FI902052A0 - Happivalkaisu, jossa tehdään pesu vaiheiden välissä - Google Patents

Happivalkaisu, jossa tehdään pesu vaiheiden välissä

Info

Publication number
FI902052A0
FI902052A0 FI902052A FI902052A FI902052A0 FI 902052 A0 FI902052 A0 FI 902052A0 FI 902052 A FI902052 A FI 902052A FI 902052 A FI902052 A FI 902052A FI 902052 A0 FI902052 A0 FI 902052A0
Authority
FI
Finland
Prior art keywords
washing
steps
oxygen bleaching
bleaching
oxygen
Prior art date
Application number
FI902052A
Other languages
English (en)
Swedish (sv)
Other versions
FI99151B (fi
Inventor
J Robert Prough
Original Assignee
Kamyr Inc
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 Kamyr Inc filed Critical Kamyr Inc
Publication of FI902052A0 publication Critical patent/FI902052A0/fi
Application granted granted Critical
Publication of FI99151B publication Critical patent/FI99151B/fi

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
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
FI902052A 1989-04-25 1990-04-24 Happivalkaisu, jossa tehdään pesu vaiheiden välissä FI99151B (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/342,937 US4946556A (en) 1989-04-25 1989-04-25 Method of oxygen delignifying wood pulp with between stage washing

Publications (2)

Publication Number Publication Date
FI902052A0 true FI902052A0 (fi) 1990-04-24
FI99151B FI99151B (fi) 1997-06-30

Family

ID=23343936

Family Applications (1)

Application Number Title Priority Date Filing Date
FI902052A FI99151B (fi) 1989-04-25 1990-04-24 Happivalkaisu, jossa tehdään pesu vaiheiden välissä

Country Status (6)

Country Link
US (1) US4946556A (fi)
JP (1) JP2565579B2 (fi)
CA (1) CA1340118C (fi)
FI (1) FI99151B (fi)
FR (1) FR2646446B1 (fi)
SE (1) SE503759C2 (fi)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE97179T1 (de) * 1989-06-06 1993-11-15 Eka Nobel Ab Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen.
SE9001481L (sv) * 1990-04-23 1991-10-24 Eka Nobel Ab Reduktion av halogenorganiska foereningar i blekeriavlopp
SE466061B (sv) * 1990-04-23 1991-12-09 Eka Nobel Ab Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne
US5328564A (en) * 1990-09-17 1994-07-12 Kamyr, Inc. Modified digestion of paper pulp followed by ozone bleaching
US5938892A (en) * 1991-01-28 1999-08-17 Champion International Corporation Process for recycling bleach plant filtrate
US5853535A (en) * 1991-01-28 1998-12-29 Champion International Corporation Process for manufacturing bleached pulp including recycling
US5352332A (en) * 1991-01-28 1994-10-04 Maples Gerald E Process for recycling bleach plant filtrate
US5785810A (en) * 1991-08-21 1998-07-28 Salminen; Reijo K. Wood pulp processing apparatus and method
US5223091A (en) * 1991-11-25 1993-06-29 Macmillan Bloedel Limited Method of brightening mechanical pulp using silicate-free peroxide bleaching
US5302244A (en) * 1992-02-18 1994-04-12 Domtar Inc. Oxygen delignification of waste cellulosic paper products
US5360514A (en) * 1992-02-21 1994-11-01 Kamyr, Inc. Treatment of bleach plant filtrations using a magnesium filter
BE1006056A3 (fr) * 1992-07-06 1994-05-03 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
WO1994010375A1 (en) * 1992-10-26 1994-05-11 Kamyr, Inc. Displacement chelate treatment of pulp
US5503709A (en) * 1994-07-27 1996-04-02 Burton; Steven W. Environmentally improved process for preparing recycled lignocellulosic materials for bleaching
US6514380B1 (en) * 1995-03-08 2003-02-04 Andritz Oy Treatment of chemical pulp
SE505141C2 (sv) * 1995-10-23 1997-06-30 Sunds Defibrator Ind Ab Syrgasdelignifiering av massa i två steg med hög satsning av alkali och syrgas och temperatur under 90 C i första steget
US6319357B1 (en) 1995-10-23 2001-11-20 Valmet Fibertech Aktiebolag Method for two-stage oxygen bleaching and delignification of chemical pulp
WO1997027358A2 (en) * 1995-12-07 1997-07-31 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
US6706143B1 (en) * 1996-03-19 2004-03-16 International Paper Company Minimizing chlorinated organics in pulp bleaching processes
US6475338B1 (en) * 1996-06-05 2002-11-05 Andritz Inc. Method of minimizing transition metal ions during chemical pulping in a digester by adding chelating agent to the digester
SE510740C2 (sv) * 1996-11-26 1999-06-21 Sunds Defibrator Ind Ab Styrning av syrgasdelignifiering
US6942754B2 (en) 1999-03-23 2005-09-13 Oji Paper Co., Ltd. Process for producing xylooligosaccharide from lignocellulose pulp
US6824646B2 (en) * 1999-03-23 2004-11-30 Oji Paper Co., Ltd. Process for oxygen bleaching and enzyme treating lignocellulosic pulp with liquid treatment and recovery
WO2002099184A2 (en) * 2001-06-06 2002-12-12 Solutia Inc. Method and aqueous composition for the production of improved pulp
JP4595285B2 (ja) * 2003-02-28 2010-12-08 日本製紙株式会社 未晒クラフトパルプ処理方法および高白色度漂白パルプ製造方法
US20050087315A1 (en) * 2003-10-28 2005-04-28 Donovan Joseph R. Low consistency oxygen delignification process
JP2007310239A (ja) * 2006-05-19 2007-11-29 Sony Corp 映像表示装置
US20080110584A1 (en) * 2006-11-15 2008-05-15 Caifang Yin Bleaching process with at least one extraction stage
JP4973284B2 (ja) * 2007-03-30 2012-07-11 栗田工業株式会社 パルプ洗浄剤、パルプ製造方法、及びパルプ洗浄方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505529A (en) * 1974-06-14 1978-03-30 Mo Och Domsjoe Ab Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the method
US4259150A (en) * 1978-12-18 1981-03-31 Kamyr Inc. Plural stage mixing and thickening oxygen bleaching process
US4295927A (en) * 1979-06-15 1981-10-20 Weyerhaeuser Company Method and apparatus for treating pulp with oxygen and storing the treated pulp
JPS564791A (en) * 1979-06-18 1981-01-19 Kogyo Gijutsuin Bleaching of mechanical pulp
EP0088073A4 (en) * 1981-09-04 1984-01-09 Weyerhaeuser Co METHOD FOR TREATING PULP WITH MULTIPLE OXYGEN LEVELS.
US4806203A (en) * 1985-02-14 1989-02-21 Elton Edward F Method for alkaline delignification of lignocellulosic fibrous material at a consistency which is raised during reaction
US4798652A (en) * 1987-10-19 1989-01-17 Peter Joyce Peroxide bleaching of mechanical pulps

Also Published As

Publication number Publication date
JP2565579B2 (ja) 1996-12-18
SE9001187D0 (sv) 1990-04-02
CA1340118C (en) 1998-11-10
SE503759C2 (sv) 1996-08-26
SE9001187L (sv) 1990-10-26
JPH0314686A (ja) 1991-01-23
FI99151B (fi) 1997-06-30
FR2646446A1 (fr) 1990-11-02
US4946556A (en) 1990-08-07
FR2646446B1 (fr) 1996-06-14

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Legal Events

Date Code Title Description
BB Publication of examined application
FC Application refused

Owner name: ANDRITZ INC.