CO5611215A2 - PROCESS FOR WHITENING OF PULP OF NON-WOODEN MATERIALS CONTAINING LIGNOCELLULOSE - Google Patents

PROCESS FOR WHITENING OF PULP OF NON-WOODEN MATERIALS CONTAINING LIGNOCELLULOSE

Info

Publication number
CO5611215A2
CO5611215A2 CO04106973A CO04106973A CO5611215A2 CO 5611215 A2 CO5611215 A2 CO 5611215A2 CO 04106973 A CO04106973 A CO 04106973A CO 04106973 A CO04106973 A CO 04106973A CO 5611215 A2 CO5611215 A2 CO 5611215A2
Authority
CO
Colombia
Prior art keywords
pulp
process according
treatment
chelating agent
lignocellulose
Prior art date
Application number
CO04106973A
Other languages
Spanish (es)
Inventor
Jiri Basta
Thomas Christopher Greschik
Gerd Eva Wane
Original Assignee
Akzo Nobel Nv
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 Akzo Nobel Nv filed Critical Akzo Nobel Nv
Publication of CO5611215A2 publication Critical patent/CO5611215A2/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

1.- Un proceso para blanquear pulpa que contiene lignocelulosa que comprende pulpa obtenible de materiales que contienen lignocelulosa seleccionados del grupo que consiste de material no maderable con un compuesto que contiene peróxido, donde la pulpa antes del blanqueo es tratada con dióxido de cloro, caracterizada por que la pulpa después el tratamiento con dióxido de cloro es tratada en una etapa separada con un agente quelante a un pH hasta de aproximadamente 2,9 y lavada entre el tratamiento con dióxido de cloro y el tratamiento con agente quelante.2.- Un proceso de acuerdo a la reivindicación 1, caracterizado por que la pulpa que contiene lignocelulosa contiene al menos 500 ppm de sílice.3.- Un proceso de acuerdo a la reivindicación 1, caracterizado por que la pulpa es obtenible de materiales que contienen lignocelulosa seleccionados del grupo que consiste de trigo y junco mezclas de estos.4.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que el compuesto que contiene peróxido es peróxido de hidrógeno.5.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes caracterizado por que el pH en el tratamiento con agente quelante va desde aproximadamente 1,5 hasta aproximadamente 2,5.6.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que el agente quelante se selecciona del grupo que consiste de compuestos orgánicos nitrogenados.7.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que la pulpa se lava después del tratamiento con un agente quelante.8.- Un proceso de acuerdo a cualquiera de las reivindicaciones precedentes, caracterizado por que la pulpa después del blanqueo con el compuesto que contiene peróxido es adicionalmente blanqueada en una o más etapas hasta un brillo de al menos aproximadamente 85% ISO.1. A process for bleaching pulp containing lignocellulose comprising pulp obtainable from materials containing lignocellulose selected from the group consisting of non-timber material with a peroxide-containing compound, where the pulp before bleaching is treated with chlorine dioxide, characterized because the pulp after treatment with chlorine dioxide is treated in a separate stage with a chelating agent at a pH of up to about 2.9 and washed between the treatment with chlorine dioxide and the treatment with chelating agent.2.- A process according to claim 1, characterized in that the pulp containing lignocellulose contains at least 500 ppm of silica.3.- A process according to claim 1, characterized in that the pulp is obtainable from lignocellulose containing materials selected from the group consisting of wheat and reed mixtures of these. 4. A process according to any of the preceding claims, characterize It is curved that the peroxide-containing compound is hydrogen peroxide. 5. A process according to any of the preceding claims characterized in that the pH in the treatment with chelating agent ranges from about 1.5 to about 2.5.6.- A process according to any of the preceding claims, characterized in that the chelating agent is selected from the group consisting of nitrogenous organic compounds.7.- A process according to any of the preceding claims, characterized in that the pulp is then washed of the treatment with a chelating agent. 8. A process according to any of the preceding claims, characterized in that the pulp after bleaching with the peroxide-containing compound is further bleached in one or more stages to a brightness of at least about 85% ISO

