ATE103649T1 - Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff. - Google Patents

Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff.

Info

Publication number
ATE103649T1
ATE103649T1 AT91101890T AT91101890T ATE103649T1 AT E103649 T1 ATE103649 T1 AT E103649T1 AT 91101890 T AT91101890 T AT 91101890T AT 91101890 T AT91101890 T AT 91101890T AT E103649 T1 ATE103649 T1 AT E103649T1
Authority
AT
Austria
Prior art keywords
delignification
cyanamide
content
pulp
chlorine
Prior art date
Application number
AT91101890T
Other languages
German (de)
English (en)
Inventor
Werner Dr 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
Application granted granted Critical
Publication of ATE103649T1 publication Critical patent/ATE103649T1/de

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)
  • Gyroscopes (AREA)
  • Eye Examination Apparatus (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Cereal-Derived Products (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
AT91101890T 1990-02-13 1991-02-11 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff. ATE103649T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4004364A DE4004364A1 (de) 1990-02-13 1990-02-13 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff
EP91101890A EP0442425B1 (de) 1990-02-13 1991-02-11 Verfahren zur chlorfreien Bleiche und Delignifizierung von Zellstoff

Publications (1)

Publication Number Publication Date
ATE103649T1 true ATE103649T1 (de) 1994-04-15

Family

ID=6400030

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91101890T ATE103649T1 (de) 1990-02-13 1991-02-11 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff.

Country Status (7)

Country Link
EP (1) EP0442425B1 (no)
AT (1) ATE103649T1 (no)
CA (1) CA2036173C (no)
DE (2) DE4004364A1 (no)
ES (1) ES2051531T3 (no)
FI (1) FI910703A (no)
NO (1) NO176329C (no)

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
JP2002517173A (ja) * 1991-01-03 2002-06-11 ユニオン キャンプ パテント ホウルディング インコーポレイテッド 塩素を使用しないリグノセルロースパルプの漂白法
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
NO910458D0 (no) 1991-02-06
EP0442425A1 (de) 1991-08-21
FI910703A0 (fi) 1991-02-13
DE4004364C2 (no) 1992-11-19
ES2051531T3 (es) 1994-06-16
DE59101249D1 (de) 1994-05-05
NO176329C (no) 1995-03-15
CA2036173C (en) 1996-01-23
FI910703A (fi) 1991-08-14
NO176329B (no) 1994-12-05
DE4004364A1 (de) 1991-08-14
CA2036173A1 (en) 1991-08-14
EP0442425B1 (de) 1994-03-30
NO910458L (no) 1991-08-14

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee