FI961895A - Procedure for bleaching chemical pulp - Google Patents

Procedure for bleaching chemical pulp Download PDF

Info

Publication number
FI961895A
FI961895A FI961895A FI961895A FI961895A FI 961895 A FI961895 A FI 961895A FI 961895 A FI961895 A FI 961895A FI 961895 A FI961895 A FI 961895A FI 961895 A FI961895 A FI 961895A
Authority
FI
Finland
Prior art keywords
chemical pulp
procedure
bleaching chemical
pulp
bleaching
Prior art date
Application number
FI961895A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI961895A0 (en
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=FI961895(A) "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 FI961895A0 publication Critical patent/FI961895A0/en
Publication of FI961895A publication Critical patent/FI961895A/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.
FI961895A 1993-11-04 1996-05-03 Procedure for bleaching chemical pulp FI961895A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9301215A BE1007700A3 (en) 1993-11-04 1993-11-04 Method of laundering of chemical pulp.
PCT/EP1994/003591 WO1995012709A1 (en) 1993-11-04 1994-10-28 Process for bleaching a chemical pulp

Publications (2)

Publication Number Publication Date
FI961895A0 FI961895A0 (en) 1996-05-03
FI961895A true FI961895A (en) 1996-05-03

Family

ID=3887524

Family Applications (1)

Application Number Title Priority Date Filing Date
FI961895A FI961895A (en) 1993-11-04 1996-05-03 Procedure for bleaching 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
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
MA23365A1 (en) 1995-07-01
EP0726979B1 (en) 1998-05-13
NO961817D0 (en) 1996-05-03

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