Title:
パルプの白色度の増進及び漂白薬品の使用における最適化の方法
Document Type and Number:
Japanese Patent JP2007530818
Kind Code:
A
Abstract:
Mechanical or Chemical pulp is treated with about 0.01 weight % to about 5 weight % of a Mixture. The Mixture is water; diethylenetriaminepentakis(methyl)phosphonic acid or its known salts; polyacrylic acid or its known salts; and optionally one or more inert compounds. This Mixture acts to either maintain the brightness level of the pulp at the target level or to increase the brightness level of the pulp. In addition the Mixture allows for maintaining the pulp at the target level of brightness even when the amounts of other ingredients, such as hydrogen peroxide, hydrosulfite, sodium silicate and magnesium, that are typically added to the pulp, are reduced.
Inventors:
Shevchenko, Sergey, M.
Doug Zirara, Prasard, Wai.
Doug Zirara, Prasard, Wai.
Application Number:
JP2007506177A
Publication Date:
November 01, 2007
Filing Date:
February 25, 2005
Export Citation:
Assignee:
NALCO COMPANY
International Classes:
D21C9/16; C08K5/17; C08K5/5317; C08L33/02; D21C1/00; D21C9/00; D21C9/10; D21H11/20
Domestic Patent References:
| JPS61155208A | 1986-07-14 | |||
| JPS62164800A | 1987-07-21 | |||
| JPS63120187A | 1988-05-24 | |||
| JPH06166981A | 1994-06-14 | |||
| JPH10121393A | 1998-05-12 | |||
| JP2003003388A | 2003-01-08 |
Attorney, Agent or Firm:
Kishimoto Tatsuto
Akihiko Yamashita
Tetsuro Hoshino
Akihiko Yamashita
Tetsuro Hoshino