Gold parting in 1860's Australia. It is able to refine gold up to 99.5% purity. The process involves blowing a stream of chlorine gas over and through a crucible filled with molten impure gold. Impurities in the gold form chlorides before the gold does and these insoluble salts are removed from the melt by skimming the surface. Invented by Emil Wohlwill in 1874, this produces the highest purity gold (99.999%). It is an electrolytic process using pure gold for the cathode (or titanium as a starter cathode) and chloroauric acid (gold chloride-hydrochloric acid) as the electrolyte; this is made by dissolving gold
Sustainable Commodity Initiative Sustainable Commodity Initiative The Sustainable Commodity Initiative (SCI) is a joint initiative launched by the International Institute for Sustainable Development (IISD) and the United Nations Conference on Trade and Development (UNCTAD) in 2003. The SCI works closely with the international community to discover ways to ensure that sustainable practices are adopted into commodity production and trade that enhance social, environmental and economic welfare on a global scale. The SCI was formed to facilitate the development of sustainable commodity production and trade sectors. The initiative works collaboratively with producers and producer organizations, voluntary sustainability initiatives (VSI's), the private sector, government institutions