Copper, iron, and nitrogen treated sorbent and method for making same
AssigneeCalgon Carbon Corporation
InventorsJason P. Mazzoccoli, Ryan W. Walker, Walter G. Tramposch
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Abstract
Carbonaceous material that is activated to form precursor activated carbon is further enhanced by doping with copper, iron, and nitrogen and calcining. The carbonaceous material includes those obtained from coal, wood, or coconut shells. Methods of doping the activated carbon are described. The described treatment processes result in a sorbent material that has excellent performance in removing chloramine and similar compounds from fluids such as water that is intended for drinking.
Claims23
A sorbent material formed from a carbonaceous material that is activated to form a precursor activated carbon, the sorbent material comprising:
- about 4 wt. % to about 20 wt. % nitrogen as measured on a precursor activated carbon basis;
- about 0.1 wt. % to about 1 wt. % iron as measured on a precursor activated carbon basis;
- and
- about 0.1 wt. % to about 1 wt. % copper as measured on a precursor activated carbon basis;
- wherein the weight ratio of iron and copper is about 50:50;
- wherein the sorbent material has a chloramine destruction number (CDN) of about 5 to about 75, and
- wherein the sorbent material has a peroxide number of less than about 20 minutes.
Dependencies are inferred from the claim text.