Wohlwill process Wohlwill process The Wohlwill process is an industrial-scale chemical procedure used to refine gold to the highest degree of purity (99.999%). The process was invented in 1874 by Emil Wohlwill. This electrochemical process involves using a cast gold ingot, often called a Doré bar, of 95%+ gold to serve as an anode. Lower percentages of gold in the anode will interfere with the reaction, especially when the contaminating metal is silver or one of the platinum group elements. The cathode(s) for this reaction are small sheets of pure (24k) gold sheeting or stainless steel. Current is applied to the system,
Refine S2 Refine S2 The Refine S2 is a subcompact CUV produced by JAC Motors under the Refine sub-brand. It was positioned between the Refine S2 Mini and the Refine S3 compact CUV. The Refine S2 was launched on the 2015 Shanghai Auto Show in April 2015, and was later launched in the Chinese market in August 2015. Pricing of the Refine S2 was revealed at the market launch with prices ranging from 58,800 yuan to 75,800 yuan. The JAC iEV7S is essentially the electric version of the Refine S2. It costs 119,500 yuan after subsidies, and it is powered by an