CO04106973A 2002-03-28 2004-10-25 PROCESS FOR WHITENING OF PULP OF NON-WOODEN MATERIALS CONTAINING LIGNOCELLULOSE CO5611215A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0200981A SE0200981D0 (en) 2002-03-28 2002-03-28 Process for bleaching lignocellulose-containing non-wood pulp
PCT/SE2003/000512 WO2003083208A1 (en) 2002-03-28 2003-03-27 Process for bleaching lignocellulose-containing non-wood pulp

Publications (1)

Publication Number Publication Date
CO5611215A2 true CO5611215A2 (en) 2006-02-28

Family

ID=20287449

Family Applications (1)

Application Number Title Priority Date Filing Date
CO04106973A CO5611215A2 (en) 2002-03-28 2004-10-25 PROCESS FOR WHITENING OF PULP OF NON-WOODEN MATERIALS CONTAINING LIGNOCELLULOSE

Country Status (5)

Country Link
CN (1) CN1312354C (en)
AU (1) AU2003216028B2 (en)
CO (1) CO5611215A2 (en)
SE (1) SE0200981D0 (en)
WO (1) WO2003083208A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050051288A1 (en) * 2003-09-09 2005-03-10 Caifang Yin Extended retention and medium consistency pulp treatment
FI123102B (en) * 2006-03-31 2012-11-15 Laennen Tutkimus Western Res Inc Oy Chemical pulp bleaching process
FI122626B (en) * 2006-03-31 2012-04-30 Laennen Tutkimus Western Res Inc Oy Chemical pulp bleaching process
JP4967451B2 (en) 2006-05-17 2012-07-04 三菱瓦斯化学株式会社 Method for producing bleached pulp
CN101451312B (en) * 2007-12-05 2012-05-02 山东福荫造纸环保科技有限公司 Method for preparing bleached chemical pulp by using grass type plants as raw materials
CN101451313B (en) * 2007-12-05 2012-01-25 山东福荫造纸环保科技有限公司 Method for preparing bleached chemical pulp by using grass type plants as raw materials
CN101812812B (en) * 2009-02-25 2012-08-08 山东福荫造纸环保科技有限公司 Elemental chlorine free bleaching method for plant fiber stuff
CN104179056A (en) * 2013-05-23 2014-12-03 中国制浆造纸研究院 Wheat straw pulp elemental-chlorine-free bleaching wastewater recycling method
CN104928964B (en) * 2014-03-18 2017-02-15 中国科学院大连化学物理研究所 Method for reducing generation of dioxins in non-wood pulp papermaking chlorine bleaching process
KR101806632B1 (en) * 2015-12-04 2018-01-11 현대자동차주식회사 Wet paper friction material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69420306T2 (en) * 1993-04-20 2000-04-20 Eka Chemicals Ab Bohus Process for bleaching lignocellulosic pulp
SE502706E (en) * 1994-04-05 1999-06-18 Mo Och Domsjoe Ab Preparation of bleached cellulose pulp by bleaching with chlorine dioxide and treatment of complexing agents in the same step
SE514697C2 (en) * 1994-08-31 2001-04-02 Valmet Fibertech Ab Elimination of metal ions in pulp bleaching
SE507742C2 (en) * 1996-11-08 1998-07-06 Sunds Defibrator Ind Ab Bleaching of pulp with chlorine dioxide, alkali and complexing agents without intermediate washes
US6302997B1 (en) * 1999-08-30 2001-10-16 North Carolina State University Process for producing a pulp suitable for papermaking from nonwood fibrous materials

Also Published As

Publication number Publication date
AU2003216028B2 (en) 2006-03-16
CN1312354C (en) 2007-04-25
AU2003216028A1 (en) 2003-10-13
SE0200981D0 (en) 2002-03-28
CN1643209A (en) 2005-07-20
WO2003083208A1 (en) 2003-10-09

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