CA2199257A1 - 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
CA2199257A1
CA2199257A1 CA 2199257 CA2199257A CA2199257A1 CA 2199257 A1 CA2199257 A1 CA 2199257A1 CA 2199257 CA2199257 CA 2199257 CA 2199257 A CA2199257 A CA 2199257A CA 2199257 A1 CA2199257 A1 CA 2199257A1
Authority
CA
Canada
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.)
Abandoned
Application number
CA 2199257
Other languages
English (en)
French (fr)
Inventor
Kenneth Hafvenstrom
Jonas Lindquist
Ulf Germgard
Rolf Boman
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
Individual
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 Individual filed Critical Individual
Publication of CA2199257A1 publication Critical patent/CA2199257A1/en
Abandoned 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)
CA 2199257 1994-10-07 1995-10-05 Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching Abandoned CA2199257A1 (en)

Applications Claiming Priority (2)

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
SE9403396-6 1994-10-07

Publications (1)

Publication Number Publication Date
CA2199257A1 true CA2199257A1 (en) 1996-04-18

Family

ID=20395512

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2199257 Abandoned CA2199257A1 (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.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
ATE97179T1 (de) * 1989-06-06 1993-11-15 Eka Nobel Ab Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen.

Also Published As

Publication number Publication date
FI971401A0 (sv) 1997-04-04
AU3712495A (en) 1996-05-02
NO971536L (no) 1997-04-04
CN1159842A (zh) 1997-09-17
SE9403396D0 (sv) 1994-10-07
AU686024B2 (en) 1998-01-29
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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Legal Events

Date Code Title Description
FZDE Dead