ES2195123T3 - PAPER PASTA TREATMENT WITH A CHELATING AGENT WITHOUT USING WHITENING TOWER. - Google Patents

PAPER PASTA TREATMENT WITH A CHELATING AGENT WITHOUT USING WHITENING TOWER.

Info

Publication number
ES2195123T3
ES2195123T3 ES97912616T ES97912616T ES2195123T3 ES 2195123 T3 ES2195123 T3 ES 2195123T3 ES 97912616 T ES97912616 T ES 97912616T ES 97912616 T ES97912616 T ES 97912616T ES 2195123 T3 ES2195123 T3 ES 2195123T3
Authority
ES
Spain
Prior art keywords
chelating agent
pulp
paper
whitening tower
pasta
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.)
Expired - Lifetime
Application number
ES97912616T
Other languages
Spanish (es)
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
Application granted granted Critical
Publication of ES2195123T3 publication Critical patent/ES2195123T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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)

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.
ES97912616T 1997-01-03 1997-11-06 PAPER PASTA TREATMENT WITH A CHELATING AGENT WITHOUT USING WHITENING TOWER. Expired - Lifetime ES2195123T3 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES2195123T3 true ES2195123T3 (en) 2003-12-01

Family

ID=20405369

Family Applications (1)

Application Number Title Priority Date Filing Date
ES97912616T Expired - Lifetime ES2195123T3 (en) 1997-01-03 1997-11-06 PAPER PASTA TREATMENT WITH A CHELATING AGENT WITHOUT USING WHITENING TOWER.

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
SE469387B (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
EP0951599B1 (en) 2003-05-28
NO993290D0 (en) 1999-07-02
NZ336204A (en) 1999-11-29
BR9714252A (en) 2000-04-18
AU726599B2 (en) 2000-11-16
WO1998029597A1 (en) 1998-07-09
CN1242060A (en) 2000-01-19
PT951599E (en) 2003-10-31
ID20003A (en) 1998-09-10
CN1103832C (en) 2003-03-26
SE508239C2 (en) 1998-09-21
SE9700030L (en) 1998-07-04
NO993290L (en) 1999-09-02
EP0951599A1 (en) 1999-10-27
ZA9710418B (en) 1998-06-10
CA2275257A1 (en) 1998-07-09
DE69722445D1 (en) 2003-07-03
DE69722445T2 (en) 2004-01-15
JP2001508837A (en) 2001-07-03
AU4974197A (en) 1998-07-31
ATE241725T1 (en) 2003-06-15
SE9700030D0 (en) 1997-01-03

Similar Documents

Publication Publication Date Title
PT1040222E (en) BLEACHING OF CHEMICAL PASTA WITH PERACIDO
MY105354A (en) Bleach catalysts and compositions containing same
ES2195123T3 (en) PAPER PASTA TREATMENT WITH A CHELATING AGENT WITHOUT USING WHITENING TOWER.
NO843255L (en) PROCEDURE FOR PEROXY WHITENING OF CELLULOSE-CONTAINING MATERIAL
ATE165636T1 (en) AMINOALKAN-DIPHOSPHONIC ACIDS FOR BLEACHING PULP
ES2185715T3 (en) PAPER PASTE WHITENING.
SE8604459L (en) CONTROL OF PEROXID WHITING OF DIFFERENT MASSES
SE9502962D0 (en) Bleaching of pulp
SE9501623L (en) Bleaching of pulp
SE501253E8 (en) Chlorine-free bleaching of chemical pulp
JPS5338899A (en) Method of treating laundry drain by inverse osmosis
SE9503004D0 (en) Bleaching of pulp
MX9801889A (en) Protease modified cellulase compositions.
TR199900557T2 (en) The process of pressing the laundry into water and bleaching compositions.
SE9502365L (en) Bleaching of lignocellulosic fibrous material
AR009340A1 (en) DETERGENT COMPOSITION COMPRISING CELLULASE AND AN ELIMINATING COMPOSITION OF CELLULASE, AND A DETERGENT ADDITIVE CONTAINING IT
KR900014673A (en) How to prevent recontamination of laundry in the washing machine
SE9303644L (en) Method of separating metal ions from pulp in connection with bleaching of the pulp
JPS53120856A (en) Washing method in washing machine and its device
ATE201440T1 (en) POWDERED ENZYME BLEACH AND DETERGENT
JPS5230074A (en) Dry treting method of raw excreta
JPS5393664A (en) Dehydrating and rising apparatus