FI910703A7 - Menetelmä sellun valkaisemiseksi ja delignifioimiseksi ilman klooria - Google Patents

Menetelmä sellun valkaisemiseksi ja delignifioimiseksi ilman klooria Download PDF

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Publication number
FI910703A7
FI910703A7 FI910703A FI910703A FI910703A7 FI 910703 A7 FI910703 A7 FI 910703A7 FI 910703 A FI910703 A FI 910703A FI 910703 A FI910703 A FI 910703A FI 910703 A7 FI910703 A7 FI 910703A7
Authority
FI
Finland
Prior art keywords
bleaching
chlorine
delignifying pulp
delignifying
pulp
Prior art date
Application number
FI910703A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI910703L (fi
FI910703A0 (fi
Inventor
Werner Sturm
Original Assignee
Skw Trostberg Akteingesellschaft
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 Skw Trostberg Akteingesellschaft filed Critical Skw Trostberg Akteingesellschaft
Publication of FI910703A0 publication Critical patent/FI910703A0/fi
Publication of FI910703L publication Critical patent/FI910703L/fi
Publication of FI910703A7 publication Critical patent/FI910703A7/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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cereal-Derived Products (AREA)
  • Eye Examination Apparatus (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Gyroscopes (AREA)
FI910703A 1990-02-13 1991-02-13 Menetelmä sellun valkaisemiseksi ja delignifioimiseksi ilman klooria FI910703A7 (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4004364A DE4004364A1 (de) 1990-02-13 1990-02-13 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff

Publications (3)

Publication Number Publication Date
FI910703A0 FI910703A0 (fi) 1991-02-13
FI910703L FI910703L (fi) 1991-08-14
FI910703A7 true FI910703A7 (fi) 1991-08-14

Family

ID=6400030

Family Applications (1)

Application Number Title Priority Date Filing Date
FI910703A FI910703A7 (fi) 1990-02-13 1991-02-13 Menetelmä sellun valkaisemiseksi ja delignifioimiseksi ilman klooria

Country Status (7)

Country Link
EP (1) EP0442425B1 (enrdf_load_stackoverflow)
AT (1) ATE103649T1 (enrdf_load_stackoverflow)
CA (1) CA2036173C (enrdf_load_stackoverflow)
DE (2) DE4004364A1 (enrdf_load_stackoverflow)
ES (1) ES2051531T3 (enrdf_load_stackoverflow)
FI (1) FI910703A7 (enrdf_load_stackoverflow)
NO (1) NO176329C (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4031597A1 (de) * 1990-10-05 1992-04-09 Sueddeutsche Kalkstickstoff Verfahren zur chlorarmen bleiche und delignifizierung von zellstoff
CA2099881A1 (en) * 1991-01-03 1992-07-04 Omar F. Ali Chlorine-free process for bleaching lignocellulosic pulp
DE4138006A1 (de) * 1991-11-19 1993-05-27 Degussa Verfahren zur verbesserung des weissgehaltes bei der peroxidbleiche von zellstoffen durch den zusatz von cyanaten
US5620563A (en) * 1994-10-31 1997-04-15 Pulp Paper Res Inst Process for delignification and bleaching of chemical wood pulps with hydrogen peroxide and a dicyandiamide activator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196043A (en) * 1970-12-21 1980-04-01 Scott Paper Company Kraft pulp bleaching and recovery process
DE3544398A1 (de) * 1985-12-16 1987-06-19 Sueddeutsche Kalkstickstoff Verfahren zur bleiche und delignifizierung von zellstoffhaltigen produkten
DE3714107A1 (de) * 1987-04-28 1988-11-10 Sueddeutsche Kalkstickstoff Verfahren zur entfernung von rest-wasserstoffperoxid aus waessrigen loesungen
DE3802401A1 (de) * 1988-01-28 1989-08-03 Degussa Verfahren zur herstellung von halbgebleichtem kraftzellstoff

Also Published As

Publication number Publication date
NO910458L (no) 1991-08-14
CA2036173C (en) 1996-01-23
EP0442425B1 (de) 1994-03-30
EP0442425A1 (de) 1991-08-21
DE4004364A1 (de) 1991-08-14
ES2051531T3 (es) 1994-06-16
NO176329B (no) 1994-12-05
CA2036173A1 (en) 1991-08-14
ATE103649T1 (de) 1994-04-15
FI910703L (fi) 1991-08-14
DE4004364C2 (enrdf_load_stackoverflow) 1992-11-19
DE59101249D1 (de) 1994-05-05
NO176329C (no) 1995-03-15
NO910458D0 (no) 1991-02-06
FI910703A0 (fi) 1991-02-13

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Legal Events

Date Code Title Description
FD Application lapsed