Title:
SLUDGE DEWATERING AGENT
Document Type and Number:
Japanese Patent JP3314431
Kind Code:
B2
Abstract:
PURPOSE: To lower moisture content of sludge without being influenced by variation in PH of the sludge, provide good freeners in a processing, and greatly increase the amount of processing by combining specific cationic macromolecule and amphoteric macromolecule of specific kind to form a sludge dewatering agent.
CONSTITUTION: A sludge dewatering agent is formed by combining cationic macromolecules containing 35-95 mole % of repeating units represented by a formula I and/or formula II, and amphoteric macromolecules of specific kind containing 10-98 mole % of repeating units represented by a formula III and 2-30 mole % of repeating units represented by a formula IV, wherein in the formulas I, II, R1, R2 are hydrogen atom or methyl group; X- is anion, in the l formula III, R3 is hydrogen atom or metyl group; R4 is a 1-4 C alkylene group; R5 a 1-4 C alkyl group; R6 hydrogen atom, a 1-4 C alkyl group or benzil group; A is -O- or -NH- ; Y- anion, and in the formula IV, R7, R8, 89, 810, and Z-, M+ each designate specific matter.
Inventors:
Shigeru Sawayama
Victory Tanaka
Victory Tanaka
Application Number:
JP1195793A
Publication Date:
August 12, 2002
Filing Date:
January 27, 1993
Export Citation:
Assignee:
Dia Nitrix Co., Ltd.
Hymo Co., Ltd.
Hymo Co., Ltd.
International Classes:
B01D21/01; C02F11/14; C08F8/46; C08F8/48; C08F26/00; C08F26/02; (IPC1-7): C02F11/14; B01D21/01
Domestic Patent References:
| JP5192513A | ||||
| JP56118798A | ||||
| JP1163208A |
Attorney, Agent or Firm:
Koji Hasegawa