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In the first issue in 1938 of the Journal of the American College of Dentists, Dr. Murray, Gray, and Indium Corporation of America are acknowledged by Reginald V. Williams, A.C., of Williams Gold Refining Co. of Buffalo in his study "Use of Indium in Dental Alloys" for "their assistance in the preparation of pure indium, the special equipment ...
The Wohlwill process is an industrial-scale chemical procedure used to refine gold to the highest degree of purity (99.999%). [1] 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.
Pallion designs, manufactures, and distributes precious metal products and related services. It is the largest precious metal services group in Australasia. [1] [2] Pallion is the result of the merger in 2014 [3] [4] of the ABC Bullion and Palloys Group of companies founded in 1972 and 1951 respectively.
Craddock, P. T. 2000a Historical Survey of Gold Refining: 1 Surface Treatments and Refining Worldwide, and in Europe Prior to AD 1500. In A. Ramage and P. T Craddock (eds) King Croesus' Gold; Excavations at Sardis and the History of Gold Refining. London: British Museum Press, 27–53. ISBN 978-0-674-50370-0, 0-674-50370-8
The resulting gold is 99.5% pure, but of lower purity than gold produced by the other common refining method, the Wohlwill process, which produces gold of up to 99.999% purity. [1] [2] The Wohlwill process is commonly used for producing high-purity gold, such as in electronics work, where exacting standards of purity are required.
Oil company Phillips 66 announced Wednesday that it plans to shut down a Los Angeles-area refinery by the end of 2025, citing market concerns. The company said it will remain operating in the state.
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