AU686024B2 - Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching - Google Patents

Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching

Info

Publication number
AU686024B2
AU686024B2 AU37124/95A AU3712495A AU686024B2 AU 686024 B2 AU686024 B2 AU 686024B2 AU 37124/95 A AU37124/95 A AU 37124/95A AU 3712495 A AU3712495 A AU 3712495A AU 686024 B2 AU686024 B2 AU 686024B2
Authority
AU
Australia
Prior art keywords
pulp
chelating agent
bleaching
agent
oxidizing agent
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
AU37124/95A
Other languages
English (en)
Other versions
AU3712495A (en
Inventor
Rolf Boman
Ulf Germgard
Kenneth Hafvenstrom
Jonas Lindquist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet AB
Original Assignee
Sunds Defibrator Industries AB
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
Application filed by Sunds Defibrator Industries AB filed Critical Sunds Defibrator Industries AB
Publication of AU3712495A publication Critical patent/AU3712495A/en
Application granted granted Critical
Publication of AU686024B2 publication Critical patent/AU686024B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • D21C9/1026—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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
AU37124/95A 1994-10-07 1995-10-05 Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching Ceased AU686024B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9403396A SE504826C2 (sv) 1994-10-07 1994-10-07 Behandling av kemisk massa med komplexbildare i närvaro av ett oxidationsmedel
SE9403396 1994-10-07
PCT/SE1995/001135 WO1996011298A1 (en) 1994-10-07 1995-10-05 Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching

Publications (2)

Publication Number Publication Date
AU3712495A AU3712495A (en) 1996-05-02
AU686024B2 true AU686024B2 (en) 1998-01-29

Family

ID=20395512

Family Applications (1)

Application Number Title Priority Date Filing Date
AU37124/95A Ceased AU686024B2 (en) 1994-10-07 1995-10-05 Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching

Country Status (10)

Country Link
EP (1) EP0784720A1 (sv)
JP (1) JPH10506965A (sv)
CN (1) CN1159842A (sv)
AU (1) AU686024B2 (sv)
BR (1) BR9509253A (sv)
CA (1) CA2199257A1 (sv)
FI (1) FI971401A (sv)
NO (1) NO971536D0 (sv)
SE (1) SE504826C2 (sv)
WO (1) WO1996011298A1 (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2189412C2 (ru) * 1996-09-11 2002-09-20 Солвей Интерокс (Сосьете Аноним) Способ отбеливания бумажной массы
BE1010617A3 (fr) * 1996-09-11 1998-11-03 Solvay Interox Procede de blanchiment de pate a papier.
BE1010678A3 (fr) * 1996-10-11 1998-11-03 Solvay Interox Procede de delignification et de blanchiment de pate a papier chimique.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222819A (en) * 1978-02-17 1980-09-16 Mo Och Domsjo Aktiebolag Process for the acid bleaching of cellulose pulp with peroxides
EP0402335A2 (en) * 1989-06-06 1990-12-12 Eka Nobel Ab Process for bleaching lignocellulose-containing pulps

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222819A (en) * 1978-02-17 1980-09-16 Mo Och Domsjo Aktiebolag Process for the acid bleaching of cellulose pulp with peroxides
EP0402335A2 (en) * 1989-06-06 1990-12-12 Eka Nobel Ab Process for bleaching lignocellulose-containing pulps

Also Published As

Publication number Publication date
FI971401A0 (sv) 1997-04-04
AU3712495A (en) 1996-05-02
CA2199257A1 (en) 1996-04-18
NO971536L (no) 1997-04-04
CN1159842A (zh) 1997-09-17
SE9403396D0 (sv) 1994-10-07
SE504826C2 (sv) 1997-05-12
NO971536D0 (no) 1997-04-04
FI971401A (sv) 1997-04-04
WO1996011298A1 (en) 1996-04-18
EP0784720A1 (en) 1997-07-23
JPH10506965A (ja) 1998-07-07
BR9509253A (pt) 1997-10-21
SE9403396L (sv) 1996-04-08

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