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FI954093A - Method for treating pulp with non-chlorine chemicals - Google Patents

Method for treating pulp with non-chlorine chemicals Download PDF

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Publication number
FI954093A
FI954093A FI954093A FI954093A FI954093A FI 954093 A FI954093 A FI 954093A FI 954093 A FI954093 A FI 954093A FI 954093 A FI954093 A FI 954093A FI 954093 A FI954093 A FI 954093A
Authority
FI
Finland
Prior art keywords
washer
pulp
washing
bleaching
washing liquid
Prior art date
Application number
FI954093A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI954093A0 (en
Inventor
Kaj Henricson
Bertil Stroemberg
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=FI954093(A) "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
Priority to FI954093A priority Critical patent/FI954093A/en
Publication of FI954093A0 publication Critical patent/FI954093A0/en
Publication of FI954093A publication Critical patent/FI954093A/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.
FI954093A 1993-03-03 1995-08-30 Method for treating pulp with non-chlorine chemicals FI954093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI954093A FI954093A (en) 1993-03-03 1995-08-30 Method for treating pulp with non-chlorine chemicals

Applications Claiming Priority (3)

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
FI954093A FI954093A (en) 1993-03-03 1995-08-30 Method for treating pulp with non-chlorine chemicals

Publications (2)

Publication Number Publication Date
FI954093A0 FI954093A0 (en) 1995-08-30
FI954093A true FI954093A (en) 1995-10-17

Family

ID=8537491

Family Applications (3)

Application Number Title Priority Date Filing Date
FI930954A FI93232C (en) 1993-03-03 1993-03-03 Method for bleaching pulp with chlorine-free chemicals
FI934036A FI98223B (en) 1993-03-03 1993-09-15 Method of bleaching of pulp with chlorine-free chemicals
FI954093A FI954093A (en) 1993-03-03 1995-08-30 Method for treating pulp with non-chlorine chemicals

Family Applications Before (2)

Application Number Title Priority Date Filing Date
FI930954A FI93232C (en) 1993-03-03 1993-03-03 Method for bleaching pulp with chlorine-free chemicals
FI934036A FI98223B (en) 1993-03-03 1993-09-15 Method of bleaching of pulp with chlorine-free chemicals

Country Status (13)

Country Link
EP (2) EP0687321B1 (en)
JP (1) JP3276083B2 (en)
AT (2) ATE176808T1 (en)
AU (1) AU5370594A (en)
BR (1) BR9307858A (en)
CA (1) CA2157109C (en)
DE (2) DE69332508T2 (en)
ES (2) ES2186948T3 (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
FI103818B (en) * 1995-02-21 1999-09-30 Ahlstrom Machinery Oy Method for bleaching pulp
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
MX2011012494A (en) 2009-05-28 2012-02-21 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same.
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.
TWI628331B (en) 2012-01-12 2018-07-01 Ｇｐ纖維股份有限公司 A low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same
PL2839071T3 (en) 2012-04-18 2019-05-31 Gp Cellulose Gmbh The use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products
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
CA2901665A1 (en) 2013-03-14 2014-09-18 Gp Cellulose Gmbh A method of making highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process
WO2014140940A2 (en) 2013-03-15 2014-09-18 Gp Cellulose Gmbh A low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same
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
CA3040734A1 (en) 2016-11-16 2018-05-24 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
ES2038097T5 (en) * 1989-06-06 2001-05-01 Eka Chemicals Ab PROCEDURE FOR WHITENING PAPER PASTES 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
ATE176808T1 (en) 1999-03-15
FI93232C (en) 1995-03-10
NO953444D0 (en) 1995-09-01
NO953444L (en) 1995-10-19
EP0884415B1 (en) 2002-11-20
WO1994020673A1 (en) 1994-09-15
DE69332508D1 (en) 2003-01-02
FI954093A0 (en) 1995-08-30
DE69332508T2 (en) 2003-07-03
EP0884415A1 (en) 1998-12-16
FI98223B (en) 1997-01-31
BR9307858A (en) 1996-02-27
EP0687321B1 (en) 1999-02-17
JP3276083B2 (en) 2002-04-22
FI930954A0 (en) 1993-03-03
FI930954A (en) 1994-09-04
ES2130260T3 (en) 1999-07-01
DE69323566T2 (en) 1999-07-15
ES2186948T3 (en) 2003-05-16
AU5370594A (en) 1994-09-26
CA2157109C (en) 2002-09-03
ATE228181T1 (en) 2002-12-15
FI93232B (en) 1994-11-30
CA2157109A1 (en) 1994-09-15
FI934036A0 (en) 1993-09-15
EP0687321A1 (en) 1995-12-20
PT884415E (en) 2003-03-31
RU2126471C1 (en) 1999-02-20
DE69323566D1 (en) 1999-03-25
JPH08509781A (en) 1996-10-15
FI934036A (en) 1994-09-04

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Legal Events

Date Code Title Description
GB Transfer or assigment of application

Owner name: AHLSTROM MACHINERY OY

MA Patent expired