NO993290L - Treatment of wood pulp with a chelator without using a bleaching tool - Google Patents

Treatment of wood pulp with a chelator without using a bleaching tool

Info

Publication number
NO993290L
NO993290L NO993290A NO993290A NO993290L NO 993290 L NO993290 L NO 993290L NO 993290 A NO993290 A NO 993290A NO 993290 A NO993290 A NO 993290A NO 993290 L NO993290 L NO 993290L
Authority
NO
Norway
Prior art keywords
pulp
bleaching
chelator
tool
treatment
Prior art date
Application number
NO993290A
Other languages
Norwegian (no)
Other versions
NO993290D0 (en
Inventor
Ulf Germgord
Jonas Lindquist
Original Assignee
Sunds Defibrator Ind 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 Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of NO993290D0 publication Critical patent/NO993290D0/en
Publication of NO993290L publication Critical patent/NO993290L/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
    • D21C9/02—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)

Abstract

A method at chlorine-free bleaching of pulp where metals are removed by means of chelating agent. The chelating agent is mixed with the pulp in at least one effective mixing step without intermediate washing, whereafter the pulp without an intermediate tower passes directly to a pulp washer. The total retention time shall be at maximum 15 minutes, calculated after the chelating agent addition.
NO993290A 1997-01-03 1999-07-02 Treatment of wood pulp with a chelator without using a bleaching tool NO993290L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9700030A SE508239C2 (en) 1997-01-03 1997-01-03 Treatment of pulp with complexing agents in at least one mixing step, without the use of the bleaching tower
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
NO993290D0 NO993290D0 (en) 1999-07-02
NO993290L true NO993290L (en) 1999-09-02

Family

ID=20405369

Family Applications (1)

Application Number Title Priority Date Filing Date
NO993290A NO993290L (en) 1997-01-03 1999-07-02 Treatment of wood pulp with a chelator without using a bleaching tool

Country Status (16)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101446054B (en) * 2008-12-23 2010-04-14 华南理工大学 Full chlorine-free bleaching method for pulp production line with an annual output of more than 50,000 tons

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9201477L (en) * 1992-05-11 1993-06-28 Kamyr Ab SEATING WHITE PILLOW WITHOUT USING CHLORIC CHEMICALS
SE502665C2 (en) * 1993-06-11 1995-12-04 Kvaerner Pulping Tech Methods and reactor for ozone bleaching
SE501836C2 (en) * 1993-09-21 1995-05-22 Sunds Defibrator Ind Ab Bleaching of chemical pulp whereby the pulp is treated with complexing agents before and after an ozone step
SE504803C2 (en) * 1995-08-24 1997-04-28 Sunds Defibrator Ind Ab Treatment of pulp with complexing agents in at least two mixing steps without intermediate washing

Also Published As

Publication number Publication date
DE69722445T2 (en) 2004-01-15
SE508239C2 (en) 1998-09-21
PT951599E (en) 2003-10-31
EP0951599B1 (en) 2003-05-28
JP2001508837A (en) 2001-07-03
NO993290D0 (en) 1999-07-02
ID20003A (en) 1998-09-10
SE9700030D0 (en) 1997-01-03
ES2195123T3 (en) 2003-12-01
DE69722445D1 (en) 2003-07-03
ATE241725T1 (en) 2003-06-15
EP0951599A1 (en) 1999-10-27
NZ336204A (en) 1999-11-29
CN1242060A (en) 2000-01-19
CN1103832C (en) 2003-03-26
ZA9710418B (en) 1998-06-10
AU726599B2 (en) 2000-11-16
CA2275257A1 (en) 1998-07-09
WO1998029597A1 (en) 1998-07-09
AU4974197A (en) 1998-07-31
SE9700030L (en) 1998-07-04
BR9714252A (en) 2000-04-18

Similar Documents

Publication Publication Date Title
FI890656A0 (en) A stable, liquid laundry treatment composition, a method of making the same, and a method of softening textiles
NO972874L (en) Clear, concentrated, liquid fabric softener mixture
DE3364826D1 (en) Method of washing laundry, and continuous batch-type washing machine for carrying out the method
ES2161912T3 (en) COMPOSITION OF DETERGENT AND WASHING METHOD OF VAJILLA.
EP0195619A3 (en) Sanitising/destaining/rinsing process and compositions
MY149233A (en) Ion elution unit and washer furnished with ion elution unit
TR200001772T2 (en) A detergent composition and method for washing the shell
AU583782B2 (en) Textile treating compositions and methods
CA2243965A1 (en) Laundry additive compositions including dispersible polyolefin and method for using same
ES8701876A1 (en) Process of bleaching laundry
ID19415A (en) WOOD BLEACHING BLEACHING PROCESS
NO993290D0 (en) Treatment of wood pulp with a chelator without using a bleaching tool
TR199701587A2 (en) The method of operating a dishwasher.
NO980753D0 (en) Treatment of pulp with chelating agent in at least two steps without intermediate washing
SE9503004L (en) Bleaching of pulp
SE9403396D0 (en) Bleaching of pulp
SE9303066D0 (en) Bleaching of chemical pulp
JPS5338899A (en) Method of treating laundry drain by inverse osmosis
SE9303644L (en) Method of separating metal ions from pulp in connection with bleaching of the pulp
ATE201440T1 (en) POWDERED ENZYME BLEACH AND DETERGENT
JPS52130157A (en) Apparatus for introducing finishing agents or the like
KR970027446A (en) Improved automatic washing machine rinsing method
TR199900557T2 (en) The process of pressing the laundry into water and bleaching compositions.