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New Gold Extraction Technique Developed
28.07.2009 18:23
New Gold Extraction Technique Developed

Russian scientists suggest a new technology for extracting gold and silver from complex solutions.
      
      Chemists finally found a less toxic alternative for cyanide, a reagent, widely used in gold extraction from ores and recyclable materials.
      
      New reagent, thiocyanate, works almost the same way as cyanide it forms complexes with gold or silver. These complexes can be isolated via ion-exchange resins they replace chlorine ions in an ion-exchange column. Then metal complexes are eluted from the column, and desired metals are extracted by means of electrolysis, for instance.
      
      Source: Science & Technologies


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