FI73019C - Foerfarande foer delignifiering/blekning av cellulosamassa. - Google Patents

Foerfarande foer 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)
Swedish (sv)
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/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
    • D21C9/12—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 Foerfarande foer delignifiering/blekning av cellulosamassa. FI73019C (fi)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=20342344

Family Applications (1)

Application Number Title Priority Date Filing Date
FI813732A FI73019C (fi) 1980-11-27 1981-11-23 Foerfarande foer delignifiering/blekning av cellulosamassa.

Country Status (5)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014463A1 (en) * 1989-05-15 1990-11-29 Westvaco Corporation 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
SE442880B (sv) 1986-02-03
NO157223B (no) 1987-11-02
FI73019B (fi) 1987-04-30
FI813732L (fi) 1982-05-28
JPS6262199B2 (de) 1987-12-25
NO157223C (no) 1988-02-10
NO814024L (no) 1982-05-28
JPS57121690A (en) 1982-07-29
CA1149111A (en) 1983-07-05
SE8008336L (sv) 1982-05-28

Similar Documents

Publication Publication Date Title
FI59273B (fi) Foerfarande foer blekning av cellulosamassa
FI73750B (fi) Saett vid blekning av lignocellulosahaltigt material.
FI61925B (fi) Saett vid kontinuerlig alkalisk delignifiering av lignocellulosamaterial i tvao eller flera steg varav det sista med syrgas
FI87939C (fi) Foerfarande vid bleknig av cellulosamassa eller fraktion daerav, anordning att anvaendas foer genomfoerande av foerfarandet och en skruvpress, i synnerhet att anvaendas vid foerfarandet respektive i anordningen
US3874992A (en) Press alkaline extraction of cellulosic pulp
EP0056263A1 (de) Verfahren zur Verbesserung des Waschens von Cellulosepulpen, hergestellt aus Lignocellulosematerial
FI73020C (fi) Foerfarande foer delignifiering/blekning av cellulosamassa.
Springer et al. Treatment of softwood kraft pulps with peroxymonosulfate before oxygen delignification
FI117391B (fi) Menetelmä ja laitteisto massan käsittelemiseksi
EP0454642B1 (de) Verminderung der halogenierten organischen Verbindungen in den Bleichereiabwässern
FI73019C (fi) Foerfarande foer delignifiering/blekning av cellulosamassa.
US5385641A (en) Delignification of cellulosic raw materials using acetic acid, nitric acid and ozone
JPS6350464B2 (de)
WO1992012289A1 (en) Chlorine-free process for bleaching lignocellulosic pulp
FI74054B (fi) Saett vid blekning av cellulosahaltigt material.
JPH05195461A (ja) パルプの高脱リグニン選択性を得る方法
Andrews et al. Extended delignification kraft pulping of softwoods-effect of treatments on chips and pulp with sulfide-containing liquors
WO1995006772A1 (en) Improved method for bleaching lignocellulosic pulp
Colodette et al. Progress in eucalyptus kraft pulp bleaching
DE4107357C1 (de)
JPH03161586A (ja) リグノセルローズ含有繊維の非木質化処理方法
EP0863251A1 (de) Verfahren zur Herstellung gebleichtes Zellstoffs
FI122951B (fi) Menetelmä ja laitteisto selluloosamassan valmistamiseksi
JPH0742669B2 (ja) セルロ−ス性物質の脱リグニン法
JP2003064588A (ja) リグノセルロース物質のクラフト蒸解方法

Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: MO OCH DOMSJOE AKTIEBOLAG