Chemistry of inorganic compounds – Boron or compound thereof – Oxygen containing
Patent
1996-05-10
1997-10-14
Bos, Steven
Chemistry of inorganic compounds
Boron or compound thereof
Oxygen containing
423283, C01B 3512, C01B 3510
Patent
active
056769164
ABSTRACT:
A process for extracting boron from brines of natural or industrial salt mines which includes the steps of reacting borates contained in the brine with a solution of hydrochloric acid and forming boric acid, cooling the brine containing boric acid, separating the boric acid from the remainder of the brine to obtain impure boric acid and brine having a low boron content, washing the impure boric acid with distilled or demineralized water to obtain purified boric acid, and drying the purified boric acid. Boric acid crystals thus obtained are washed and recrystallized. The remaining boron in the low boron content brine can be removed by extraction in a paraffin solvent. The boron can then be re-extracted from the solvent and converted to boric acid for isolation and purification as above.
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Bos Steven
Sociedad Minera Salar de Atacama S.A.
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