Selective removal of nitrate ions from salt solutions
AssigneeRohm and Haas Company
InventorMarico G. Pirotta
Life of this patent
Estimating the term…
Abstract
A process is provided for selectively removing nitrate ions from solutions containing one or more additional ions, especially at high concentrations, by contacting the solution with amine-group-containing material under conditions of high kinetics. The process is particularly suitable for stripping nitrate from solutions which have been used to regenerate anion exchange resins loaded with nitrate ions.
Claims13
A process for selectively removing nitrate ions from an aqueous solution containing one or more dissolved salts, including at least about 1% by weight of a chloride salt, based on the total weight of the solution, which comprises contacting the aqueous solution, under conditions of high kinetics, with a water-insoluble, hydrophobic-solvent-soluble, amine-group-containing material, and subsequently separating the aqueous solution from the amine-group-containing material.
Dependencies are inferred from the claim text.