What are the requirements and conditions for reducing gold trichloride solution with sulfur dioxide?
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What are the requirements and conditions for reducing gold trichloride solution with sulfur dioxide? Urgent!
Reply to 1# hnjycgyl001: There’s nothing special about it. After leaching with aqua regia, the filtrate must be clean. At first, the temperature should be kept low; heat is released during reduction. Once the temperature stops rising and starts to drop slightly, continue to pass gas for a few minutes. Pay attention to the reaction rate when introducing gas, as this can easily lead to overflow. It may vary from place to place; it’s hard to say.
Start with a lower temperature; how low? Is it the end once the temperature drops a little?