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In gold mining, KCN forms the water-soluble salt potassium gold cyanide (or gold potassium cyanide) and potassium hydroxide from gold metal in the presence of oxygen (usually from the surrounding air) and water: 4 Au + 8 KCN + O 2 + 2 H 2 O → 4 K[Au(CN) 2] + 4 KOH. A similar process uses NaCN to produce sodium gold cyanide (NaAu(CN 2)).
Potassium dicyanoaurate (or potassium gold cyanide) is an inorganic compound with formula K[Au 2]. It is a colorless to white solid that is soluble in water and slightly soluble in alcohol . The salt itself is often not isolated, but solutions of the dicyanoaurate ion ( [Au(CN) 2 ] − ) are generated on a large scale in the extraction of gold ...
A canister of Comet cleanser. Comet is an American brand of scouring powders and other household cleaning products manufactured by KIK Custom Products Inc. The brand was introduced in 1956 by Procter & Gamble (P&G) and sold to Prestige Brands in 2001. [1]
Fairbank's Gold Dust washing products was a line of all-purpose cleaning agents researched and developed by the N. K. Fairbank Manufacturing Company. First introduced to the American consumer in 1889, Gold Dust Washing Powder became a success due in large part to its low selling price and bright, eye-catching packaging.
John Stewart MacArthur developed the cyanide process for gold extraction in 1887. The expansion of gold mining in the Rand of South Africa began to slow down in the 1880s, as the new deposits found tended to contain pyritic ore. The gold could not be extracted from this compound with any of the then available chemical processes or technologies. [5]
A 1997 review (Suarez-Almazor ME, et al) [6] reports that treatment with intramuscular gold (parenteral gold) reduces disease activity and joint inflammation. Gold-containing drugs taken by mouth are less effective than by injection. Three to six months are often required before gold treatment noticeably improves symptoms.
KAg(CN) 2 is significant adventitious product of gold mining using cyanide as an extractant. [1] It can be used in silver plating, as a bactericide, and in the manufacture of antiseptics. [2] It forms a variety of coordination polymers, a property that exploits the bridging tendency of the cyanide ligand. [3]
Gold(I) cyanide is the inorganic compound with the chemical formula AuCN. It is the binary cyanide of gold (I). It is an odourless, tasteless yellow solid. [ 4 ]