps:
 injecting a noble metal compound colloidal solution including colloidal particles including a noble metal oxide and a noble metal hydroxide, each surface of said colloidal particles being charged negatively at pH of 5.6 or higher, into a pipe connected to a reactor pressure vessel through an injection pipe connected to said pipe of said reactor pressure vessel; and   injecting said noble metal compound colloidal solution into cooling water in said reactor pressure vessel through said pipe connected to said reactor pressure vessel.   
     
     
         17 . The method of injecting a noble metal of a boiling water nuclear power plant according to  claim 16 , wherein colloidal particles including a platinum oxide and a platinum hydroxide are used as said colloidal particles. 
     
     
         18 . The method of injecting a noble metal of a boiling water nuclear power plant according to  claim 17 , wherein gamma rays are irradiated to a hexahydroxo platinate suspension generated by substituting hydrogen ions for cations included in a hexahydroxo platinate solution; and
 Wherein a platinum oxide colloidal solution generated by said irradiation of said gamma rays and including said colloidal particles including said platinum oxide and said platinum hydroxide is used as said noble metal compound colloidal solution.   
     
     
         19 . The method of injecting a noble metal of a boiling water nuclear power plant according to  claim 16 , wherein a particle diameter of said colloidal particles is within a range from 1 nm to 4.5 nm. 
     
     
         20 . The method of injecting a noble metal of a boiling water nuclear power plant according to  claim 16 , wherein said noble metal compound colloidal solution including said colloidal particles is mixed with a solution including zinc; and
 wherein said noble metal compound colloidal solution including said colloidal particles and zinc is injected into said pipe connected to said reactor pressure vessel.