Title:
【発明の名称】脱墨方法
Document Type and Number:
Japanese Patent JP2994786
Kind Code:
B2
Abstract:
PURPOSE:To obtain a deinking agent, excellent in ink removing ability and operability, having a high (b) value, capable of providing deinked pulp having a high whiteness with hardly any unpeeled ink and useful for recycling waste paper such as newspaper by using a specific compound. CONSTITUTION:The objective deinking agent consisting essentially of a compound expressed by the formula [R is H, 1-24C alkyl, alkenyl, cycloalkyl or alkylphenyl having 6-16C alkyl ; AO is 2-4C alkylene oxide; (p) is 0-5; (m) is 0-200; (n) is 1-4]. Furthermore, the above-mentioned deinking agent can be added in respective steps of pulping, kneading, dispersing, chemical mixing and refining; however, the deinking agent is preferably divided into the pulping step and subsequent steps and added. Its dividing weight ratio is (40/60)-(60/40) of the pulping step/subsequent steps. The amount added is preferably 0.03-1.0wt.% based on the raw material waste paper.
Inventors:
Urushiba Hideaki
Hamaguchi Corporation
Hamaguchi Corporation
Application Number:
JP10904191A
Publication Date:
December 27, 1999
Filing Date:
May 14, 1991
Export Citation:
Assignee:
Kao Corporation
International Classes:
D21C5/02; (IPC1-7): D21C5/02
Domestic Patent References:
| JP5663090A |
Attorney, Agent or Firm:
Kaoru Furuya (3 outside)