Title:
DEINKING METHOD, METHOD FOR PRODUCING RECYCLED PAPER, AND DEINKING AGENT
Document Type and Number:
Japanese Patent JP2019035172
Kind Code:
A
Abstract:
To provide a deinking method having moderate foaming and excellent deinking properties.SOLUTION: A deinking method includes a step of adding a mixture of Component A, a compound represented by the following formula (1) and Component B, a compound represented by the following formula (2) with Component C, water, prior to a floatation step. R-O-[(PO)(EO)]-H (1) [where, Ris an alkyl group or alkenyl group having carbon atoms of 12 or more and 22 or less, PO is a propyleneoxy group, m is an average number of moles of added PO group(s) to denote 20 or more and 50 or less, EO is an ethyleneoxy group, n is an average number of moles of added EO group(s) to denote 20 or more and 55 or less, the ratio of m and n (m/n) is 0.5 or more and 2 or less. PO and EO may be block or random, and there is no limitation in the order of addition thereof]. R-O-(EO)-SOM (2) [where, Ris an alkyl group or alkenyl group having carbon atoms of 8 or more and 22 or less, EO is an ethyleneoxy group, p is an average number of moles of added EO group(s) to denote 0.5 or more and 10 or less, M is a cation or a hydrogen atom].SELECTED DRAWING: None
Inventors:
IKEDA YASUSHI
HAMADA YOSHITO
HAMADA YOSHITO
Application Number:
JP2017158428A
Publication Date:
March 07, 2019
Filing Date:
August 21, 2017
Export Citation:
Assignee:
KAO CORP
International Classes:
D21C5/02
Attorney, Agent or Firm:
Satoshi Furuya
Yoshitsune Kazumasa
Yoshitsune Kazumasa