Leaching gold without cyanide

Creasey ore leaching method

Creasey ore leaching method

United States Patent 7,964,015 issued to David Creasey teaches a method for leaching gold that does not rely on cyanide. The cyanide free leaching solution is made up of water, an alkali metal salt, and a strong acid. The patent claims that extraction of metals like gold, silver, and platinum from ore can be above 90%.

United States Patent 7,964,015 issued to David Creasey teaches a method for leaching gold that does not rely on cyanide. The cyanide free leaching solution is made up of water an alkali metal salt and a strong acid. The patent claims that extraction of metals like gold silver and platinum from ore can be above 90%.