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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.
In March 2017, Juan P. Granda a former employee of NTR Metals, Miami was charged with buying gold from illegal mines in Peru. [1] In January 2018; Samer H. Barrage, Renato J. Rodriguez, and Juan P. Granda; three former employees of the now-defunct Florida-based NTR Metals Miami, were jailed for six years after they pleaded guilty to money ...
Coastal produced and marketed petroleum, natural gas, electricity, and coal.It also sold gasoline at Coastal-branded gas stations. By 1999, Coastal Refining and Marketing operated 962 gas stations in 33 states and was supplied by four refineries, including a 150,000 bbl per day refinery in Corpus Christi, Texas, a 180,000 bbl per day refinery in Eagle Point, New Jersey, a 250,000 barrel per ...
The refinery further in the ensuing decades to becomes Beaumont's largest employer and eventually Mobil's largest refinery by 1980. [8] In 1999, Exxon and Mobil merged to form the largest oil company in the world and the Beaumont Refinery became one of the 5 largest refineries in the combined company's portfolio. [9]
It purchased the small petroleum companies Panhandle Oil Co. in 1956 and the American Liberty Co. of Dallas in 1957, in order to begin actual operations In June 2000, Fina Oil & Chemical Co. was renamed Atofina Petrochemicals Inc. and the headquarters moved to Houston Texas. [1] In 1963, the company acquired Cogsden Petroleum Corp.
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
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Urban mining is the process of recovering these rare metals through mechanical and chemical treatments. In 1997, recycled gold accounted for approximately 20% of the 2700 tons of gold supplied to the market. [5]