Title:
SLUDGE DEHYDRATING AGENT AND ITS USE
Document Type and Number:
Japanese Patent JP3547114
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce sludge treatment cost by combining specified polymer flocculants.
SOLUTION: Polymer flocculants (A), (B) and (C) are combined. The polymer flocculant A contains 5-100 mol.% structural units of formula I and/or formula II (R1 and R2 are each H or methyl and X is an anion) and 0-30 mol.% structural units of formula III (B is COOH or CONHC4H8SO3H). The polymer flocculant B contains 10-100 mol.% repeating units of formula IV (A is O or NH, R1 is H or CH3, R2 is C3H6 or C3H6, R3 and R4 are each CH3 or C2H5, R5 is H, methyl, ethyl or benzly and X is a counter anion) and 0-30 mol.% repeating units of the formula III. The cationic polymer flocculant C contains ≥5 mol.% structural units of a dialkyldi(meth)allylammonium salt.
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Inventors:
Toru Miyajima
Application Number:
JP2252998A
Publication Date:
July 28, 2004
Filing Date:
January 21, 1998
Export Citation:
Assignee:
Hymo Co., Ltd.
International Classes:
B01D21/01; C02F11/14; C08F20/34; C08F20/56; C08F26/00; C08L39/00; (IPC1-7): B01D21/01; C02F11/14; C08L39/00
Domestic Patent References:
| JP10015600A | ||||
| JP9323100A | ||||
| JP9314200A | ||||
| JP9085013A | ||||
| JP8243600A | ||||
| JP7100500A | ||||
| JP6246300A | ||||
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| JP11019408A | ||||
| JP10305299A |