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In 1956, the Pacific Coast Borax Company merged with United States Potash Corporation to form U.S. Borax, which itself was acquired by Rio Tinto Minerals (Rio Tinto Group) in 1967. As a wholly owned subsidiary , the company now is called Rio Tinto Borax and continues to supply nearly half the world's borates.
Borax (also referred to as sodium borate, tincal (/ ˈ t ɪ ŋ k əl /) and tincar (/ ˈ t ɪ ŋ k ər /)) is a salt (ionic compound), a hydrated or anhydrous borate of sodium, with the chemical formula Na 2 H 20 B 4 O 17.
The History of Lake County 1881 puts production at 12,341 flasks in the two-years 1874–1876. [13] Walter W. Bradley, state mineralogist, estimated total output to 1918 at 92,400 flasks. The mine was only sporadically worked after 1883, so the majority of the output can be attributed to the Parrott era.
The borax deposit here was discovered in 1913, by John K. Suckow, [4] who when drilling for water found a deposit of what he believed to be gypsum. Further testing revealed it was the colemanite form of borax. Francis Marion "Borax" Smith bought the claim for his Pacific Coast Borax Company. [5] [6] Mining at the site by shafts began in the 1920s.
Borax (Na 2 B 4 O 5 (OH) 4 · 8 H 2 O [2]) is a borate mineral found in evaporite deposits of alkaline lacustrine environments and as a surface efflorescence in arid regions. It is the chief mineral mined from the deposits at Boron, California and nearby locations, and is the chief source of commercial borax .
Borateem Bleach, Borateem Plus bleach substitute and 20 Mule Team Borax were all once manufactured by United States Borax & Chemical Corporation (n.k.a. US Borax, Inc.). Borateem products originally contained over 98% borax. Borateem, now manufactured by Dial Corporation, is a chlorine-free, color safe bleach powder but it has no borax content.
The three most important minerals from a worldwide commercial standpoint based on abundance are tincal (also known as borax), ulexite, and colemanite (Ekmekyaper et al., 2008). [22] High concentrations of economically significant boron minerals generally occur in arid areas that have a history of volcanism.
After discovery of Borax deposits here by Aaron and Rosie Winters in 1881, business associates William Tell Coleman and Francis Marion Smith subsequently obtained claims to these deposits, opening the way for "large-scale" borax mining in Death Valley. [3] Coleman constructed Harmony Borax Works and production of borax started in late 1883. [4]