Aqua Regia Process Gold Extraction from aqua regia
2020-5-1 · Aqua regia is a combination of HCL and HNO3. 3 parts of HCL and 1 part of HNO3 make aqua regia for gold dissolving. Let’s know about gold extraction from aqua regia. There are many procedures for gold precipitation from aqua regia. For example, we can use Sodium metabisulfite, oxalic acid, iron and some others. But I like SMB (sodium