Title:
SLUDGE DEHYDRATING AGENT AND SLUDGE DEHYDRATION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/217772
Kind Code:
A1
Abstract:
Provided are: a sludge dehydrating agent which can exert an steady dehydrating effect on various types of sludge and has excellent dehydration performance; and a sludge dehydration method using the sludge dehydrating agent. The sludge dehydrating agent of the present invention comprises a polymer having a constituent unit derived from a cationic monomer, wherein a value k determined from an intrinsic viscosity [η]1 [dL/g] of a 1-mol/L aqueous sodium nitrate solution of the polymer at 30°C and an intrinsic viscosity [η]0.01 [dL/g] of a 0.01-mol/L aqueous sodium nitrate solution of the polymer at 30°C in accordance with formula (I) is 0.8 to 2.2 exclusive. k = ([η]0.01-[η]1)/9 (I)
Inventors:
SAKAMOTO AYAKO (JP)
SATO SHIGERU (JP)
WATANABE KAZUYA (JP)
SEKIGUCHI SHIHOKO (JP)
SATO SHIGERU (JP)
WATANABE KAZUYA (JP)
SEKIGUCHI SHIHOKO (JP)
Application Number:
PCT/JP2020/011232
Publication Date:
October 29, 2020
Filing Date:
March 13, 2020
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D21/01; C02F11/147
Domestic Patent References:
| WO2014030588A1 | 2014-02-27 | |||
| WO2008015769A1 | 2008-02-07 |
Foreign References:
| JP2018001047A | 2018-01-11 | |||
| JP2012170853A | 2012-09-10 | |||
| JP2009280649A | 2009-12-03 | |||
| JP2005144346A | 2005-06-09 | |||
| JP2020025939A | 2020-02-20 | |||
| JP2009280649A | 2009-12-03 | |||
| JP2005144346A | 2005-06-09 | |||
| JP2011224420A | 2011-11-10 | |||
| JP2012254430A | 2012-12-27 |
Other References:
JOURNAL OF POLYMER SCIENCE, vol. 37, 1959, pages 375 - 383
See also references of EP 3960266A4
See also references of EP 3960266A4
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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