DE4004364C2 - - Google Patents

Info

Publication number
DE4004364C2
DE4004364C2 DE4004364A DE4004364A DE4004364C2 DE 4004364 C2 DE4004364 C2 DE 4004364C2 DE 4004364 A DE4004364 A DE 4004364A DE 4004364 A DE4004364 A DE 4004364A DE 4004364 C2 DE4004364 C2 DE 4004364C2
Authority
DE
Germany
Prior art keywords
cyanamide
pulp
peroxide
stage
treatment
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE4004364A
Other languages
German (de)
English (en)
Other versions
DE4004364A1 (de
Inventor
Werner Dr. 8261 Kirchweidach De Sturm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
SKW Trostberg AG
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 AG filed Critical SKW Trostberg AG
Priority to DE4004364A priority Critical patent/DE4004364A1/de
Priority to NO910458A priority patent/NO176329C/no
Priority to AT91101890T priority patent/ATE103649T1/de
Priority to DE91101890T priority patent/DE59101249D1/de
Priority to EP91101890A priority patent/EP0442425B1/de
Priority to ES91101890T priority patent/ES2051531T3/es
Priority to CA002036173A priority patent/CA2036173C/en
Priority to FI910703A priority patent/FI910703L/fi
Publication of DE4004364A1 publication Critical patent/DE4004364A1/de
Application granted granted Critical
Publication of DE4004364C2 publication Critical patent/DE4004364C2/de
Granted legal-status Critical Current

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)
DE4004364A 1990-02-13 1990-02-13 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff Granted DE4004364A1 (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE4004364A DE4004364A1 (de) 1990-02-13 1990-02-13 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff
NO910458A NO176329C (no) 1990-02-13 1991-02-06 Fremgangsmåte for klorfri bleking og delignifisering av kjemisk masse
DE91101890T DE59101249D1 (de) 1990-02-13 1991-02-11 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
AT91101890T ATE103649T1 (de) 1990-02-13 1991-02-11 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff.
ES91101890T ES2051531T3 (es) 1990-02-13 1991-02-11 Procedimiento para el blanqueo y la deslignificacion sin cloro de un material celulosico.
CA002036173A CA2036173C (en) 1990-02-13 1991-02-12 Process for the chlorine-free bleaching and delignification of cellulose
FI910703A FI910703L (fi) 1990-02-13 1991-02-13 Foerfarande foer klorfri blekning och delignifiering av cellulosa.

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 (2)

Publication Number Publication Date
DE4004364A1 DE4004364A1 (de) 1991-08-14
DE4004364C2 true DE4004364C2 (cs) 1992-11-19

Family

ID=6400030

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4004364A Granted DE4004364A1 (de) 1990-02-13 1990-02-13 Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff
DE91101890T Expired - Fee Related DE59101249D1 (de) 1990-02-13 1991-02-11 Verfahren zur chlorfreien Bleiche und Delignifizierung von Zellstoff.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE91101890T Expired - Fee Related DE59101249D1 (de) 1990-02-13 1991-02-11 Verfahren zur chlorfreien Bleiche und Delignifizierung von Zellstoff.

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
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
NO176329C (no) 1995-03-15

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee