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

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 FI944348A (en) 1994-09-19 1994-09-19 Procedure for bleaching of 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) FI944348A (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
US20030029589A1 (en) * 1998-06-17 2003-02-13 Nile Fiber Pulp & Paper, Inc. Total chlorine free bleaching of Arundo donax pulp
AU4685499A (en) 1998-06-17 2000-01-05 Alex-Alt Biomass, Inc. Arundo donax pulp, paper products, and particle board
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
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
US9512237B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Method for inhibiting the growth of microbes with a modified cellulose fiber
ES2752755T3 (en) 2009-05-28 2020-04-06 Gp Cellulose Gmbh Kraft chemical fiber modified cellulose and methods of production and use thereof
PL2714987T3 (en) 2011-05-23 2015-12-31 Gp Cellulose Gmbh Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same
AU2013207797B2 (en) 2012-01-12 2017-05-25 Gp Cellulose Gmbh A low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same
MX364847B (en) 2012-04-18 2019-05-08 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.
KR102180512B1 (en) 2013-02-08 2020-11-19 게페 첼루로제 게엠베하 Softwood kraft fiber having an improved a-cellulose content and its use in the production of chemical cellulose products
KR102330233B1 (en) 2013-03-14 2021-11-23 게페 첼루로제 게엠베하 A method of making a highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process
CA2901915A1 (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
EP3541849B1 (en) 2016-11-16 2023-11-15 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
CA2200327A1 (en) 1996-03-28
FI944348A (en) 1996-03-20
SE9700992D0 (en) 1997-03-18
FI944348A0 (en) 1994-09-19
WO1996009434A1 (en) 1996-03-28

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Legal Events

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