Method of converting brines to useful products
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United States of America Patent
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-
Jul 5, 1988
Grant Date -
N/A
app pub date -
Jan 30, 1987
filing date -
Jan 30, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for recovering useful animal feed supplements and a purefied brine from saline waters, such as oil and gas field brine wastes, involving the steps of adding an oxidizing agent to the brine to convert the divalent ferrous ions in the brine to ferric ions, then adding phosphoric acid in an amount approaching the stoicheometric equivalent of the divalent calcium ion the brine, then raising the pH of the brine to between 9 and 10 utilizing a material selected from the group consisting of sodium hydroxide or a mixture of sodium hydroxide and sodium carbonate followed by filtration to extract the feed supplement and thereafter adding a sufficient amount of hydrochloric acid to bring the pH to 7 and then crystallizing the sodium chloride from the resultant purefied brine solution.
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