wohlwill process
1Wohlwill process — The Wohlwill process is an industrial scale chemical procedure used to refine gold to a high degree of purity (99.999%). The process was invented in 1874 by Emil Wohlwill. This electrochemical process involves casting a dore ingot of 95%+ gold to …
2wohlwill process — ˈvōlˌvil noun Usage: usually capitalized W Etymology: after Emil Wohlwill died 1912 German inventor : an electrolytic process for refining gold using a hydrochloric acid electrolyte …
3Emil Wohlwill — Hans Emil Wohlwill (November 24, 1835, Seesen February 2, 1912, Hamburg) was a German engineer of electrical chemistry. He invented the Wohlwill process in 1874. Literary works * Galilei und sein Kampf für die copernikanische Lehre , the 1st… …
4Miller process — The Miller process is an industrial scale chemical procedure used to refine gold to a high degree of purity (99.95%). It was invented by Francis Bowyer Miller. This chemical process involves blowing a stream of pure chlorine gas over and through… …
5Procédé Wohlwill — Le procédé Wohlwill est un procédé chimique industriel permettant la purification de l or au degré le plus élevé (99,999%). Le procédé a été inventé en 1878 à Hambourg par Emil Wohlwill[1]. Il permet de purifier l or à un degré plus élevé que le… …
6gold processing — Introduction preparation of the ore for use in various products. For thousands of years the word gold has connoted something of beauty or value. These images are derived from two properties of gold, its colour and its chemical stability.… …
7Gold — This article is about the metal. For the color, see Gold (color). For other uses, see Gold (disambiguation). platinum ← gold → mercury …
8silver processing — Introduction preparation of the ore for use in various products. Silver has long been valued for its white metallic lustre, its ability to be readily worked, and its resistance to the corrosive effects of moisture and oxygen. The… …
9Aqua regia — Freshly prepared aqua regia is colorless, but it turns orange within seconds. Here, fresh aqua regia has been added to these NMR tubes to remove all traces of organic material …
10Chloroauric acid — Other names …
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