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FI73019C - Förfarande för delignifiering/blekning av cellulosamassa. - Google Patents

Förfarande för delignifiering/blekning av cellulosamassa. Download PDF

Info

Publication number
FI73019C
FI73019C FI813732A FI813732A FI73019C FI 73019 C FI73019 C FI 73019C FI 813732 A FI813732 A FI 813732A FI 813732 A FI813732 A FI 813732A FI 73019 C FI73019 C FI 73019C
Authority
FI
Finland
Prior art keywords
chlorine
bleaching
pulp
added
chlorine dioxide
Prior art date
Application number
FI813732A
Other languages
English (en)
Finnish (fi)
Other versions
FI73019B (fi
FI813732L (fi
Inventor
John Rickard Bergstroem
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 FI813732L publication Critical patent/FI813732L/fi
Publication of FI73019B publication Critical patent/FI73019B/fi
Application granted granted Critical
Publication of FI73019C publication Critical patent/FI73019C/sv

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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
FI813732A 1980-11-27 1981-11-23 Förfarande för delignifiering/blekning av cellulosamassa. FI73019C (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8008336A SE442880B (sv) 1980-11-27 1980-11-27 Forfarande for delignifiering/blekning av cellulosamassa med klordioxid/klor i samma steg
SE8008336 1980-11-27

Publications (3)

Publication Number Publication Date
FI813732L FI813732L (fi) 1982-05-28
FI73019B FI73019B (fi) 1987-04-30
FI73019C true FI73019C (sv) 1987-08-10

Family

ID=20342344

Family Applications (1)

Application Number Title Priority Date Filing Date
FI813732A FI73019C (sv) 1980-11-27 1981-11-23 Förfarande för delignifiering/blekning av cellulosamassa.

Country Status (5)

Country Link
JP (1) JPS57121690A (sv)
CA (1) CA1149111A (sv)
FI (1) FI73019C (sv)
NO (1) NO157223C (sv)
SE (1) SE442880B (sv)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2033077C (en) * 1989-05-15 1996-08-27 Ronnie G. Hise Method for reducing chlorinated compounds produced during chlorination stage bleaching of pulp
US5268075A (en) * 1989-10-19 1993-12-07 North Carolina State University High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process

Also Published As

Publication number Publication date
NO157223B (no) 1987-11-02
FI73019B (fi) 1987-04-30
FI813732L (fi) 1982-05-28
SE442880B (sv) 1986-02-03
SE8008336L (sv) 1982-05-28
NO157223C (no) 1988-02-10
JPS57121690A (en) 1982-07-29
JPS6262199B2 (sv) 1987-12-25
NO814024L (no) 1982-05-28
CA1149111A (en) 1983-07-05

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Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: MO OCH DOMSJOE AKTIEBOLAG