Method for producing ultrafine dispersion water of noble metal ultrafine particles

Abstract

Efficiently produce micro-dispersion water of super-fine noble metal particles having a desired concentration by using a very safe, compact production apparatus comprising a power supply for high-voltage/current discharge, a high-voltage discharge generator equipped with a noble metal electrode and its counter electrode, a water tank, a water inlet to the water tank, and an outlet for micro-dispersion water of super-fine noble metal particles, by causing plasma discharge in water between the noble metal electrode and its counter electrode and then causing the generated noble metal ion vapor to contact, and micro-disperse in, water. The obtained water can be effectively used as drinking water.

1 . A method for producing micro-dispersion water of super-fine noble metal particles comprising: 
 causing plasma discharge in water between an electrode made of noble metal and its counter electrode equipped on a high-voltage discharge generator to generate noble metal ion vapor; and    causing the generated noble metal ion vapor to contact, and micro-disperse in, water, thereby producing micro-dispersion water of super-fine noble metal particles.    
     
     
         2 . An apparatus for producing micro-dispersion water of super-fine noble metal particles, comprising a power supply for high-voltage/current discharge, a high-voltage discharge generator equipped with a noble metal electrode and its counter electrode, a water tank, a water inlet to the water tank, an outlet for produced water, and a discharge pump.  
     
     
         3 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 2 , wherein the noble metal electrode has a bar or wire shape and a device to successively feed the electrode is provided.  
     
     
         4 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 3 , further comprising a device for vibrating or sliding in the water tank the noble metal electrode and its counter electrode equipped on the high-voltage discharge generator.  
     
     
         5 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 3 , further comprising a filter system for removing generated coarse noble metal particles.  
     
     
         6 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 3 , wherein the residue of fine noble metal particles left on the filter system is backwashed in the filter system and recovered.  
     
     
         7 . Micro-dispersion water of super-fine noble metal particles obtained by causing plasma discharge in water between an electrode made of noble metal and its counter electrode equipped on a high-voltage discharge generator to generate noble metal ion vapor and then causing the generated noble metal ion vapor to contact, and micro-disperse in, water.  
     
     
         8 . Micro-dispersion water as described in  claim 7 , wherein the noble metal is gold.  
     
     
         9 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 4 , further comprising a filter system for removing generated coarse noble metal particles.  
     
     
         10 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 4 , wherein the residue of fine noble metal particles left on the filter system is backwashed in the filter system and recovered.  
     
     
         11 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 5 , wherein the residue of fine noble metal particles left on the filter system is backwashed in the filter system and recovered.  
     
     
         12 . An apparatus for producing micro-dispersion water of super-fine noble metal particles, comprising: 
 a high-voltage discharge generator equipped with a noble metal electrode and its counter electrode, said discharge generator generating plasma discharge in water between said noble metal electrode and its counter electrode;    a power supply for supplying high-voltage/current discharge to said noble metal electrode and its counter electrode;    a water tank for holding water, said noble metal electrode and its counter electrode being arranged into the water tank;    a water inlet for supplying water to said water tank, said water inlet being connected to said water tank;    an outlet connected to said water tank; and    a discharge pump for discharging produced water which contains super-fine noble metal particles from said outlet.    
     
     
         13 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 12 , further comprising a device for vibrating or sliding in the water tank the noble metal electrode and its counter electrode, said device being disposed between said power supply and said noble metal electrode.  
     
     
         14 . The apparatus for producing micro-dispersion water of super-fine noble metal particles as described in  claim 12 , further comprising a filter for removing generated coarse noble metal particles, said filter being connected to said discharge pump.