CA1159203A - Process for bleaching cellulose pulp by activation with no.sub.2 and oxygen and alkali-extraction at elevated temperature with cellulose degradation - Google Patents

Process for bleaching cellulose pulp by activation with no.sub.2 and oxygen and alkali-extraction at elevated temperature with cellulose degradation

Info

Publication number
CA1159203A
CA1159203A CA000392232A CA392232A CA1159203A CA 1159203 A CA1159203 A CA 1159203A CA 000392232 A CA000392232 A CA 000392232A CA 392232 A CA392232 A CA 392232A CA 1159203 A CA1159203 A CA 1159203A
Authority
CA
Canada
Prior art keywords
pulp
process according
activation
range
stage
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA000392232A
Other languages
English (en)
French (fr)
Inventor
Hans O. Samuelson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo 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 Domsjo AB filed Critical Mo och Domsjo AB
Application granted granted Critical
Publication of CA1159203A publication Critical patent/CA1159203A/en
Expired legal-status Critical Current

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)
CA000392232A 1980-12-17 1981-12-14 Process for bleaching cellulose pulp by activation with no.sub.2 and oxygen and alkali-extraction at elevated temperature with cellulose degradation Expired CA1159203A (en)

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
SE80-08874-3 1980-12-17

Publications (1)

Publication Number Publication Date
CA1159203A true CA1159203A (en) 1983-12-27

Family

ID=20342493

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000392232A Expired CA1159203A (en) 1980-12-17 1981-12-14 Process for bleaching cellulose pulp by activation with no.sub.2 and oxygen and alkali-extraction at elevated temperature with cellulose degradation

Country Status (8)

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

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 (en) * 1976-05-04 1980-02-05 Canadian Industries Limited Nitrogen dioxide-oxygen delignification

Also Published As

Publication number Publication date
NO158953B (no) 1988-08-08
FI73017B (fi) 1987-04-30
NZ198925A (en) 1984-09-28
SE8008874L (sv) 1982-06-18
SE445122B (sv) 1986-06-02
AU7773881A (en) 1982-06-24
JPS6350466B2 (fi) 1988-10-07
FI73017C (fi) 1987-08-10
FR2496138A1 (fr) 1982-06-18
AU548046B2 (en) 1985-11-21
JPS57121689A (en) 1982-07-29
FR2496138B1 (fi) 1983-12-02
NO158953C (no) 1988-11-16
NO814309L (no) 1982-06-18
FI813954L (fi) 1982-06-18

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Legal Events

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