Methods of removing inorganic fluoride from compositions containing fluorinated organic compounds
Assignee3M Innovative Properties Company
InventorPhanasouk Vorarath
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Abstract
Methods of treating a water sample containing both free fluoride and fluorinated organic compounds are described. The methods are effective at removing high amounts of the free fluoride while retaining high amounts of the fluorinated organic compounds. The methods include combining the water sample with a hexaalkyldisiloxane, a strong acid and a compatibilizing solvent; reacting the free fluoride with the disiloxane; and removing the fluorinated reaction product.
Claims12
A method of treating a water sample containing free fluoride and fluorinated organic compounds, the method comprising combining the water sample with a hexaalkyldisiloxane, a strong acid, and a compatibilizing solvent to form a single phase solution;
- reacting the free fluoride with the hexaalkyldisiloxane to form a flurorotrialkylsilane, and removing the flurorotrialkylsilane to form a purified composition.
The method according to any one of the preceding claims, wherein the purified composition comprises greater than 95% by weight of the fluorinated organic compounds contained in the water sample.
Dependencies are inferred from the claim text.