Title:
PRODUCTION OF UNBLEACHED KRAFT PULP
Document Type and Number:
Japanese Patent JPH101890
Kind Code:
A
Abstract:
To improve the brightness of a pulp without changing a cooking method and an apparatus and without deteriorating the pulp yield.
This method for producing an unbleached kraft pulp comprises a step for treating a pulp with hydrogen peroxide after removing a cooking liquor therefrom and washing the pulp. The step for treating the pulp with the hydrogen peroxide is preferably carried out under conditions of 1-10wt.% pulp concentration, 0.1-1wt.% hydrogen peroxide concentration (based on a dried pulp), pH7-12 and 10-60°C temperature.
More Like This:
| JPH01221586 | PRODUCTION OF BLEACHED PULP |
| WO/2022/098956 | HIGH POROSITY NON-WOOD PULP |
| WO/1995/035408 | DELIGNIFICATION OF CHEMICAL PULP WITH PEROXIDE IN THE PRESENCE OF TRANSITION METAL |
Inventors:
UCHIMOTO IWAHIRO
YAMAMOTO TOSHIMASA
HORINO MASASHI
YAMAGISHI YOSHIO
YAMAMOTO TOSHIMASA
HORINO MASASHI
YAMAGISHI YOSHIO
Application Number:
JP15090196A
Publication Date:
January 06, 1998
Filing Date:
June 12, 1996
Export Citation:
Assignee:
OJI PAPER CO
International Classes:
D21C9/16; (IPC1-7): D21C9/16
Next Patent: APPARATUS FOR IDENTIFYING SYSTEM OF PAPER MACHINE