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Title:
DIGESTING LIQUOR FOR PULP AND METHOD FOR PRODUCING PULP
Document Type and Number:
WIPO Patent Application WO/2000/077294
Kind Code:
A1
Abstract:
A digesting liquor for pulp, characterized in that when a standard chip is digested with the digesting liquor under a temperature profile predetermined for a standard digesting liquor at a liquor ratio of 3.0 L/kg (based on absolutely dried chip) to produce a pulp having a kappa value of 18, the standard chip being a wood chip providing a pulp having a kappa value of 18 in a yield of 50 to 51 % by using a standard digesting liquor having a specific composition under the same conditions and at the same liquor ratio as described above, an increase in yield by 3.5 % or more and a decrease in the ratio of addition of an active alkali to a pulp by 2 % or more are achieved; and a method for producing a pulp using the digesting liquor. The digesting liquor can be used for improving the relationship between a kappa value and a pulp yield, and also for reducing the amount of chemicals to be used and reducing the load on a boiler for recovery.

Inventors:
ANDOH TATSUYA (JP)
TANAKA JUNJI (JP)
SUMINO TOSHIHIKO (JP)
WATANABE KEIGO (JP)
NAKAO MAKOTO (JP)
Application Number:
PCT/JP2000/003834
Publication Date:
December 21, 2000
Filing Date:
June 13, 2000
Export Citation:
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Assignee:
KAWASAKI KASEI CHEMICALS (JP)
JUJO PAPER CO LTD (JP)
ASAHI GLASS CO LTD (JP)
ANDOH TATSUYA (JP)
TANAKA JUNJI (JP)
SUMINO TOSHIHIKO (JP)
WATANABE KEIGO (JP)
NAKAO MAKOTO (JP)
International Classes:
D21C3/02; D21C3/22; (IPC1-7): D21C3/00
Domestic Patent References:
WO1997041295A11997-11-06
Foreign References:
JPS5729690A1982-02-17
JPH08218290A1996-08-27
JPH11100783A1999-04-13
Attorney, Agent or Firm:
Senmyo, Kenji (Kanda-Higashimatsushitacho Chiyoda-ku Tokyo, JP)
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