WATER TREATMENT METHOD AND WATER TREATMENT FLOCCULANT

Title:

WATER TREATMENT METHOD AND WATER TREATMENT FLOCCULANT

Document Type and Number:

WIPO Patent Application WO/2011/018978

Kind Code:

A1

Abstract:

Provided is a water treatment method which uses a water treatment flocculant comprising a phenol resin-based alkali solution, and with which there is very little secondary pollution due to flocculation residue. The water treatment method involves adding the flocculant to the water to be treated and subjecting the product to membrane separation. The flocculant is formed from an alkali solution of a phenol resin having a melting point between 130ºC and 220ºC. The water treatment flocculant is obtained by adding an aldehyde to an alkali solution of a novolak phenol resin obtained by reacting a phenol and an aldehyde in the presence of an acid catalyst, and then performing a resol-type secondary reaction in the presence of an alkali catalyst.

Inventors:

OOI YASUHIRO (JP)
TADA KEIJIROU (JP)
ABE YUKIO (JP)
IIZUKA TAKESHI (JP)
KITANO SATOSHI (JP)

Application Number:

PCT/JP2010/063303

Publication Date:

February 17, 2011

Filing Date:

August 05, 2010

Export Citation:

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Assignee:

KURITA WATER IND LTD (JP)
GUN EI CHEMICAL INDUSTRY CO LTD (JP)
OOI YASUHIRO (JP)
TADA KEIJIROU (JP)
ABE YUKIO (JP)
IIZUKA TAKESHI (JP)
KITANO SATOSHI (JP)

International Classes:

B01D21/01; C02F1/44; C02F1/52; C02F1/56; C08G8/00; C08G8/04

Foreign References:

JPS51759A	1976-01-06
JPH02135257A	1990-05-24
JPH03146191A	1991-06-21
JPH06262184A	1994-09-20
JP2007007563A	2007-01-18
JP2001096279A	2001-04-10
JP2004113983A	2004-04-15
JP2010017688A	2010-01-28
JPH03146191A	1991-06-21
JPH06285476A	1994-10-11
JPH06287262A	1994-10-11
JP2009186348A	2009-08-20
JP2010081078A	2010-04-08

Other References: