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Rio Tinto Borax mine and plant, 2012 Rio Tinto Borax mine from ISS, 2013 Borax crystals, Boron Mine. Scale is one inch, ruled at one cm. The Rio Tinto Boron Mine (formerly the U.S. Borax Boron Mine) in Boron, California is California's largest open-pit mine and the largest borax mine in the world, producing nearly half the world's
Borax is also easily converted to boric acid and other borates, which have many applications. Its reaction with hydrochloric acid to form boric acid is: Na 2 B 4 O 7 ·10H 2 O + 2 HCl → 4 H 3 BO 3 + 2 NaCl + 5 H 2 O. Borax is sufficiently stable to find use as a primary standard for acid-base titrimetry. [17]: p.316
Boric acid is a weak acid, with pK a (the pH at which buffering is strongest because the free acid and borate ion are in equal concentrations) of 9.24 in pure water at 25 °C. But apparent p K a is substantially lower in swimming pool or ocean waters because of interactions with various other molecules in solution.
In 1988, just over 20 years after the acquisition of U.S. Borax by Rio Tinto Group, the Boraxo, Borateem and 20-Mule Team product lines were sold to Dial Corporation by U.S. Borax. [4] Dial is now an American consumer products unit of Henkel. [2]
Rio Tinto Group (NYSE: RIO) Q4 2024 Earnings Call Feb 19, 2025, 3:00 p.m. ET. Contents: Prepared Remarks. Questions and Answers. Call Participants. Prepared Remarks: Jakob Stausholm-- Chief ...
Rio Tinto Boron mine and plant, 2012 Boron (right center) and the Rio Tinto Borax mine from ISS, 2013. A large borax deposit was discovered in 1925, [25] and the mining town of Boron was established soon thereafter. This borax deposit is the world's largest borax mine. [23] It is owned by Rio Tinto Minerals (formerly U.S. Borax).
In 2012, it held a 47% share of global production of borate minerals, ahead of its main competitor, Rio Tinto Group, which held 23%. [2] In 2012, it was the forty-first largest industrial company in Turkey, with an annual revenue of $850 million. [3] [4]
The Rio Tinto Company Limited later built new facilities in the area, such as Fundición Mina (1879), Fundición Huerta Romana (1889) or Fundición Bessemer (1901), as well as Cementación Cerda and Cementación Planes to carry out the copper extraction works by wet process. [40]