Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1998-06-18
2000-05-09
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210665, 210676, 210677, 210683, C02F 142, C02F 502
Patent
active
06059974&
ABSTRACT:
An improved water softening process is provided which also reduces anion content. A first stream of water is passed through an anion-exchange unit to remove undesirable anions and raise the pH. The first stream of water is then provided to reactor/clarifier water softening equipment, where it acts as a source of hydroxyl ions. Preferably a second stream of water which did not pass through an anion-exchange unit is also provided to the water softening equipment. The streams of water are combined and processed through the softening equipment, where hardness ions are precipitated out, yielding softened water with reduced anion content. The anion-exchange system utilized preferably has a counter-current continuous resin train and a counter-current continuous resin regeneration unit.
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Applied Specialties, Inc.
Cintins Ivars
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