Gold extraction the purity of gold. The parting of gold from silver has been done since ancient times starting in Lydia in the 6th century BC. Various techniques have been practised; salt cementation from ancient times, parting using distilled mineral acids from medieval times, and in modern times using chlorination using the Miller process and electrolysis using the Wohlwill process. Gold extraction Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved
Commodity chain the same business. A number of commentators have remarked that in the Internet age commodity chains are becoming increasingly more transparent. The Wikichains.com project has adopted the same wiki technology used by Wikipedia in order to help make commodity chains more transparent. "They are a network of labour and production processes whose end result is a finished commodity". William Jones Esq. A commodity chain demonstrates that each link of an extended chain of production and consumption links between resource producers and suppliers, various manufacturers, traders and shippers, wholesalers, and retailers. Rather than a linear chain, a circuit-board is a better