Title:
WATER TREATMENT METHOD AND WATER TREATMENT AGENT
Document Type and Number:
Japanese Patent JP2019214037
Kind Code:
A
Abstract:
To provide a water treatment method capable of reducing water soluble COD components stably even when an amount of a water treatment agent is used excessively with respect to kinds and amounts of water soluble COD components involved in a water to be treated and variation of drainage volume.SOLUTION: The water treatment method includes a step of addition, to a water to be treated, of a water treatment agent (P1) including a copolymer (M) having a weight-average molecular weight of 500-1,000,000, prepared by polymerization of a monomer (m1) bearing a cationic functional group and a monomer (m2) not bearing a cationic functional group, and a water treatment agent (P2) including at least one salt (S) selected from a group consisting of a silicate, a phosphate and a borate.SELECTED DRAWING: Figure 2
Inventors:
YAMASHIRO TAKATSUGU
TAKEUCHI YOSHIKI
MATSUMOTO MAKOTO
SHIMIZU TOMOKAZU
TAKEUCHI YOSHIKI
MATSUMOTO MAKOTO
SHIMIZU TOMOKAZU
Application Number:
JP2019099366A
Publication Date:
December 19, 2019
Filing Date:
May 28, 2019
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD
International Classes:
C02F1/56; B01D21/01; C02F1/52; C02F11/148
Domestic Patent References:
| JP2008188544A | 2008-08-21 | |||
| JP2003520661A | 2003-07-08 | |||
| JP2003164900A | 2003-06-10 | |||
| JPS59160598A | 1984-09-11 | |||
| JP2013154287A | 2013-08-15 |