NO176329C - Fremgangsmåte for klorfri bleking og delignifisering av kjemisk masse - Google Patents

Fremgangsmåte for klorfri bleking og delignifisering av kjemisk masse

Info

Publication number
NO176329C
NO176329C NO910458A NO910458A NO176329C NO 176329 C NO176329 C NO 176329C NO 910458 A NO910458 A NO 910458A NO 910458 A NO910458 A NO 910458A NO 176329 C NO176329 C NO 176329C
Authority
NO
Norway
Prior art keywords
delignification
chlorine
cyanamide
content
free bleaching
Prior art date
Application number
NO910458A
Other languages
English (en)
Norwegian (no)
Other versions
NO910458L (no
NO910458D0 (no
NO176329B (no
Inventor
Werner Sturm
Original Assignee
Sueddeutsche Kalkstickstoff
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 Sueddeutsche Kalkstickstoff filed Critical Sueddeutsche Kalkstickstoff
Publication of NO910458D0 publication Critical patent/NO910458D0/no
Publication of NO910458L publication Critical patent/NO910458L/no
Publication of NO176329B publication Critical patent/NO176329B/no
Publication of NO176329C publication Critical patent/NO176329C/no

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)
NO910458A 1990-02-13 1991-02-06 Fremgangsmåte for klorfri bleking og delignifisering av kjemisk masse NO176329C (no)

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 (4)

Publication Number Publication Date
NO910458D0 NO910458D0 (no) 1991-02-06
NO910458L NO910458L (no) 1991-08-14
NO176329B NO176329B (no) 1994-12-05
NO176329C true NO176329C (no) 1995-03-15

Family

ID=6400030

Family Applications (1)

Application Number Title Priority Date Filing Date
NO910458A NO176329C (no) 1990-02-13 1991-02-06 Fremgangsmåte for klorfri bleking og delignifisering av kjemisk masse

Country Status (7)

Country Link
EP (1) EP0442425B1 (cs)
AT (1) ATE103649T1 (cs)
CA (1) CA2036173C (cs)
DE (2) DE4004364A1 (cs)
ES (1) ES2051531T3 (cs)
FI (1) FI910703L (cs)
NO (1) NO176329C (cs)

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
WO1992012289A1 (en) * 1991-01-03 1992-07-23 Union Camp Patent Holding, Inc. 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
CA2036173C (en) 1996-01-23
EP0442425A1 (de) 1991-08-21
NO910458L (no) 1991-08-14
DE4004364C2 (cs) 1992-11-19
ATE103649T1 (de) 1994-04-15
FI910703A7 (fi) 1991-08-14
CA2036173A1 (en) 1991-08-14
NO910458D0 (no) 1991-02-06
ES2051531T3 (es) 1994-06-16
DE4004364A1 (de) 1991-08-14
EP0442425B1 (de) 1994-03-30
NO176329B (no) 1994-12-05
FI910703A0 (fi) 1991-02-13
DE59101249D1 (de) 1994-05-05
FI910703L (fi) 1991-08-14

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