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Adsorbent for metal ions and method of making and using

United States Patent

5,935,380
August 10, 1999
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
A method comprises the step of spray-drying a solution or slurry comprising (alkali metal or ammonium) (metal) hexacyanoferrate particles in a liquid, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size in the range of 1 to 500 micrometers, said particles being active towards Cs ions. The particles, which can be of a single salt or a combination of salts, can be used free flowing, in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove Cs ions from aqueous solutions.
White; Lloyd R. (Minneapolis, MN), Lundquist; Susan H. (White Bear Township, MN)
3M Innovative Properties Company (St. Paul, MI)
08/ 918,113
August 27, 1997
The invention was made with Government support under Subcontract 203690-A-F1, with Battelle Memorial Institute, Pacific Northwest Laboratories, based on a Contract DE-AC06-76RLO-1830 awarded by the Department of Energy, and under Contract DE-AR21-96MC 33089, awarded by The Department of Energy. The Government has certain rights in the invention.