Method of chelating heavy metal ions
OwnerElias T. Nasrallahinventor
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Abstract
Poly(2-vinyl pyridine-1-oxide), a nontoxic water-soluble polymer, is useful for chelating heavy metal ions, such as mercury and lead, found as a result of poisoning or environmental contamination. The polymer forms stable metal-chelate complexes and is effective over a wide range of pH values.
Claims4
The method of chelating a heavy metal ion which comprises mixing an aqueous solution containing said ion with an aqueous solution of water soluble poly(2-vinyl pyridine-1-oxide), the concentration of the poly(2-vinyl pyridine-1-oxide) in the latter aqueous solution being at least 0.03% by weight, to form a water soluble polymer-metal complex which is stable in an acid medium down to a pH of about 2.
Dependencies are inferred from the claim text.