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kolkata aqua regia gold refining plant set up
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kolkata aqua regia gold refining plant set up

TheGold Refining ProcessbyAqua Regiawas introduced at thePretoria Mintafter theMillerprocess had been tried and abandoned owing to the alleged difficulty of treating thegold bullionextracted by thecyanideprocess. In theaqua regiaprocess thegoldis dissolved and precipitated.

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