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Method for removing metal ions from solution with titanate sorbents

United States Patent

5,989,434
November 23, 1999
View the Complete Patent at the US Patent & Trademark Office
A method for removing metal ions from solution comprises the steps of providing titanate particles by spray-drying a solution or slurry comprising sorbent titanates having a particle size up to 20 micrometers, optionally in the presence of polymer free of cellulose functionality as binder, said sorbent being active towards heavy metals from Periodic Table (CAS version) Groups IA, IIA, IB, IIB, IIIB, and VIII, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size distribution in the range of 1 to 500 micrometers. The particles 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 metal ions from aqueous or organic liquid.
Lundquist; Susan H. (White Bear Township, MN), White; Lloyd R. (Minneapolis, MN)
3M Innovative Properties Company (St. Paul, MN)
08/ 960,528
October 31, 1997
The invention was made with Government support under Contract AR21-96MC-33089 awarded by the Department of Energy. The Government has certain rights in the invention.