Process for removing boron from brines
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United States of America Patent
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Aug 17, 1999
Grant Date -
N/A
app pub date -
Feb 20, 1997
filing date -
Feb 20, 1996
priority date (Note) -
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Abstract
Boron is effectively removed from brine, including lithium-containing brines, by acidifying the brine to a pH of 0.1 to 6.0 and then contacting the brine with an extraction medium comprising at least a diol having 6 to 20 carbon atoms in an aromatic solvent. The extraction medium may also contain high aliphatic alcohols and/or a phase modifier. The boron can be stripped from the boron rich extractant medium by a re-extraction stage utilizing an aqueous alkaline solution.
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