EP0513140B1 - Procede de blanchiment de pulpe chimique - Google Patents

Procede de blanchiment de pulpe chimique Download PDF

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Publication number
EP0513140B1
EP0513140B1 EP91903684A EP91903684A EP0513140B1 EP 0513140 B1 EP0513140 B1 EP 0513140B1 EP 91903684 A EP91903684 A EP 91903684A EP 91903684 A EP91903684 A EP 91903684A EP 0513140 B1 EP0513140 B1 EP 0513140B1
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EP
European Patent Office
Prior art keywords
pulp
enzyme
steps
bleaching
treatment
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.)
Expired - Lifetime
Application number
EP91903684A
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German (de)
English (en)
Other versions
EP0513140A1 (fr
EP0513140B2 (fr
Inventor
Marja Vaheri
Kimmo Ruohoniemi
Hannu Sonni
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.)
Stora Enso Oyj
Original Assignee
Enso Gutzeit Oy
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Publication date
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Application filed by Enso Gutzeit Oy filed Critical Enso Gutzeit Oy
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Publication of EP0513140B2 publication Critical patent/EP0513140B2/fr
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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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively
    • 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
    • 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

Definitions

  • the chemical pulp obtained by sulfate cooking is brown in color, which is mainly due to lignin remaining in the pulp.
  • Lignin is removed by bleaching, which is usually a multiple-step process in which the pulp is treated alternately with oxidizing chemicals which decompose lignin and with chemicals which dissolve the substances produced as products of the decomposition.
  • oxidizing chemicals have been chorine-containing substances and oxygen, whereas alkali solutions have been used as chemicals removing the decomposition products.
  • the object of the present invention is to provide a new method, based on enzyme treatment of pulp, by which pulp can be bleached in such a manner that the need for bleaching chemicals decreases and at the same time the chemical oxygen consumption and toxicity of the bleaching effluent decrease so that the need for water purification will be smaller. It is characteristic of the invention that the pulp is treated with an enzyme in two or more steps of the bleaching process, wherein the pulp subsequent to each enzyme treatment step is treated in an oxidation step.
  • the pulp was subjected to an oxidizing bleaching treatment by using a mixture which contained 50 % chlorine dioxide and 50 % chlorine gas.
  • the mixture was proportioned at 2.0 x the kappa number after the pulping.
  • the treatment temperature was 40 ° C and the treatment time 45 min and the consistency of the pulp 3.5 %.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Paper (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Claims (9)

1. Un procédé pour le blanchiment de pulpe chimique, procédé comprenant au minimum une phase d'oxydation et au minimum une phase de traitement alcalin et dans lequel la pulpe est traitée avec un enzyme, caractérisé en ce que la pulpe est traitée avec un enzyme en deux ou plusieurs phases du procédé de blanchiment, dans lequel la pulpe postérieurement à chaque phase de traitement enzymatique est traitée par une phase d'oxydation.
2. Un procédé suivant la revendication 1, caractérisé en ce que le procédé comprend 2 à 4 phases de traitement enzymatique séparées.
3. Un procédé suivant la revendication 2, caractérisé en ce que le procédé comprend trois phases de traitement enzymatique séparées.
4. Un procédé suivant l'une quelconque des revendications précédentes, caractérisé en ce que le produit chimique oxydant utilisé dans une ou plusieurs phases du procédé est l'oxygène.
5. Un procédé suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une phase de traitement enzymatique est suivie dans le procédé par un traitement alcalin dans lequel un produit chimique oxydant, tel que de l'oxygène ou du peroxyde, est utilisé en supplément à l'alcali.
6. Un procédé suivant les revendications 3 à 5, caractérisé en ce que la première phase du procédé est un traitement enzymatique et les phases suivantes sont une oxydation avec l'oxygène, un second traitement enzymatique, un traitement alcalin dans lequel de l'oxygène ou du peroxyde est utilisé en addition à l'alcali, un troisième traitement enzymatique, une oxydation avec l'oxygène ou du dioxyde de chlore, un traitement alcalin, et une oxydation avec l'oxygène ou le dioxyde de chlore, les phases se suivant l'une après l'autre dans ladite séquence.
7. Un procédé suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'enzyme utilisé est l'hémicellulase, la cellulase, la pectinase, l'esterase, la ligninase, et/ou l'oxydase de phénol.
8. Un procédé suivant l'une quelconque des revendications précédentes, caractérisé en ce que le procédé comprend au minimum deux phases de traitement enzymatique séparées, dans lesquelles au minimum deux enzymes différents sont utilisés.
9. Un procédé suivant l'une quelconque des revendications précédentes, caractérisé en ce que le procédé est utilisé pour blanchir une pulpe obtenue à partir de bois résineux, telle que la pulpe de sulfate de pin.
EP91903684A 1990-02-02 1991-02-01 Procede de blanchiment de pulpe chimique Expired - Lifetime EP0513140B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI900549A FI89814C (fi) 1990-02-02 1990-02-02 Foerfarande foer blekning av cellulosamassa
FI900549 1990-02-02
PCT/FI1991/000033 WO1991011553A1 (fr) 1990-02-02 1991-02-01 Procede de blanchiment de pulpe chimique

