NZ274852A - Pulp bleaching process comprising steps qpa in that order (ie decontamination, alkaline hydrogen peroxide bleaching, non peroxygenated acid) - Google Patents

Pulp bleaching process comprising steps qpa in that order (ie decontamination, alkaline hydrogen peroxide bleaching, non peroxygenated acid)

Info

Publication number
NZ274852A
NZ274852A NZ274852A NZ27485294A NZ274852A NZ 274852 A NZ274852 A NZ 274852A NZ 274852 A NZ274852 A NZ 274852A NZ 27485294 A NZ27485294 A NZ 27485294A NZ 274852 A NZ274852 A NZ 274852A
Authority
NZ
New Zealand
Prior art keywords
pulp
content
sequence
acid
steps
Prior art date
Application number
NZ274852A
Other languages
English (en)
Inventor
Francois Desprez
Nicholas A Troughton
Johan Devenyns
Original Assignee
Solvay Interox Sa
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3887524&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NZ274852(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Solvay Interox Sa filed Critical Solvay Interox Sa
Publication of NZ274852A publication Critical patent/NZ274852A/en

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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C9/1042—Use of chelating agents
    • 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
NZ274852A 1993-11-04 1994-10-28 Pulp bleaching process comprising steps qpa in that order (ie decontamination, alkaline hydrogen peroxide bleaching, non peroxygenated acid) NZ274852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE9301215A BE1007700A3 (fr) 1993-11-04 1993-11-04 Procede pour le blanchiment d'une pate a papier chimique.

Publications (1)

Publication Number Publication Date
NZ274852A true NZ274852A (en) 1997-04-24

Family

ID=3887524

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ274852A NZ274852A (en) 1993-11-04 1994-10-28 Pulp bleaching process comprising steps qpa in that order (ie decontamination, alkaline hydrogen peroxide bleaching, non peroxygenated acid)

Country Status (15)

Country Link
EP (1) EP0726979B1 (fi)
JP (1) JPH09507096A (fi)
AT (1) ATE166118T1 (fi)
AU (1) AU7994094A (fi)
BE (1) BE1007700A3 (fi)
BR (1) BR9407976A (fi)
CA (1) CA2175817A1 (fi)
DE (1) DE69410286T2 (fi)
ES (1) ES2119234T3 (fi)
FI (1) FI961895A0 (fi)
MA (1) MA23365A1 (fi)
NO (1) NO961817L (fi)
NZ (1) NZ274852A (fi)
WO (1) WO1995012709A1 (fi)
ZA (1) ZA948562B (fi)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007757A3 (fr) * 1993-11-10 1995-10-17 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
FI105701B (fi) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Menetelmä ja laitteisto massan käsittelemiseksi

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582692B1 (fr) * 1985-05-29 1987-12-11 Atochem Traitement de pates papetieres chimiques par le peroxyde d'hydrogene en vue de leur blanchiment
DE69004492T3 (de) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen.
FR2655668B1 (fr) * 1989-12-11 1995-06-09 Du Pin Cellulose Procede de blanchiment de pates cellulosiques chimiques.

Also Published As

Publication number Publication date
NO961817D0 (no) 1996-05-03
MA23365A1 (fr) 1995-07-01
WO1995012709A1 (fr) 1995-05-11
BR9407976A (pt) 1996-12-03
CA2175817A1 (fr) 1995-05-11
NO961817L (no) 1996-05-03
ATE166118T1 (de) 1998-05-15
AU7994094A (en) 1995-05-23
JPH09507096A (ja) 1997-07-15
FI961895A (fi) 1996-05-03
ES2119234T3 (es) 1998-10-01
DE69410286D1 (de) 1998-06-18
BE1007700A3 (fr) 1995-10-03
FI961895A0 (fi) 1996-05-03
EP0726979A1 (fr) 1996-08-21
ZA948562B (en) 1995-06-30
DE69410286T2 (de) 1998-12-10
EP0726979B1 (fr) 1998-05-13

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