May 23, 2018· Though gold is valuable, the most common sources of gold are rarely pure. Whether it is freshly mined gold ore or a refined gold used in jewelry, contaminants and unwanted minerals are usually present. Nitric acid can be used to refine gold, but you must be careful during the process.
Sulphuric acid is produced using sulphur and water as raw materials via contact process, wet sulphuric acid process, lead chamber process etc. Estimated worldwide production of sulphuric acid is 160 million tonnes/year. The sulfur atom is bound to two oxygen atoms through double bonds and two hydroxyl groups (OH) through single bonds.