ATE166118T1 - METHOD FOR BLEACHING PULP - Google Patents

METHOD FOR BLEACHING PULP

Info

Publication number
ATE166118T1
ATE166118T1 AT94931026T AT94931026T ATE166118T1 AT E166118 T1 ATE166118 T1 AT E166118T1 AT 94931026 T AT94931026 T AT 94931026T AT 94931026 T AT94931026 T AT 94931026T AT E166118 T1 ATE166118 T1 AT E166118T1
Authority
AT
Austria
Prior art keywords
pulp
bleaching pulp
bleaching
processing step
processing
Prior art date
Application number
AT94931026T
Other languages
German (de)
Inventor
Francois Desprez
Nicholas A Troughton
Johan Devenyns
Original Assignee
Solvay Interox
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=ATE166118(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Solvay Interox filed Critical Solvay Interox
Application granted granted Critical
Publication of ATE166118T1 publication Critical patent/ATE166118T1/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.
AT94931026T 1993-11-04 1994-10-28 METHOD FOR BLEACHING PULP ATE166118T1 (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
ATE166118T1 true ATE166118T1 (en) 1998-05-15

Family

ID=3887524

Family Applications (1)

Application Number Title Priority Date Filing Date
AT94931026T ATE166118T1 (en) 1993-11-04 1994-10-28 METHOD FOR BLEACHING 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
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
MA23365A1 (en) 1995-07-01
EP0726979B1 (en) 1998-05-13
NO961817D0 (en) 1996-05-03

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
RZN Patent revoked