Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1997-10-31
1999-11-23
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210682, 210688, B01D 1504
Patent
active
059894342
ABSTRACT:
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.
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Lundquist Susan H.
White Lloyd R.
3M Innovative Properties Company
Cintins Ivars
Griswold Gary L.
Sherman Lorraine R.
Sprague Robert W.
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