ZA948563B - Process for bleaching a chemical paper pulp - Google Patents

Process for bleaching a chemical paper pulp

Info

Publication number
ZA948563B
ZA948563B ZA948563A ZA948563A ZA948563B ZA 948563 B ZA948563 B ZA 948563B ZA 948563 A ZA948563 A ZA 948563A ZA 948563 A ZA948563 A ZA 948563A ZA 948563 B ZA948563 B ZA 948563B
Authority
ZA
South Africa
Prior art keywords
paper pulp
bleaching
chemical paper
pulp
decontamination
Prior art date
Application number
ZA948563A
Inventor
Francois Desprez
Johan Devenyns
Nicholas A Troughton
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=3887547&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA948563(B) "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
Publication of ZA948563B publication Critical patent/ZA948563B/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

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)

Abstract

Method of bleaching chemical paper pulp having undergone extensive cooking, involving a sequence of processing steps carried out without chlorine reagents. The pulp is subjected to decontamination from its transition metals and then to a step using alkaline hydrogen peroxide.
ZA948563A 1993-11-10 1994-10-31 Process for bleaching a chemical paper pulp ZA948563B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE9301251A BE1007757A3 (en) 1993-11-10 1993-11-10 Method of laundering of chemical pulp.

Publications (1)

Publication Number Publication Date
ZA948563B true ZA948563B (en) 1995-06-30

Family

ID=3887547

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA948563A ZA948563B (en) 1993-11-10 1994-10-31 Process for bleaching a chemical paper pulp

Country Status (14)

Country Link
EP (1) EP0728238B2 (en)
JP (1) JPH10500178A (en)
AT (1) ATE175738T1 (en)
AU (1) AU7993994A (en)
BE (1) BE1007757A3 (en)
BR (1) BR9408027A (en)
CA (1) CA2176246A1 (en)
DE (1) DE69416000D1 (en)
ES (1) ES2129142T5 (en)
FI (1) FI961975A (en)
MA (1) MA23369A1 (en)
NO (1) NO961889L (en)
WO (1) WO1995013420A1 (en)
ZA (1) ZA948563B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4967451B2 (en) 2006-05-17 2012-07-04 三菱瓦斯化学株式会社 Method for producing bleached pulp
CA2709526C (en) 2007-12-20 2016-02-02 Mitsubishi Gas Chemical Company Inc. Process for production of bleached pulp

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps
SE470065C (en) * 1991-04-30 1996-01-15 Eka Nobel Ab Treatment of chemical pulp with an acid and then a magnesium and calcium compound in chlorine-free bleaching
SE468355B (en) * 1991-04-30 1992-12-21 Eka Nobel Ab CHEMISTRY OF CHEMICAL MASS THROUGH TREATMENT WITH COMPLEX PICTURES AND OZONE
SE469842C (en) * 1992-01-21 1996-01-15 Sunds Defibrator Ind Ab Bleaching of chemical pulp with peroxide
SE9201477L (en) * 1992-05-11 1993-06-28 Kamyr Ab SEATING WHITE PILLOW WITHOUT USING CHLORIC CHEMICALS
BE1006056A3 (en) * 1992-07-06 1994-05-03 Solvay Interox Method of laundering of chemical pulp.
RU2097463C1 (en) * 1992-11-27 1997-11-27 Ека Нобель Актиеболаг Method of bleaching of delignification lignocellulose-containing pulp
BE1007700A3 (en) * 1993-11-04 1995-10-03 Solvay Interox Method of laundering of chemical pulp.

Also Published As

Publication number Publication date
MA23369A1 (en) 1995-07-01
BE1007757A3 (en) 1995-10-17
JPH10500178A (en) 1998-01-06
ATE175738T1 (en) 1999-01-15
FI961975A0 (en) 1996-05-09
BR9408027A (en) 1996-12-17
CA2176246A1 (en) 1995-05-18
ES2129142T3 (en) 1999-06-01
EP0728238A1 (en) 1996-08-28
FI961975A (en) 1996-07-09
NO961889D0 (en) 1996-05-09
NO961889L (en) 1996-05-09
EP0728238B2 (en) 2004-08-11
DE69416000D1 (en) 1999-02-25
EP0728238B1 (en) 1999-01-13
ES2129142T5 (en) 2005-04-01
WO1995013420A1 (en) 1995-05-18
AU7993994A (en) 1995-05-29

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