NO953444L - Process for bleaching pulp with chlorine-free chemicals - Google Patents

Process for bleaching pulp with chlorine-free chemicals

Info

Publication number
NO953444L
NO953444L NO953444A NO953444A NO953444L NO 953444 L NO953444 L NO 953444L NO 953444 A NO953444 A NO 953444A NO 953444 A NO953444 A NO 953444A NO 953444 L NO953444 L NO 953444L
Authority
NO
Norway
Prior art keywords
washer
pulp
bleaching
washing
chlorine
Prior art date
Application number
NO953444A
Other languages
Norwegian (no)
Other versions
NO953444D0 (en
Inventor
Kaj Henricson
Bertil Stromberg
Original Assignee
Ahlstroem Oy
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8537491&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NO953444(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ahlstroem Oy filed Critical Ahlstroem Oy
Publication of NO953444D0 publication Critical patent/NO953444D0/en
Publication of NO953444L publication Critical patent/NO953444L/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
    • 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
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the 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
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The present invention is directed to a method of washing pulp in connection with bleaching, in which method the pulp is bleached in a first bleaching arrangement, washed in a first washer, bleached in a second bleaching arrangement, and washed in a second washer in such a manner that the washing liquid is recirculated from said second washer to said first washer countercurrent to the pulp flow, characterized in introducing washing liquid to said second washer for washing the pulp coming from said second bleaching arrangement, displacing with said washing liquid at least two different filtrates, collecting said at least two different filtrates separately, and using said at least two filtrates separately upstream of said second washer as washing liquids.
NO953444A 1993-03-03 1995-09-01 Process for bleaching pulp with chlorine-free chemicals NO953444L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI930954A FI93232C (en) 1993-03-03 1993-03-03 Method for bleaching pulp with chlorine-free chemicals
PCT/FI1993/000222 WO1994020673A1 (en) 1993-03-03 1993-05-25 Method of bleaching pulp with chlorine-free chemicals

Publications (2)

Publication Number Publication Date
NO953444D0 NO953444D0 (en) 1995-09-01
NO953444L true NO953444L (en) 1995-10-19

Family

ID=8537491

Family Applications (1)

Application Number Title Priority Date Filing Date
NO953444A NO953444L (en) 1993-03-03 1995-09-01 Process for bleaching pulp with chlorine-free chemicals

Country Status (13)

Country Link
EP (2) EP0884415B1 (en)
JP (1) JP3276083B2 (en)
AT (2) ATE228181T1 (en)
AU (1) AU5370594A (en)
BR (1) BR9307858A (en)
CA (1) CA2157109C (en)
DE (2) DE69323566T2 (en)
ES (2) ES2130260T3 (en)
FI (3) FI93232C (en)
NO (1) NO953444L (en)
PT (1) PT884415E (en)
RU (1) RU2126471C1 (en)
WO (1) WO1994020673A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI89516B (en) 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande Foer blekning av cellulosamassa med Otson
FI103818B1 (en) * 1995-02-21 1999-09-30 Ahlstrom Machinery Oy Pulp Bleaching Process
US20080110584A1 (en) * 2006-11-15 2008-05-15 Caifang Yin Bleaching process with at least one extraction stage
FR2910027B1 (en) * 2006-12-13 2009-11-06 Itt Mfg Enterprises Inc PROCESS FOR WHITENING CHEMICAL STRIPPING PASTES BY FINAL OZONE TREATMENT AT HIGH TEMPERATURE
BRPI1012052A2 (en) 2009-05-28 2017-12-26 Gp Cellulose Gmbh hydrolyzed and chemically modified kraft fibers and kraft fiber production and bleaching methods
MX353539B (en) 2011-05-23 2018-01-17 Gp Cellulose Gmbh Star Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same.
CN104302831A (en) 2012-01-12 2015-01-21 Gp纤维素股份有限公司 Low viscosity kraft fiber having reduced yellowing properties and method of making and using same
CN106968127B (en) 2012-04-18 2019-03-01 Gp纤维素股份有限公司 Needlebush kraft pulp for viscose solution
JP6472758B2 (en) 2013-02-08 2019-02-20 ゲーペー ツェルローゼ ゲーエムベーハー Softwood kraft fiber with improved α-cellulose content and its use in the production of chemical cellulose products
BR112015019882A2 (en) 2013-03-14 2017-07-18 Gp Cellulose Gmbh oxidized bleached kraft fiber and methods for making kraft pulp and softwood kraft fiber and for bleaching multi-stage bleaching cellulose kraft pulp
BR112015020000A2 (en) 2013-03-15 2017-07-18 Gp Cellulose Gmbh chemically modified kraft fiber and manufacturing methods
FR3007044B1 (en) * 2013-06-13 2016-01-15 Air Liquide PROCESS FOR TREATING CHEMICAL PAPER PASTES BY OZONE TREATMENT IN THE PRESENCE OF MAGNESIUM IONS
AT515152B1 (en) * 2013-11-26 2015-12-15 Chemiefaser Lenzing Ag A process for pretreating recovered cotton fibers for use in the manufacture of regenerated cellulose moldings
EP3541849B1 (en) 2016-11-16 2023-11-15 GP Cellulose GmbH Modified cellulose from chemical fiber and methods of making and using the same
SE545759C2 (en) * 2022-06-20 2024-01-02 Valmet Oy Method for bleaching pulp from recycled textile material

