NO993120D0 - Method of treating filtrates from bleaches with oxygen - Google Patents

Method of treating filtrates from bleaches with oxygen

Info

Publication number
NO993120D0
NO993120D0 NO993120A NO993120A NO993120D0 NO 993120 D0 NO993120 D0 NO 993120D0 NO 993120 A NO993120 A NO 993120A NO 993120 A NO993120 A NO 993120A NO 993120 D0 NO993120 D0 NO 993120D0
Authority
NO
Norway
Prior art keywords
pulp
oxygen
bleaching
part flow
bleaches
Prior art date
Application number
NO993120A
Other languages
Norwegian (no)
Other versions
NO993120L (en
NO325725B1 (en
Inventor
M Monica Bokstr
Peter Hardmeier
Bj Rn Jansson
Martin Petersson
M Anna Tigerstr
Original Assignee
Aga Ab Publ
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 Aga Ab Publ filed Critical Aga Ab Publ
Publication of NO993120D0 publication Critical patent/NO993120D0/en
Publication of NO993120L publication Critical patent/NO993120L/en
Publication of NO325725B1 publication Critical patent/NO325725B1/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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • D21C11/0028—Effluents derived from the washing or bleaching plants
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0057—Oxidation of liquors, e.g. in order to reduce the losses of sulfur compounds, followed by evaporation or combustion if the liquor in question is a black liquor

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)

Abstract

A method for the treatment of cellulose fibres in a pulp stream (22) comprises the following steps. A pulp is prepared (21). The pulp is subjected to a bleaching, comprising at least a bleaching step (25, 30) by the addition of an oxidizing bleaching agent. After the bleaching, liquid is removed (28, 33) from the pulp while obtaining a residue liquid and at least a part flow of the residue liquid obtained is conveyed back to the pulp stream (22) via a transport conduit by means of a pump device. Said part flow of the residue liquid is treated by oxygen (45) by the supply of oxygen to the part flow downstream of the pump device.
NO19993120A 1996-12-27 1999-06-23 Method of treating filtrates from bleaches with oxygen NO325725B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9604802A SE9604802L (en) 1996-12-27 1996-12-27 Process for treating cellulose fibers
PCT/SE1997/002214 WO1998029598A1 (en) 1996-12-27 1997-12-23 Treatment of bleach plant filtrates with oxygen

Publications (3)

Publication Number Publication Date
NO993120D0 true NO993120D0 (en) 1999-06-23
NO993120L NO993120L (en) 1999-08-25
NO325725B1 NO325725B1 (en) 2008-07-07

Family

ID=20405154

Family Applications (1)

Application Number Title Priority Date Filing Date
NO19993120A NO325725B1 (en) 1996-12-27 1999-06-23 Method of treating filtrates from bleaches with oxygen

Country Status (10)

Country Link
EP (1) EP0950136B1 (en)
JP (1) JP2001519858A (en)
AT (1) ATE267288T1 (en)
AU (1) AU5582598A (en)
BR (1) BR9714440A (en)
CA (1) CA2275710C (en)
DE (1) DE69729215T2 (en)
NO (1) NO325725B1 (en)
SE (1) SE9604802L (en)
WO (1) WO1998029598A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE522161C2 (en) * 1999-06-17 2004-01-20 Kvaerner Pulping Tech Method and device for oxygen delignification with improved copper reduction
FI117391B (en) 2000-05-16 2006-09-29 Andritz Oy Method and apparatus for pulping
FI20065494A0 (en) * 2006-07-14 2006-07-14 Linde Ag Process for treating a filtrate with oxygen and using oxygen to reduce harmful components of a filtrate
FI126551B (en) * 2009-11-25 2017-02-15 Andritz Oy A method for treating fluid flows at a pulp mill
WO2015197917A1 (en) * 2014-06-23 2015-12-30 Metsä Fibre Oy Method of delignifying fibrous suspensions of alkaline cooking

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564443A1 (en) * 1992-03-15 1993-10-06 Kamyr, Inc. Treatment of bleach plant filtrates
US5509999A (en) * 1993-03-24 1996-04-23 Kamyr, Inc. Treatment of bleach plant effluents

Also Published As

Publication number Publication date
EP0950136B1 (en) 2004-05-19
EP0950136A1 (en) 1999-10-20
NO993120L (en) 1999-08-25
AU5582598A (en) 1998-07-31
CA2275710C (en) 2006-03-14
DE69729215D1 (en) 2004-06-24
SE9604802L (en) 1998-06-28
WO1998029598A1 (en) 1998-07-09
SE9604802D0 (en) 1996-12-27
CA2275710A1 (en) 1998-07-09
JP2001519858A (en) 2001-10-23
ATE267288T1 (en) 2004-06-15
BR9714440A (en) 2000-03-21
NO325725B1 (en) 2008-07-07
DE69729215T2 (en) 2005-05-25

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Legal Events

Date Code Title Description
MM1K Lapsed by not paying the annual fees