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Title:
METHOD FOR PREVENTING ION EXCHANGE RESIN FROM BEING CONTAMINATED WITH BORON
Document Type and Number:
Japanese Patent JP2014121709
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for regenerating an ion exchange resin to be used for stably preparing ultrapure water having the boron concentration equal to or lower than 1 ng/L, and to provide an apparatus for preparing ultrapure water.SOLUTION: The method for regenerating the ion exchange resin comprises the steps of: treating a regenerating agent by using a boron removing means to remove boron therefrom; and bringing the ion exchange resin into contact with the boron-removed regenerating agent. The apparatus for preparing ultrapure water has: a regenerable ion exchange unit; a regenerating agent supply line for supplying the regenerating agent to the regenerable ion exchange unit; and the boron removing means to be disposed on the regenerating agent supply line.

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Inventors:
FUKUI NAGAO
HOTTA HITOSHI
IWASAKI KUNIHIRO
ODA NOBUHIRO
Application Number:
JP2014071318A
Publication Date:
July 03, 2014
Filing Date:
March 31, 2014
Export Citation:
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Assignee:
KURITA WATER IND LTD
International Classes:
B01J49/00; C02F1/42
Domestic Patent References:
JPH0150476B21989-10-30
JP2004000919A2004-01-08
JP2009112945A2009-05-28
JP2010234339A2010-10-21
JP2008031004A2008-02-14
JP2001017866A2001-01-23
JP2009240891A2009-10-22
JP2000051845A2000-02-22
JPH0978276A1997-03-25
JP2003315496A2003-11-06
JP2007117781A2007-05-17
Foreign References:
US20060021944A12006-02-02
WO2009060827A12009-05-14
Attorney, Agent or Firm:
Tsuyoshi Shigeno



 
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