METHOD AND APPARATUS FOR REMOVING HYDROGEN PEROXIDE

WIPO Patent Application WO/2007/081054

A1

A method of removing hydrogen peroxide from water, characterized by bringing hydrogen peroxide-containing raw water into contact with a hydrogen peroxide decomposition catalyst which comprises a support and, deposited thereon, nanocolloidal particles of a platinum-group metal having an average particle diameter of 1-50 nm. Also provided is an apparatus for removing hydrogen peroxide, characterized by comprising: a hydrogen peroxide decomposer packed with a catalyst which comprises a support and, deposited thereon, nanocolloidal particles of a platinum-group metal having an average particle diameter of 1-50 nm; a water supply means for supplying hydrogen peroxide-containing raw water to the decomposer; and a drainage means for discharging from the decomposer the water which has been contacted with the catalyst. By the method and apparatus, hydrogen peroxide contained in raw water can be rapidly removed without fail. They are suitable for removing hydrogen peroxide from ultrapure water in an apparatus for ultrapure water production which is used especially in an industry where electronic materials such as semiconductors and liquid crystals are handled.

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KOBAYASHI HIDEKI (JP)

PCT/JP2007/050642

July 19, 2007

January 11, 2007

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KURITA WATER IND LTD (JP)
KOBAYASHI HIDEKI (JP)

C02F1/58; B01D19/00; B01D61/00; B01J31/08; B01J35/02; C02F1/20

WO2005023467A1

2005-03-17

JPH0824897A	1996-01-30
JP2005199267A	2005-07-28
JPH06254549A	1994-09-13
JP2000015272A	2000-01-18

UCHIYAMA, Mitsuru (4-1 Kandasudacho 1-chom, Chiyoda-ku Tokyo 41, JP)

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