AU726599B2 - Treatment of pulp with a chelating agent without using a bleaching tower - Google Patents

Treatment of pulp with a chelating agent without using a bleaching tower Download PDF

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Publication number
AU726599B2
AU726599B2 AU49741/97A AU4974197A AU726599B2 AU 726599 B2 AU726599 B2 AU 726599B2 AU 49741/97 A AU49741/97 A AU 49741/97A AU 4974197 A AU4974197 A AU 4974197A AU 726599 B2 AU726599 B2 AU 726599B2
Authority
AU
Australia
Prior art keywords
chelating agent
pulp
mixing
bleaching
stage
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
AU49741/97A
Other languages
English (en)
Other versions
AU4974197A (en
Inventor
Ulf Germgard
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
Valmet Fibertech 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 Valmet Fibertech AB filed Critical Valmet Fibertech AB
Publication of AU4974197A publication Critical patent/AU4974197A/en
Assigned to VALMET FIBERTECH AB reassignment VALMET FIBERTECH AB Amend patent request/document other than specification (104) Assignors: SUNDS DEFIBRATOR INDUSTRIES AB
Application granted granted Critical
Publication of AU726599B2 publication Critical patent/AU726599B2/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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Hybrid Cells (AREA)
  • Noodles (AREA)
AU49741/97A 1997-01-03 1997-11-06 Treatment of pulp with a chelating agent without using a bleaching tower Ceased AU726599B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9700030 1997-01-03
SE9700030A SE508239C2 (sv) 1997-01-03 1997-01-03 Behandling av massa med komplexbildare i minst ett blandningssteg, utan användning av blektorn
PCT/SE1997/001853 WO1998029597A1 (en) 1997-01-03 1997-11-06 Treatment of pulp with a chelating agent without using a bleaching tower

Publications (2)

Publication Number Publication Date
AU4974197A AU4974197A (en) 1998-07-31
AU726599B2 true AU726599B2 (en) 2000-11-16

Family

ID=20405369

Family Applications (1)

Application Number Title Priority Date Filing Date
AU49741/97A Ceased AU726599B2 (en) 1997-01-03 1997-11-06 Treatment of pulp with a chelating agent without using a bleaching tower

Country Status (16)

Country Link
EP (1) EP0951599B1 (pt)
JP (1) JP2001508837A (pt)
CN (1) CN1103832C (pt)
AT (1) ATE241725T1 (pt)
AU (1) AU726599B2 (pt)
BR (1) BR9714252A (pt)
CA (1) CA2275257A1 (pt)
DE (1) DE69722445T2 (pt)
ES (1) ES2195123T3 (pt)
ID (1) ID20003A (pt)
NO (1) NO993290L (pt)
NZ (1) NZ336204A (pt)
PT (1) PT951599E (pt)
SE (1) SE508239C2 (pt)
WO (1) WO1998029597A1 (pt)
ZA (1) ZA9710418B (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101446054B (zh) * 2008-12-23 2010-04-14 华南理工大学 年产5万吨以上纸浆生产线的全无氯漂白方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994029514A1 (en) * 1993-06-11 1994-12-22 Kvaerner Pulping Technologies Ab Ozone bleaching
WO1995008666A1 (en) * 1993-09-21 1995-03-30 Sunds Defibrator Industries Ab Chlorine-free bleaching of chemical pulp involving a two stage treatment with chelating agent
WO1997008380A1 (en) * 1995-08-24 1997-03-06 Sunds Defibrator Industries Ab Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE469387B (sv) * 1992-05-11 1993-06-28 Kamyr Ab Saett vid blekning av massa utan anvaendning av klorkemikalier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994029514A1 (en) * 1993-06-11 1994-12-22 Kvaerner Pulping Technologies Ab Ozone bleaching
WO1995008666A1 (en) * 1993-09-21 1995-03-30 Sunds Defibrator Industries Ab Chlorine-free bleaching of chemical pulp involving a two stage treatment with chelating agent
WO1997008380A1 (en) * 1995-08-24 1997-03-06 Sunds Defibrator Industries Ab Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing

Also Published As

Publication number Publication date
EP0951599B1 (en) 2003-05-28
SE508239C2 (sv) 1998-09-21
DE69722445D1 (de) 2003-07-03
AU4974197A (en) 1998-07-31
ES2195123T3 (es) 2003-12-01
WO1998029597A1 (en) 1998-07-09
PT951599E (pt) 2003-10-31
SE9700030L (sv) 1998-07-04
ATE241725T1 (de) 2003-06-15
CA2275257A1 (en) 1998-07-09
DE69722445T2 (de) 2004-01-15
CN1103832C (zh) 2003-03-26
ID20003A (id) 1998-09-10
JP2001508837A (ja) 2001-07-03
EP0951599A1 (en) 1999-10-27
NZ336204A (en) 1999-11-29
BR9714252A (pt) 2000-04-18
CN1242060A (zh) 2000-01-19
NO993290D0 (no) 1999-07-02
NO993290L (no) 1999-09-02
SE9700030D0 (sv) 1997-01-03
ZA9710418B (en) 1998-06-10

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Legal Events

Date Code Title Description
TC Change of applicant's name (sec. 104)

Owner name: VALMET FIBERTECH AB

Free format text: FORMER NAME: SUNDS DEFIBRATOR INDUSTRIES AB

FGA Letters patent sealed or granted (standard patent)