Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2008-01-28
2011-12-06
Nguyen, Nam (Department: 1778)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S668000, C502S401000, C502S402000
Reexamination Certificate
active
08070950
ABSTRACT:
Disclosed is a boron removal method which can remove boron from boron-containing water satisfactorily by using a small amount of a chemical agent, and which generates small amount of precipitate. Also disclosed is a boron-removing agent which is easy to handle and has excellent boron-adsorption ability. A xerogel of an organic polymeric compound having a cis-type diol structure and a water-soluble salt of an alkaline earth metal are added to a boron-containing water under alkaline conditions.
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Hossaini Nader
Knobbe Martens Olson & Bear LLP
Kowa Company Ltd.
Nguyen Nam
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