Boron-removing agent and boron removal method utilizing xerogel

Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...

Reexamination Certificate

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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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International Search Report for PCT/JP2008/051178 dated May 1, 2008.

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