FI73017C - Foerfarande vid blekning av cellulosa. - Google Patents

Foerfarande vid blekning av cellulosa. Download PDF

Info

Publication number
FI73017C
FI73017C FI813954A FI813954A FI73017C FI 73017 C FI73017 C FI 73017C FI 813954 A FI813954 A FI 813954A FI 813954 A FI813954 A FI 813954A FI 73017 C FI73017 C FI 73017C
Authority
FI
Finland
Prior art keywords
pulp
activation
temperature
suitably
minutes
Prior art date
Application number
FI813954A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI73017B (fi
FI813954L (fi
Inventor
Hans Olof Samuelson
Original Assignee
Mo Och Domsjoe Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mo Och Domsjoe Ab filed Critical Mo Och Domsjoe Ab
Publication of FI813954L publication Critical patent/FI813954L/fi
Publication of FI73017B publication Critical patent/FI73017B/fi
Application granted granted Critical
Publication of FI73017C publication Critical patent/FI73017C/fi

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
FI813954A 1980-12-17 1981-12-09 Foerfarande vid blekning av cellulosa. FI73017C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8008874A SE445122B (sv) 1980-12-17 1980-12-17 Forfarande for delignifiering av cellulosamassa i nervaro av kvevedioxid
SE8008874 1980-12-17

Publications (3)

Publication Number Publication Date
FI813954L FI813954L (fi) 1982-06-18
FI73017B FI73017B (fi) 1987-04-30
FI73017C true FI73017C (fi) 1987-08-10

Family

ID=20342493

Family Applications (1)

Application Number Title Priority Date Filing Date
FI813954A FI73017C (fi) 1980-12-17 1981-12-09 Foerfarande vid blekning av cellulosa.

Country Status (8)

Country Link
JP (1) JPS57121689A (fr)
AU (1) AU548046B2 (fr)
CA (1) CA1159203A (fr)
FI (1) FI73017C (fr)
FR (1) FR2496138A1 (fr)
NO (1) NO158953C (fr)
NZ (1) NZ198925A (fr)
SE (1) SE445122B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434283B (sv) * 1982-12-01 1984-07-16 Mo Och Domsjoe Ab Forfarande for delignifiering av cellulosamassa med kveveoxider och syrgas

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1070909A (fr) * 1976-05-04 1980-02-05 Canadian Industries Limited Delignification au bioxyde d'azote et a l'oxygene

Also Published As

Publication number Publication date
AU7773881A (en) 1982-06-24
NO158953B (no) 1988-08-08
JPS57121689A (en) 1982-07-29
NO814309L (no) 1982-06-18
AU548046B2 (en) 1985-11-21
FR2496138A1 (fr) 1982-06-18
FR2496138B1 (fr) 1983-12-02
JPS6350466B2 (fr) 1988-10-07
SE8008874L (sv) 1982-06-18
SE445122B (sv) 1986-06-02
NZ198925A (en) 1984-09-28
FI73017B (fi) 1987-04-30
FI813954L (fi) 1982-06-18
CA1159203A (fr) 1983-12-27
NO158953C (no) 1988-11-16

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Legal Events

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MM Patent lapsed
MM Patent lapsed

Owner name: MO OCH DOMSJOE AKTIEBOLAG