NO20065354L - Process for making wood pulp - Google Patents

Process for making wood pulp

Info

Publication number
NO20065354L
NO20065354L NO20065354A NO20065354A NO20065354L NO 20065354 L NO20065354 L NO 20065354L NO 20065354 A NO20065354 A NO 20065354A NO 20065354 A NO20065354 A NO 20065354A NO 20065354 L NO20065354 L NO 20065354L
Authority
NO
Norway
Prior art keywords
pulp
wood pulp
lye
extraction step
recycled
Prior art date
Application number
NO20065354A
Other languages
Norwegian (no)
Other versions
NO338462B1 (en
Inventor
Herbert Sixta
Original Assignee
Chemiefaser Lenzing Ag
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 Chemiefaser Lenzing Ag filed Critical Chemiefaser Lenzing Ag
Publication of NO20065354L publication Critical patent/NO20065354L/en
Publication of NO338462B1 publication Critical patent/NO338462B1/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
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
    • 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
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Framgangsmåte for framstilling av tremasse ved å: - framskaffe en tremasse ved bruk av i og for seg kjente oppslemmingsprosesser - utføre minst ett alkalisk ekstraksjonstrinn der tremassen behandles med lut og deretter presses ut - valgfritt rense og/eller bleke tremassen, hvorved i det minste en del av luten, som akkumuleres i det alkaliske ekstraksjonstrinnet etter pressing, resirkuleres for behandling av tremassen. Innholdet av betacellulose reduseres i det minste i en del av den resirkulerte luten før ny behandling av tremassen finner sted.Process for preparing wood pulp by: - obtaining a pulp using known slurry processes known per se - performing at least one alkaline extraction step in which the pulp is treated with lye and then pressed out - optional cleaning and / or bleaching the pulp, at least one part of the lye, which accumulates in the alkaline extraction step after pressing, is recycled to treat the wood pulp. The content of beta cellulose is at least reduced in part of the recycled liquor before new treatment of the pulp takes place.

NO20065354A 2004-06-02 2006-11-24 Process for making wood pulp and using the same NO338462B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT9532004A AT413548B (en) 2004-06-02 2004-06-02 METHOD FOR PRODUCING A CHEMICAL FIBER AND ITS USE
PCT/AT2005/000171 WO2005118950A1 (en) 2004-06-02 2005-05-20 Method for producing a chemical conversion pulp

Publications (2)

Publication Number Publication Date
NO20065354L true NO20065354L (en) 2007-01-31
NO338462B1 NO338462B1 (en) 2016-08-22

Family

ID=34842282

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20065354A NO338462B1 (en) 2004-06-02 2006-11-24 Process for making wood pulp and using the same

Country Status (6)

Country Link
EP (1) EP1753908B1 (en)
AT (1) AT413548B (en)
CA (1) CA2568594C (en)
NO (1) NO338462B1 (en)
WO (1) WO2005118950A1 (en)
ZA (1) ZA200610044B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT503612A1 (en) * 2006-05-10 2007-11-15 Chemiefaser Lenzing Ag METHOD FOR PRODUCING A PULP
AT503610B1 (en) * 2006-05-10 2012-03-15 Chemiefaser Lenzing Ag METHOD FOR PRODUCING A PULP
AT503611B1 (en) * 2006-05-10 2009-05-15 Chemiefaser Lenzing Ag METHOD FOR PRODUCING A PULP
JP2015518248A (en) 2012-04-26 2015-06-25 レンツィング アクチェンゲゼルシャフト Battery separator
FI129086B (en) * 2012-09-14 2021-06-30 Teknologian Tutkimuskeskus Vtt Oy Method of producing dissolving pulp
JP2016511511A (en) * 2013-02-22 2016-04-14 レンツィング アクチェンゲゼルシャフト Battery separator
CN104611973A (en) * 2013-11-04 2015-05-13 新疆光大山河化工科技有限公司 Processing method of refined cotton black liquor
EP3347522B1 (en) * 2015-09-07 2020-06-17 Domsjö Fabriker AB Novel dissolving pulp
JP2017224611A (en) * 2017-07-06 2017-12-21 レンツィング アクチェンゲゼルシャフト Battery separator
SE1850733A1 (en) * 2018-06-15 2019-12-16 Valmet Oy Method and assembly for optimizing filtrate circulation in a kraft process
SE546238C2 (en) * 2022-06-27 2024-07-23 Valmet Ab Method for processing cellulose pulp obtained from a kraft process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI49438C (en) * 1973-07-23 1980-12-23 Keskuslaboratorio FOERFARANDE FOER AVLAEGSNANDE AV HEMICELLULOSA UR HEMICELLULOSAHALTIGA ALKALILOESNINGAR I PROCESSCIRKULATION
US4270914A (en) * 1979-10-26 1981-06-02 Borregaard Industries Limited Process for controlling hemicellulose concentration during the mercerization of cellulose
US5589053A (en) * 1995-11-03 1996-12-31 Huron Tech Incorporated Electrolysis process for removal of caustic in hemicellulose caustic
CA2241193A1 (en) * 1995-12-23 1997-07-03 Krebs & Co. Ag Process for purifying a liquid contaminated by filamentary molecules

Also Published As

Publication number Publication date
EP1753908B1 (en) 2016-02-03
CA2568594A1 (en) 2005-12-15
EP1753908A1 (en) 2007-02-21
NO338462B1 (en) 2016-08-22
CA2568594C (en) 2013-07-16
WO2005118950A1 (en) 2005-12-15
AT413548B (en) 2006-03-15
ZA200610044B (en) 2008-02-27
ATA9532004A (en) 2005-08-15

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