Selective fluoride and ammonia removal by chromatographic...

Details Selective fluoride and ammonia removal by chromatographic... Selective fluoride and ammonia removal by chromatographic...

2006-02-14

2006-02-14

Therkorn, Ernest G. (Department: 1723)

Liquid purification or separation

Processes

Chromatography

C210S682000, C423S483000, C423S488000

Reexamination Certificate

active

06998054

ABSTRACT:
A process for fluoride removal from wastewater streams produced during industrial operation for further industrial use or to comply with environmental regulations. The process segregates the removal of fluoride and fluorosilicate ions, from the totality of ions in the waste water stream, thus improving treatment efficiency and reducing costs. Ion-exchange chromatography is used to remove the fluoride and fluorosilicate ions by passing the wastewater stream through one or more columns that contain a charged resin which selectively binds cations/anions in the stream. The fluoride ions are washed from the column and then collected for removal or use in other processes.

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