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US 4,789,475 AGranted
Water purification material, process therefor, and device for the removal of heavy metal toxins
AssigneeEnvironmental Concerns, Inc.
InventorsRichard A. Harte, David B. Wilson
Life of this patent
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Abstract
A filter bed material for the removal of heavy metal ions from water and process for the manufacture thereof. The bed material includes a charcoal bed having a chelating agent adsorbed thereto utilizing a polymer to aid in the adsorption of the chelating compound.
Claims10
A process for the manufacture of a filter bed material including the following steps:
- bathing a bed material in a solution of 0.01% to 1.5% polymer solution, said polymer solution containing a chelating agent;
- agitating said solution;
- removing said bed material from the solution;
- drying said bed material;
- treating said bed material with an acidic solution;
- removing said bed material from the acidic solution;
- and drying said bed material.
4 more elements
Dependencies are inferred from the claim text.