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how to recover gold from aqua regia

Oct 16 2019 Dear SIr or Madam I am trying to recover gold from ore by aqua I crushed the ore and poured the ore powder to a plastic container HCL until to cover the powder it to react with ore HNO3 again and wait for 2 days to finish the reaction it and use some NaOH for remove HNO3 SMB and change the colour to black for precipitation of gold

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