公开(公告)号：US12110242B2

公开(公告)日：2024-10-08

申请号：US17603586

申请日：2020-03-13

申请人： KURITA WATER INDUSTRIES LTD.

发明人： Ayako Sakamoto ,  Shigeru Sato ,  Kazuya Watanabe ,  Shihoko Sekiguchi

IPC分类号： C02F11/147 ,  B01D21/01 ,  C02F1/56 ,  C08F220/34 ,  C08F220/38

CPC分类号： C02F11/147 ,  B01D21/01 ,  C02F1/56 ,  C08F220/34 ,  C08F220/385 ,  C08F2800/10

摘要： Provided are: a sludge dehydrating agent which can exert a 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 with a polymer which has 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).