Method of removing nitrate ion from a solution containing nitrat

Details Method of removing nitrate ion from a solution containing nitrat Method of removing nitrate ion from a solution containing nitrat

1992-02-28

1993-02-23

Bascomb, Jr., Wilbur

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210683, 210903, B01D 1504

Patent

active

051887371

ABSTRACT:
A solution containing nitrate ion and other anions is contacted with a bifunctional styrene-divinylbenzene three-dimensional copolymer for selectively removing the nitrate ion. The copolymer contains phosphonate and amino groups of the following formulas: ##STR1## wherein R.sup.1 and R.sup.2 stand, independently from each other, for a hydrocarbyl group, and ##STR2## wherein R.sup.3 and R.sup.4 stand, independently from each other, for hydrogen or an alkyl group with the proviso that R.sup.3 and R.sup.4 do not represent hydrogen at the same time.

REFERENCES:
patent: 3775088 (1973-11-01), Higgins
patent: 4134861 (1979-01-01), Roubinek
patent: 4267057 (1981-05-01), Hager et al.
patent: 4479877 (1984-10-01), Guter
patent: 4872989 (1989-10-01), Pirotta
patent: 4944878 (1990-07-01), Lockridge et al.
patent: 5062957 (1991-11-01), Berreby
patent: 5084185 (1992-01-01), Solt et al.

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