Methods for reducing boron concentration in high salinity liquid
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United States of America Patent
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Oct 28, 2008
Grant Date -
Apr 8, 2004
app pub date -
Jun 12, 2003
filing date -
Jun 13, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods of treating a high salinity liquid, such as seawater, containing boron are provided, including adjusting the pH of the liquid to about 8 to about 9.5, optionally adding a scale inhibitor to the liquid, passing the liquid through a reverse osmosis device, and recovering a permeate having a boron concentration less than about 2 ppm. One embodiment includes removing colloidal matter from the liquid using a membrane filtration system, such as ultrafiltration or microfiltration, prior to passing the liquid through the reverse osmosis device, and preferably prior to adjusting the pH of the liquid.
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