EP3405611A4 - Chlorine dioxide stage for controlling viscosity in dissolving pulps - Google Patents

Chlorine dioxide stage for controlling viscosity in dissolving pulps Download PDF

Info

Publication number
EP3405611A4
EP3405611A4 EP16886677.0A EP16886677A EP3405611A4 EP 3405611 A4 EP3405611 A4 EP 3405611A4 EP 16886677 A EP16886677 A EP 16886677A EP 3405611 A4 EP3405611 A4 EP 3405611A4
Authority
EP
European Patent Office
Prior art keywords
chlorine dioxide
controlling viscosity
dioxide stage
dissolving pulps
pulps
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP16886677.0A
Other languages
German (de)
French (fr)
Other versions
EP3405611A1 (en
Inventor
Maria WENNERSTRÖM
Solveig NORDÉN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet Technologies Oy
Valmet AB
Original Assignee
Valmet Oy
Valmet AB
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 Valmet Oy, Valmet AB filed Critical Valmet Oy
Publication of EP3405611A1 publication Critical patent/EP3405611A1/en
Publication of EP3405611A4 publication Critical patent/EP3405611A4/en
Withdrawn legal-status Critical Current

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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting 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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
EP16886677.0A 2016-01-18 2016-12-13 Chlorine dioxide stage for controlling viscosity in dissolving pulps Withdrawn EP3405611A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1650050A SE1650050A1 (en) 2016-01-18 2016-01-18 Chlorine dioxide stage for controlling viscosity in dissolving pulps
PCT/SE2016/051253 WO2017127004A1 (en) 2016-01-18 2016-12-13 Chlorine dioxide stage for controlling viscosity in dissolving pulps

Publications (2)

Publication Number Publication Date
EP3405611A1 EP3405611A1 (en) 2018-11-28
EP3405611A4 true EP3405611A4 (en) 2019-09-25

Family

ID=58556464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16886677.0A Withdrawn EP3405611A4 (en) 2016-01-18 2016-12-13 Chlorine dioxide stage for controlling viscosity in dissolving pulps

Country Status (3)

Country Link
EP (1) EP3405611A4 (en)
SE (1) SE1650050A1 (en)
WO (1) WO2017127004A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3755839B1 (en) 2018-02-23 2024-08-21 GP Cellulose GmbH Novel dissolving wood pulps and methods of making and using the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991011554A1 (en) * 1990-01-31 1991-08-08 Eka Nobel Ab Process for bleaching of ligno-cellulosic material
US6048437A (en) * 1995-09-22 2000-04-11 Mitsubishi Gas Chemical Company, Inc. Process for bleaching chemical pulp with chlorine dioxide, peroxide and Na2 M0 O4 as reaction catalyt
WO2001088236A2 (en) * 2000-05-18 2001-11-22 Weyerhaeuser Company Alkaline pulp having low average degree of polymerization values and method of producing the same
CN103122594B (en) * 2012-11-19 2014-03-12 山东轻工业学院 Production method of dissolving pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE532470C2 (en) * 2008-05-13 2010-02-02 Metso Paper Inc Final bleaching of oxygen delignified pulp with ozone, chlorine dioxide and peroxide
JP5953909B2 (en) * 2012-04-27 2016-07-20 王子ホールディングス株式会社 Method for producing dissolving pulp
SE538064C2 (en) * 2014-06-17 2016-02-23 Valmet Oy Method of producing dissolving pulp from lignocellulosic materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991011554A1 (en) * 1990-01-31 1991-08-08 Eka Nobel Ab Process for bleaching of ligno-cellulosic material
US6048437A (en) * 1995-09-22 2000-04-11 Mitsubishi Gas Chemical Company, Inc. Process for bleaching chemical pulp with chlorine dioxide, peroxide and Na2 M0 O4 as reaction catalyt
WO2001088236A2 (en) * 2000-05-18 2001-11-22 Weyerhaeuser Company Alkaline pulp having low average degree of polymerization values and method of producing the same
CN103122594B (en) * 2012-11-19 2014-03-12 山东轻工业学院 Production method of dissolving pulp

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
EI-BARBARY M HASSAN: "Oxygen-peroxide (Eop) Delignification and Peroxide (P) Bleaching of Bagasse Kraft Pulp", JOURNAL OF SCIENTIFIC AND INDUSTRIAL RESEARCH, vol. 62, no. 07, 1 July 2003 (2003-07-01), India, pages 699 - 706, XP055245121, ISSN: 0022-4456 *
O KORDSACHIA ET AL: "PRODUCTION OF SPRUCE DISSOLVING PULP WITH THE PREHYDROLYSIS-ALKALINE SULFITE PROCESS (PH-ASA)", LENZINGER BERICHTE, vol. 83, 1 January 2004 (2004-01-01), pages 24 - 34, XP055245119 *
See also references of WO2017127004A1 *

Also Published As

Publication number Publication date
EP3405611A1 (en) 2018-11-28
SE539163C2 (en) 2017-04-25
SE1650050A1 (en) 2017-04-25
WO2017127004A1 (en) 2017-07-27

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