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FI900549A0 - FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA. - Google Patents

FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.

Info

Publication number
FI900549A0
FI900549A0 FI900549A FI900549A FI900549A0 FI 900549 A0 FI900549 A0 FI 900549A0 FI 900549 A FI900549 A FI 900549A FI 900549 A FI900549 A FI 900549A FI 900549 A0 FI900549 A0 FI 900549A0
Authority
FI
Finland
Prior art keywords
enzyme
steps
pulp
chemical
decreased
Prior art date
Application number
FI900549A
Other languages
Finnish (fi)
Other versions
FI900549L (en
FI89814C (en
FI89814B (en
Inventor
Marja Vaheri
Kimmo Ruohoniemi
Hannu Sonni
Original Assignee
Enso Gutzeit Oy
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=8529828&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI900549(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Enso Gutzeit Oy filed Critical Enso Gutzeit Oy
Priority to FI900549A priority Critical patent/FI89814C/en
Publication of FI900549A0 publication Critical patent/FI900549A0/en
Priority to AT91903684T priority patent/ATE128498T1/en
Priority to EP91903684A priority patent/EP0513140B2/en
Priority to PCT/FI1991/000033 priority patent/WO1991011553A1/en
Priority to DE69113444T priority patent/DE69113444D1/en
Priority to CA002075187A priority patent/CA2075187A1/en
Priority to JP3503752A priority patent/JPH05509362A/en
Priority to ES91903684T priority patent/ES2079062T5/en
Publication of FI900549L publication Critical patent/FI900549L/en
Publication of FI89814B publication Critical patent/FI89814B/en
Application granted granted Critical
Publication of FI89814C publication Critical patent/FI89814C/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
    • 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

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)

Abstract

The invention relates to a process for the bleaching of chemical pulp, process which comprises one or several oxidation steps and one or several alkali treatment steps and in which the pulp is treated with an enzyme. The essential idea of the invention is that the pulp is treated with an enzyme in two or more different steps of the process, an oxidation and/or alkali treatment being most preferably carried out between the enzyme treatment steps. The oxidizing chemical used is most preferably oxygen, although peroxide and/or chlorine and/or chlorine dioxide can also be used in addition to or instead of it, and in the enzyme treatment steps, which preferably number 2-4, the same enzyme or alternatively two or more different enzymes may be used. By the enzyme treatment according to the invention, the amount of toxic organic compounds inthe bleaching effluent is decreased and at the same time the chemical oxygen consumption of the effluent is decreased.
FI900549A 1990-02-02 1990-02-02 Process for bleaching cellulose pulp FI89814C (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FI900549A FI89814C (en) 1990-02-02 1990-02-02 Process for bleaching cellulose pulp
ES91903684T ES2079062T5 (en) 1990-02-02 1991-02-01 PROCEDURE FOR THE BLEACHING OF CHEMICAL PAPER PASTE.
PCT/FI1991/000033 WO1991011553A1 (en) 1990-02-02 1991-02-01 A process for the bleaching of chemical pulp
EP91903684A EP0513140B2 (en) 1990-02-02 1991-02-01 A process for the bleaching of chemical pulp
AT91903684T ATE128498T1 (en) 1990-02-02 1991-02-01 METHOD FOR BLEACHING CHEMICAL PAPER PULP.
DE69113444T DE69113444D1 (en) 1990-02-02 1991-02-01 METHOD FOR BLEACHING CHEMICAL PAPER FIBER.
CA002075187A CA2075187A1 (en) 1990-02-02 1991-02-01 Process for the bleaching of chemical pulp
JP3503752A JPH05509362A (en) 1990-02-02 1991-02-01 Chemical pulp bleaching method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI900549 1990-02-02
FI900549A FI89814C (en) 1990-02-02 1990-02-02 Process for bleaching cellulose pulp

Publications (4)

Publication Number Publication Date
FI900549A0 true FI900549A0 (en) 1990-02-02
FI900549L FI900549L (en) 1991-08-03
FI89814B FI89814B (en) 1993-08-13
FI89814C FI89814C (en) 1993-11-25

Family

ID=8529828

Family Applications (1)

Application Number Title Priority Date Filing Date
FI900549A FI89814C (en) 1990-02-02 1990-02-02 Process for bleaching cellulose pulp

Country Status (8)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI90670C (en) * 1991-05-02 1994-03-10 Metsae Serla Oy Treatment of alkali-treated pulp for use in papermaking
US7816129B2 (en) 1994-07-29 2010-10-19 Ab Enzymes Gmbh Production and secretion of proteins of bacterial origin in filamentous fungi
EP0905306A1 (en) 1997-09-26 1999-03-31 Consortium für elektrochemische Industrie GmbH Multicomponent system for modifying, decomposing or bleaching lignin or lignin-containing materials and method of using this system
WO2000014243A1 (en) 1998-09-04 2000-03-16 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
FI20030899L (en) 2000-12-22 2003-08-20 Iogen Bio Products Corp Alkaline extraction steps involving xylanase
US7320741B2 (en) 2001-01-18 2008-01-22 Iogen Bio-Products Corporation Method of xylanase treatment in a chlorine dioxide bleaching sequence
WO2003074780A1 (en) * 2002-03-06 2003-09-12 Iogen Bio-Products Corporation Xylanase treatment of chemical pulp
MXPA04012614A (en) 2002-06-14 2005-12-14 Diversa Corp Xylanases, nucleic adics encoding them and methods for making and using them.
EP1989302B1 (en) 2006-02-14 2018-04-11 BP Corporation North America Inc. Xylanases, nucleic acids encoding them and methods for making and using them

Family Cites Families (2)

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

Also Published As

Publication number Publication date
FI900549L (en) 1991-08-03
FI89814C (en) 1993-11-25
ATE128498T1 (en) 1995-10-15
ES2079062T3 (en) 1996-01-01
EP0513140A1 (en) 1992-11-19
EP0513140B1 (en) 1995-09-27
ES2079062T5 (en) 1998-07-16
JPH05509362A (en) 1993-12-22
CA2075187A1 (en) 1991-08-03
WO1991011553A1 (en) 1991-08-08
FI89814B (en) 1993-08-13
EP0513140B2 (en) 1998-03-18
DE69113444D1 (en) 1995-11-02

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Legal Events

Date Code Title Description
FG Patent granted

Owner name: ENSO-GUTZEIT OY

BB Publication of examined application
FG Patent granted

Owner name: ENSO GUTZEIT OY

MA Patent expired