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO144711C (en) * 1978-04-04 1981-10-21 Myrens Verksted As PROCEDURE FOR BLACKING OXYGEN-EQUIVALIZED CELLULOSE-containing OZONE
US4310384A (en) * 1979-01-11 1982-01-12 Weyerhaeuser Company Reducing chemical transfer between treatment stages
FI74752C (en) * 1986-03-20 1992-12-01 Ahlstroem Oy OVER ANCHORING OF CELLULOSE TV
DE69004492T3 (en) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Process for bleaching pulps containing lignocellulose.
AU636173B2 (en) * 1989-10-30 1993-04-22 Lenzing Aktiengesellschaft Method for the chlorine-free bleaching of pulps
US5567262A (en) * 1991-04-16 1996-10-22 Ahlstrom Machinery Inc. Two stage pressure diffuser
SE468355B (en) * 1991-04-30 1992-12-21 Eka Nobel Ab CHEMISTRY OF CHEMICAL MASS THROUGH TREATMENT WITH COMPLEX PICTURES AND OZONE
AT400153B (en) * 1991-05-02 1995-10-25 Voest Alpine Ind Anlagen METHOD FOR BLEACHING MATERIALS CONTAINING XYLAN AND LIGNOCELLULOSE

Also Published As

Publication number Publication date
AU5370594A (en) 1994-09-26
FI934036A0 (en) 1993-09-15
CA2157109A1 (en) 1994-09-15
PT884415E (en) 2003-03-31
RU2126471C1 (en) 1999-02-20
DE69332508D1 (en) 2003-01-02
BR9307858A (en) 1996-02-27
DE69323566T2 (en) 1999-07-15
CA2157109C (en) 2002-09-03
FI93232B (en) 1994-11-30
EP0884415A1 (en) 1998-12-16
FI930954A (en) 1994-09-04
EP0884415B1 (en) 2002-11-20
FI934036A (en) 1994-09-04
ATE228181T1 (en) 2002-12-15
FI98223B (en) 1997-01-31
EP0687321B1 (en) 1999-02-17
DE69323566D1 (en) 1999-03-25
DE69332508T2 (en) 2003-07-03
ES2186948T3 (en) 2003-05-16
FI93232C (en) 1995-03-10
FI954093A (en) 1995-10-17
FI930954A0 (en) 1993-03-03
FI954093A0 (en) 1995-08-30
ES2130260T3 (en) 1999-07-01
EP0687321A1 (en) 1995-12-20
JPH08509781A (en) 1996-10-15
JP3276083B2 (en) 2002-04-22
ATE176808T1 (en) 1999-03-15
NO953444D0 (en) 1995-09-01
WO1994020673A1 (en) 1994-09-15

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