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Title:
パルプ蒸解方法
Document Type and Number:
Japanese Patent JP4704639
Kind Code:
B2
Abstract:
A lignocellulose material is cooked by means of an alkaline cooking liquor containing polysulfides in the presence of a quinone-hydroquinone compound, of which the oxidation-reduction potential in the form present during the cooking, which potential is a value calculated as a standard oxidation-reduction potential (Ea) with a hydrogen ion activity of 1, is within a range of from 0.12 to 0.25V to the standard hydrogen electrode potential. It is thereby possible to cook the lignocellulose material with a low Kappa number and in good yield and at the same time, to reduce the amount of the chemical solution used and to reduce the load on a recovery boiler.

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Inventors:
Tatsuya Ando
Junji Tanaka
Keigo Watanabe
Yasunori Minamisato
Makoto Nakao
Application Number:
JP2001503732A
Publication Date:
June 15, 2011
Filing Date:
June 13, 2000
Export Citation:
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Assignee:
Kawasaki Chemical Industry Co., Ltd.
NIPPON PAPER INDUSTRIES CO.,LTD.
International Classes:
D21C3/00; D21C3/02; D21C3/22
Domestic Patent References:
JPS5729690A1982-02-17
JPH08218290A1996-08-27
JPH11100783A1999-04-13
JPH09268488A1997-10-14
JPH07189153A1995-07-25
JPH10280290A1998-10-20
Foreign References:
WO1997041295A11997-11-06
Attorney, Agent or Firm:
Hirokuni Kamo



 
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