MA23365A1 - PROCESS FOR THE BLEACHING OF A CHEMICAL PULP - Google Patents

PROCESS FOR THE BLEACHING OF A CHEMICAL PULP

Info

Publication number
MA23365A1
MA23365A1 MA23689A MA23689A MA23365A1 MA 23365 A1 MA23365 A1 MA 23365A1 MA 23689 A MA23689 A MA 23689A MA 23689 A MA23689 A MA 23689A MA 23365 A1 MA23365 A1 MA 23365A1
Authority
MA
Morocco
Prior art keywords
bleaching
chemical pulp
pulp
processing step
processing
Prior art date
Application number
MA23689A
Other languages
French (fr)
Inventor
Devenyns Johan
Desprez Francois
A Troughton Nicholas
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=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=MA23365(A1) "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 MA23365A1 publication Critical patent/MA23365A1/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)

Abstract

Process for bleaching a chemical pulp through a sequence of processing steps comprising, in this order, a step for decontaminating the pulp by removing its transition metals, an alcaline hydrogen peroxide processing step and a processing step using a non peroxygenated acid.
MA23689A 1993-11-04 1994-11-04 PROCESS FOR THE BLEACHING OF A CHEMICAL PULP MA23365A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE9301215A BE1007700A3 (en) 1993-11-04 1993-11-04 Method of laundering of chemical pulp.

Publications (1)

Publication Number Publication Date
MA23365A1 true MA23365A1 (en) 1995-07-01

Family

ID=3887524

Family Applications (1)

Application Number Title Priority Date Filing Date
MA23689A MA23365A1 (en) 1993-11-04 1994-11-04 PROCESS FOR THE BLEACHING OF A CHEMICAL PULP

Country Status (15)

Country Link
EP (1) EP0726979B1 (en)
JP (1) JPH09507096A (en)
AT (1) ATE166118T1 (en)
AU (1) AU7994094A (en)
BE (1) BE1007700A3 (en)
BR (1) BR9407976A (en)
CA (1) CA2175817A1 (en)
DE (1) DE69410286T2 (en)
ES (1) ES2119234T3 (en)
FI (1) FI961895A (en)
MA (1) MA23365A1 (en)
NO (1) NO961817D0 (en)
NZ (1) NZ274852A (en)
WO (1) WO1995012709A1 (en)
ZA (1) ZA948562B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007757A3 (en) * 1993-11-10 1995-10-17 Solvay Interox Method of laundering of chemical pulp.
FI105701B (en) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Method and arrangement for treatment of pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582692B1 (en) * 1985-05-29 1987-12-11 Atochem TREATMENT OF CHEMICAL PAPER PULP WITH HYDROGEN PEROXIDE FOR BLEACHING
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps
FR2655668B1 (en) * 1989-12-11 1995-06-09 Du Pin Cellulose PROCESS FOR BLEACHING CHEMICAL CELLULOSIC PASTA.

Also Published As

Publication number Publication date
ES2119234T3 (en) 1998-10-01
BE1007700A3 (en) 1995-10-03
ZA948562B (en) 1995-06-30
DE69410286T2 (en) 1998-12-10
BR9407976A (en) 1996-12-03
FI961895A0 (en) 1996-05-03
FI961895A (en) 1996-05-03
JPH09507096A (en) 1997-07-15
AU7994094A (en) 1995-05-23
ATE166118T1 (en) 1998-05-15
CA2175817A1 (en) 1995-05-11
NZ274852A (en) 1997-04-24
NO961817L (en) 1996-05-03
EP0726979A1 (en) 1996-08-21
WO1995012709A1 (en) 1995-05-11
DE69410286D1 (en) 1998-06-18
EP0726979B1 (en) 1998-05-13
NO961817D0 (en) 1996-05-03

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