Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2005-01-18
2005-01-18
Barry, Chester T. (Department: 1724)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S688000, C210S912000, C210S914000, C210S913000
Reexamination Certificate
active
06843922
ABSTRACT:
A bead is provided which comprises or consists essentially of activated carbon immobilized by crosslinked poly(carboxylic acid) binder, sodium silicate binder, or polyamine binder. The bead is effective to remove metal and other ionic contaminants from dilute aqueous solutions. A method of making metal-ion sorbing beads is provided, comprising combining activated carbon, and binder solution (preferably in a pin mixer where it is whipped), forming wet beads, and heating and drying the beads. The binder solution is preferably poly(acrylic acid) and glycerol dissolved in water and the wet beads formed from such binder solution are preferably heated and crosslinked in a convection oven.
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Bennett Karen L.
Foster Scott A.
Summers, Jr. Bobby L.
Barry Chester T.
Ricura Technologies, LLC
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