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NO970907L - Bleking av masse - Google Patents

Bleking av masse

Info

Publication number
NO970907L
NO970907L NO970907A NO970907A NO970907L NO 970907 L NO970907 L NO 970907L NO 970907 A NO970907 A NO 970907A NO 970907 A NO970907 A NO 970907A NO 970907 L NO970907 L NO 970907L
Authority
NO
Norway
Prior art keywords
pulp
bleaching
hydrogen peroxide
chlorine dioxide
bleached
Prior art date
Application number
NO970907A
Other languages
English (en)
Other versions
NO970907D0 (no
Inventor
Maarten Dahl
Original Assignee
Sunds Defibrator Ind 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20395066&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NO970907(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of NO970907L publication Critical patent/NO970907L/no
Publication of NO970907D0 publication Critical patent/NO970907D0/no

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
    • D21C9/12—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
    • D21C9/16—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)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Detergent Compositions (AREA)
  • Semiconductor Lasers (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Medicinal Preparation (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)

Abstract

Bleking av kjemisk masse i flere trinn omfatter slutt- bleking med hhv. klordioksyd og hydrogenperoksyd. Massen behandles i direkte tilslutning til klordioksydtrinnet (3), uten mellomliggende vasking, med chelateringsmiddel (2) for eliminering av metallioner, fortrinnsvis mangan. Massen vaskes deretter (4) og blekes med hydrogenperoksyd (5).
NO970907A 1994-08-31 1997-02-27 Bleking av masse NO970907D0 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9402885A SE514697C2 (sv) 1994-08-31 1994-08-31 Eliminering av metalljoner vid blekning av massa
PCT/SE1995/000920 WO1996006976A1 (en) 1994-08-31 1995-08-11 Pulp bleaching

Publications (2)

Publication Number Publication Date
NO970907L true NO970907L (no) 1997-02-27
NO970907D0 NO970907D0 (no) 1997-02-27

Family

ID=20395066

Family Applications (1)

Application Number Title Priority Date Filing Date
NO970907A NO970907D0 (no) 1994-08-31 1997-02-27 Bleking av masse

Country Status (17)

Country Link
US (1) US6540872B1 (no)
EP (1) EP0778909B1 (no)
JP (1) JPH10505639A (no)
CN (1) CN1065578C (no)
AT (1) ATE226658T1 (no)
AU (1) AU687626B2 (no)
BR (1) BR9508653A (no)
CA (1) CA2197771A1 (no)
DE (1) DE69528660T2 (no)
ES (1) ES2185715T3 (no)
FI (1) FI970821L (no)
NO (1) NO970907D0 (no)
NZ (1) NZ292288A (no)
PT (1) PT778909E (no)
SE (1) SE514697C2 (no)
WO (1) WO1996006976A1 (no)
ZA (1) ZA957070B (no)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6375797B1 (en) * 1996-06-20 2002-04-23 Andritz-Ahlstrom Oy Bleaching chemical pulp in a PkDQ-Po Sequence
SE507742C2 (sv) * 1996-11-08 1998-07-06 Sunds Defibrator Ind Ab Förblekningsbehandling av pappersmassa med klordioxid, alkali och komplexbildare utan mellanliggande tvättar
SE0200981D0 (sv) * 2002-03-28 2002-03-28 Eka Chemicals Ab Process for bleaching lignocellulose-containing non-wood pulp
JP4513959B2 (ja) * 2004-09-17 2010-07-28 三菱瓦斯化学株式会社 製紙用化学パルプの半晒漂白方法
FI123102B (fi) * 2006-03-31 2012-11-15 Laennen Tutkimus Western Res Inc Oy Kemiallisen massan valkaisumenetelmä
EP2787120B1 (en) 2008-06-20 2024-10-16 Global Holdings II, Inc. Recording sheet with improved optical properties
CN101812812B (zh) * 2009-02-25 2012-08-08 山东福荫造纸环保科技有限公司 一种植物纤维浆料无元素氯的漂白方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1100709A (en) * 1965-06-25 1968-01-24 Pulp Paper Res Inst Two-stage purification of fibrous cellulose material
DE2219504C2 (de) 1972-04-21 1974-10-03 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz
DE402335T1 (de) * 1989-06-06 1992-04-09 Eka Nobel Ab, Surte Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen.
US5091054A (en) 1989-08-18 1992-02-25 Degussa Corporation Process for bleaching and delignification of lignocellulosic
SE9000340L (sv) * 1990-01-31 1991-08-01 Eka Nobel Ab Foerfarande vid blekning av lignocellulosahaltigt material
SE469842C (sv) * 1992-01-21 1996-01-15 Sunds Defibrator Ind Ab Blekning av kemisk massa med peroxid
SE9301960L (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
SE502706E (sv) * 1994-04-05 1999-09-27 Mo Och Domsjoe Ab Framställnng av blekt cellulosamassa genom blekning med klordioxid och behandling av komplexbildare i samma steg

Also Published As

Publication number Publication date
CN1157644A (zh) 1997-08-20
JPH10505639A (ja) 1998-06-02
FI970821A7 (fi) 1997-02-27
CN1065578C (zh) 2001-05-09
ES2185715T3 (es) 2003-05-01
SE514697C2 (sv) 2001-04-02
SE9402885D0 (sv) 1994-08-31
EP0778909B1 (en) 2002-10-23
SE9402885L (sv) 1996-03-01
PT778909E (pt) 2003-01-31
CA2197771A1 (en) 1996-03-07
FI970821A0 (fi) 1997-02-27
DE69528660D1 (de) 2002-11-28
FI970821L (fi) 1997-02-27
AU3401795A (en) 1996-03-22
AU687626B2 (en) 1998-02-26
WO1996006976A1 (en) 1996-03-07
DE69528660T2 (de) 2003-06-26
EP0778909A1 (en) 1997-06-18
ATE226658T1 (de) 2002-11-15
NO970907D0 (no) 1997-02-27
BR9508653A (pt) 1997-11-11
NZ292288A (en) 1997-11-24
US6540872B1 (en) 2003-04-01
ZA957070B (en) 1996-04-15

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application