Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2003-04-30
2008-12-02
Savage, Matthew O (Department: 1797)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S673000, C210S688000, C210S722000, C210S763000, C210S792000, C210S912000
Reexamination Certificate
active
07459086
ABSTRACT:
A method for treating water to produce potable water is described herein. The inventive method enables the efficient removal of iron, manganese, and arsenic without the addition of powerful oxidants and without requiring a complex procedure for preparing the filtering material. The described method treats the water by passing the water through at least one bed of filter material, where the filter material comprises an association of manganese dioxide grains and at least one iron-based divided material in the hydroxide, oxide, or metallic state. The association may comprise a mixture of the iron-based divided material and the manganese dioxide grains. Alternatively, the association may comprise a superposition of layers of the iron-based divided material and the manganese dioxide grains.
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Coats & Bennett P.L.L.C.
OTV SA S.A.
Savage Matthew O
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