NO20003014L - Oxygen end ligation of lignocellulosic material - Google Patents

Oxygen end ligation of lignocellulosic material

Info

Publication number
NO20003014L
NO20003014L NO20003014A NO20003014A NO20003014L NO 20003014 L NO20003014 L NO 20003014L NO 20003014 A NO20003014 A NO 20003014A NO 20003014 A NO20003014 A NO 20003014A NO 20003014 L NO20003014 L NO 20003014L
Authority
NO
Norway
Prior art keywords
pulp
oxygen
lignin
mixer
pulp fibers
Prior art date
Application number
NO20003014A
Other languages
Norwegian (no)
Other versions
NO20003014D0 (en
Inventor
Jorge Luiz Colodette
Ana Sabina De Campos Hen Brito
Original Assignee
Praxair Technology Inc
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 Praxair Technology Inc filed Critical Praxair Technology Inc
Publication of NO20003014D0 publication Critical patent/NO20003014D0/en
Publication of NO20003014L publication Critical patent/NO20003014L/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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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

Landscapes

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

Abstract

Oppfinnelsen konfigurerer en fremgangsmåte for å delignifisere masse hvori et trinn av et to-trinns oksygendelignifiseringsanlegg unngås. Spesielt muliggjør et masse- gjennombløtetrinn en massestrøm som skal blandes med en alkalitilsats og holdes i en tilstrekkelig tidsperiode for å tillate en alkalihydrolyse-utvasking av fargede materialer fra massen og en svelling av massefibrene. Deretter kombineres massestrømmen med en oksygentilsats og føres gjennom en blander. Produktet av blanderen overføres til en trykkreaktor hvor oksygen reagerer med lignin fra massefibrene. De svellede massefibrene forenkler oksygenreaksjonen med lignin og fjerning av ytterligere fargede materialer.The invention configures a method for delignifying pulp in which a step of a two-stage oxygen delignifier is avoided. In particular, a pulp soaking step enables a pulp stream to be mixed with an alkali additive and maintained for a sufficient period of time to allow an alkali hydrolysis leaching of colored materials from the pulp and a swelling of the pulp fibers. Then, the mass flow is combined with an oxygen additive and passed through a mixer. The product of the mixer is transferred to a pressure reactor where oxygen reacts with lignin from the pulp fibers. The swollen pulp fibers simplify the oxygen reaction with lignin and the removal of additional colored materials.

NO20003014A 1999-06-14 2000-06-13 Oxygen end ligation of lignocellulosic material NO20003014L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US33098399A 1999-06-14 1999-06-14

Publications (2)

Publication Number Publication Date
NO20003014D0 NO20003014D0 (en) 2000-06-13
NO20003014L true NO20003014L (en) 2000-12-15

Family

ID=23292141

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20003014A NO20003014L (en) 1999-06-14 2000-06-13 Oxygen end ligation of lignocellulosic material

Country Status (7)

Country Link
EP (1) EP1061173A1 (en)
JP (1) JP2001003287A (en)
KR (1) KR100538083B1 (en)
CN (1) CN1277283A (en)
BR (1) BR0002634A (en)
CA (1) CA2311718A1 (en)
NO (1) NO20003014L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2233926C1 (en) * 2003-06-30 2004-08-10 Алтайский государственный университет Raw plant material delignifying method
SE540043C2 (en) * 2015-11-27 2018-03-06 Valmet Oy Method and system for oxygen delignification of cellulose pulp
CN111344455B (en) 2017-09-11 2022-10-28 索理思科技公司 Method for enhancing oxygen delignification of chemical wood pulp
CN112342816B (en) * 2020-11-02 2022-08-09 天津科技大学 Protection technology for paper pulp in oxygen delignification
CN112778539A (en) * 2021-01-04 2021-05-11 中国林业科学研究院林产化学工业研究所 Method for preparing oxidized lignin with high carboxyl content from fiber raw material
SE546238C2 (en) * 2022-06-27 2024-07-23 Valmet Oy Method for processing cellulose pulp obtained from a kraft process
CN115417931B (en) * 2022-09-22 2024-03-22 上海同化益生纤生物科技有限公司 Preparation method and application of temperature-resistant cellulose

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806203A (en) * 1985-02-14 1989-02-21 Elton Edward F Method for alkaline delignification of lignocellulosic fibrous material at a consistency which is raised during reaction
US5085734A (en) * 1989-02-15 1992-02-04 Union Camp Patent Holding, Inc. Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
US5296292A (en) * 1990-09-04 1994-03-22 W. L. Gore & Associates, Inc. Elongated cylindrical tensile article
FI923585L (en) * 1991-08-14 1993-02-15 Union Camp Patent Holding ANVAENDNING AV EN TVAETTPRESS I EN ALKALITILLLSATSPROCESS FOER MASS
CN1203643A (en) * 1995-12-07 1998-12-30 贝洛特工艺技术公司 Oxygen delignification of medium consistency pulp slurry

Also Published As

Publication number Publication date
BR0002634A (en) 2001-01-02
JP2001003287A (en) 2001-01-09
KR20010049536A (en) 2001-06-15
KR100538083B1 (en) 2005-12-22
EP1061173A1 (en) 2000-12-20
CN1277283A (en) 2000-12-20
NO20003014D0 (en) 2000-06-13
CA2311718A1 (en) 2000-12-14

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Legal Events

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FC2A Withdrawal, rejection or dismissal of laid open patent application