Publications (3)

Publication Number Publication Date
EP0513140A1 EP0513140A1 (fr) 1992-11-19
EP0513140B1 true EP0513140B1 (fr) 1995-09-27
EP0513140B2 EP0513140B2 (fr) 1998-03-18

Family

ID=8529828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91903684A Expired - Lifetime EP0513140B2 (fr) 1990-02-02 1991-02-01 Procede de blanchiment de pulpe chimique

Country Status (8)

Country Link
EP (1) EP0513140B2 (fr)
JP (1) JPH05509362A (fr)
AT (1) ATE128498T1 (fr)
CA (1) CA2075187A1 (fr)
DE (1) DE69113444D1 (fr)
ES (1) ES2079062T5 (fr)
FI (1) FI89814C (fr)
WO (1) WO1991011553A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI90670C (sv) * 1991-05-02 1994-03-10 Metsae Serla Oy Behandling av alkalibehandlad massa för användning i pappersframställning
US7816129B2 (en) 1994-07-29 2010-10-19 Ab Enzymes Gmbh Production and secretion of proteins of bacterial origin in filamentous fungi
EP0905306A1 (fr) 1997-09-26 1999-03-31 Consortium für elektrochemische Industrie GmbH Système à plusieurs constituants pour modifier, dégrader ou blanchir la lignine ou les matières contenant de la lignine ainsi que procédé l'utilisant
US6365390B1 (en) 1998-09-04 2002-04-02 University Of Georgia Research Foundation, Inc. Phenolic acid esterases, coding sequences and methods
US6602700B1 (en) 1998-09-04 2003-08-05 University Of Georgia Research Foundation, Inc. Phenolic acid esterases, coding sequences and methods
WO2002052100A2 (fr) 2000-12-22 2002-07-04 Iogen Bio-Products Corporation Etapes d'extraction alcaline faisant appel a une xylanase
WO2002057541A2 (fr) * 2001-01-18 2002-07-25 Iogen Bio-Products Corporation Procedes permettant un traitement de blanchiment a l'aide de xylanases
WO2003074780A1 (fr) * 2002-03-06 2003-09-12 Iogen Bio-Products Corporation Traitement de pate chimique par des xylanases
BR0312121A (pt) 2002-06-14 2007-04-03 Diversa Corp xinalases, ácidos nucléicos codificando-as e métodos para preparar e empregá-las
EP2548956A1 (fr) 2006-02-14 2013-01-23 Verenium Corporation Xylanases, acides nucléiques les codant et leurs procédés de fabrication et dýutilisation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI90888B (fi) * 1989-02-14 1993-12-31 Enso Gutzeit Oy Menetelmä selluloosamassan valkaisemiseksi
ZA904441B (en) * 1989-06-22 1991-03-27 Int Paper Co Enzymatic delignification of lignocellulosic material

Also Published As

Publication number Publication date
ATE128498T1 (de) 1995-10-15
CA2075187A1 (fr) 1991-08-03
DE69113444D1 (de) 1995-11-02
WO1991011553A1 (fr) 1991-08-08
ES2079062T3 (es) 1996-01-01
FI900549A (fi) 1991-08-03
EP0513140A1 (fr) 1992-11-19
FI89814C (fi) 1993-11-25
EP0513140B2 (fr) 1998-03-18
FI89814B (fi) 1993-08-13
ES2079062T5 (es) 1998-07-16
FI900549A0 (fi) 1990-02-02
JPH05509362A (ja) 1993-12-22

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