SE9700992L - Procedure for bleaching of pulp - Google Patents

Procedure for bleaching of pulp

Info

Publication number
SE9700992L
SE9700992L SE9700992A SE9700992A SE9700992L SE 9700992 L SE9700992 L SE 9700992L SE 9700992 A SE9700992 A SE 9700992A SE 9700992 A SE9700992 A SE 9700992A SE 9700992 L SE9700992 L SE 9700992L
Authority
SE
Sweden
Prior art keywords
pulp
bleaching
stage
procedure
oxygen
Prior art date
Application number
SE9700992A
Other languages
Swedish (sv)
Other versions
SE9700992D0 (en
Inventor
Kaj Henricson
Olavi Pikka
Original Assignee
Ahlstrom Machinery 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
Application filed by Ahlstrom Machinery Oy filed Critical Ahlstrom Machinery Oy
Publication of SE9700992D0 publication Critical patent/SE9700992D0/en
Publication of SE9700992L publication Critical patent/SE9700992L/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • 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
    • D21C9/16—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)

Abstract

The present invention relates to a method of bleaching sulfate cellulose pulp to a brightness of at least ISO 85 by using at least two of the following bleaching chemicals: oxygen, ozone, and peroxide. Characteristic features of the invention are that the pulp is digested; subjected to a heavy metals removal treatment with at least one of the following treatment agents or methods: acidification, EDTA, and DTPA; delignified in a pressurized two-step oxygen stage; and bleached at least in one acid peroxide stage.
SE9700992A 1994-09-19 1997-03-18 Procedure for bleaching of pulp SE9700992L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI944348A FI944348A7 (en) 1994-09-19 1994-09-19 Method for bleaching kraft pulp
PCT/FI1995/000506 WO1996009434A1 (en) 1994-09-19 1995-09-18 Method of bleaching kraft pulp

Publications (2)

Publication Number Publication Date
SE9700992D0 SE9700992D0 (en) 1997-03-18
SE9700992L true SE9700992L (en) 1997-05-16

Family

ID=8541400

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9700992A SE9700992L (en) 1994-09-19 1997-03-18 Procedure for bleaching of pulp

Country Status (4)

Country Link
CA (1) CA2200327C (en)
FI (1) FI944348A7 (en)
SE (1) SE9700992L (en)
WO (1) WO1996009434A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100417500C (en) 1998-06-17 2008-09-10 尼勒纤维纸浆和纸公司 Arundis pulp, paper products, and particle board
US20030029589A1 (en) * 1998-06-17 2003-02-13 Nile Fiber Pulp & Paper, Inc. Total chlorine free bleaching of Arundo donax pulp
US9511167B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
WO2010138941A2 (en) 2009-05-28 2010-12-02 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512563B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Surface treated modified cellulose from chemical kraft fiber and methods of making and using same
US9512237B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Method for inhibiting the growth of microbes with a modified cellulose fiber
JP6254078B2 (en) 2011-05-23 2017-12-27 ゲーペー ツェルローゼ ゲーエムベーハー Conifer craft fibers with improved whiteness and brightness, and methods of making and using the same
BR112014017164A8 (en) 2012-01-12 2017-07-04 Gp Cellulose Gmbh method for producing oxidized kraft pulp and softwood kraft fibers
EP3495550A1 (en) 2012-04-18 2019-06-12 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
PL2954115T3 (en) 2013-02-08 2022-05-02 Gp Cellulose Gmbh Softwood kraft fiber having an improved a-cellulose content and its use in the production of chemical cellulose products
US10138598B2 (en) 2013-03-14 2018-11-27 Gp Cellulose Gmbh Method of making a highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process
BR112015020000A2 (en) 2013-03-15 2017-07-18 Gp Cellulose Gmbh chemically modified kraft fiber and manufacturing methods
CA3040734A1 (en) 2016-11-16 2018-05-24 Gp Cellulose Gmbh Modified cellulose from chemical fiber and methods of making and using the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (en) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
US4427490A (en) * 1978-04-07 1984-01-24 International Paper Company Delignification and bleaching process for lignocellulosic pulp with peroxide in the presence of metal additives
DE3428352A1 (en) * 1984-08-01 1986-02-13 Degussa Ag, 6000 Frankfurt METHOD FOR DELIGNIFICATION AND BLEACHING OF CELLULAS
FR2655668B1 (en) * 1989-12-11 1995-06-09 Du Pin Cellulose PROCESS FOR BLEACHING CHEMICAL CELLULOSIC PASTA.

Also Published As

Publication number Publication date
CA2200327C (en) 2002-03-19
SE9700992D0 (en) 1997-03-18
FI944348L (en) 1996-03-20
FI944348A0 (en) 1994-09-19
FI944348A7 (en) 1996-03-20
CA2200327A1 (en) 1996-03-28
WO1996009434A1 (en) 1996-03-28

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Legal Events

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