FI890700A0 - Method for bleaching cellulose pulp - Google Patents

Method for bleaching cellulose pulp

Info

Publication number
FI890700A0
FI890700A0 FI890700A FI890700A FI890700A0 FI 890700 A0 FI890700 A0 FI 890700A0 FI 890700 A FI890700 A FI 890700A FI 890700 A FI890700 A FI 890700A FI 890700 A0 FI890700 A0 FI 890700A0
Authority
FI
Finland
Prior art keywords
pulp
oxidation
bleaching
chemical
chlorine
Prior art date
Application number
FI890700A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI90888B (en
FI890700A (en
Inventor
Marja Vaheri
Veikko Jokela
Kari Miikki
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=8527891&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI890700(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 FI890700A priority Critical patent/FI90888B/en
Publication of FI890700A0 publication Critical patent/FI890700A0/en
Priority to AT89117235T priority patent/ATE103351T1/en
Priority to EP89117235A priority patent/EP0383999B1/en
Priority to CA000611773A priority patent/CA1339594C/en
Priority to DE89117235T priority patent/DE68914135D1/en
Priority to ES89117235T priority patent/ES2050747T3/en
Priority to NO893714A priority patent/NO176406C/en
Priority to JP1241667A priority patent/JPH02221482A/en
Publication of FI890700A publication Critical patent/FI890700A/en
Publication of FI90888B publication Critical patent/FI90888B/en
Application granted granted Critical

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
    • D21C9/1057—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
    • 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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Noodles (AREA)
  • Cereal-Derived Products (AREA)
  • Table Devices Or Equipment (AREA)

Abstract

The invention concerns a procedure for the bleaching of pulp using an oxidating bleaching chemical containing chlorine. The essential features of the invention are that the chemical used in the oxidation stage has a chlorine dioxide content of at least 50 %, that the pulp is subjected to enzyme treatment either in conjunction with or before the oxidation, and that, after the oxidation and enzyme treatment, the pulp is treated with an alkali. The use of enzymes reduces the amount of chlorophenols and other forms of organically bound chlorine in the spent bleach liquor, simultaneously lowering its chemical oxygen demand.
FI890700A 1989-02-14 1989-02-14 Method for bleaching cellulose pulp FI90888B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FI890700A FI90888B (en) 1989-02-14 1989-02-14 Method for bleaching cellulose pulp
JP1241667A JPH02221482A (en) 1989-02-14 1989-09-18 Bleaching of pulp
CA000611773A CA1339594C (en) 1989-02-14 1989-09-18 Procedure for the bleaching of pulp involving enzyme treatment and the use in the oxidation stage of a chemical with at least 50% chlorine dioxide content
EP89117235A EP0383999B1 (en) 1989-02-14 1989-09-18 Procedure for the bleaching of pulp
AT89117235T ATE103351T1 (en) 1989-02-14 1989-09-18 METHOD OF BLEACHING PULP.
DE89117235T DE68914135D1 (en) 1989-02-14 1989-09-18 Process for bleaching pulp.
ES89117235T ES2050747T3 (en) 1989-02-14 1989-09-18 PROCEDURE FOR THE BLEACHING OF PAPER PASTA.
NO893714A NO176406C (en) 1989-02-14 1989-09-18 Method of Bleaching Mass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI890700A FI90888B (en) 1989-02-14 1989-02-14 Method for bleaching cellulose pulp

Publications (3)

Publication Number Publication Date
FI890700A0 true FI890700A0 (en) 1989-02-14
FI890700A FI890700A (en) 1990-08-15
FI90888B FI90888B (en) 1993-12-31

Family

ID=8527891

Family Applications (1)

Application Number Title Priority Date Filing Date
FI890700A FI90888B (en) 1989-02-14 1989-02-14 Method for bleaching cellulose pulp

Country Status (8)

Country Link
EP (1) EP0383999B1 (en)
JP (1) JPH02221482A (en)
AT (1) ATE103351T1 (en)
CA (1) CA1339594C (en)
DE (1) DE68914135D1 (en)
ES (1) ES2050747T3 (en)
FI (1) FI90888B (en)
NO (1) NO176406C (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI86896B (en) * 1989-05-04 1992-07-15 Enso Gutzeit Oy FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.
SE465320B (en) * 1990-01-10 1991-08-26 Korsnaes Ab PREPARATIONS SUBMITTING ENZYMATIC DELIGNIFICATION ACTIVITY, MADE TO MAKE THE SAME AND APPLICATIONS THEREOF
FI89814C (en) * 1990-02-02 1993-11-25 Enso Gutzeit Oy FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA
US5837515A (en) * 1990-05-16 1998-11-17 Alko-Yhtiot Oy Enzyme preparations and methods for their production
JP2859393B2 (en) * 1990-07-24 1999-02-17 ノボ ノルディスク アクティーゼルスカブ Cellulase and method for producing the same
DK203490D0 (en) * 1990-08-24 1990-08-24 Novo Nordisk As PROCEDURE FOR TREATING LIGNOCELLULOS PULP AND APPARATUS FOR PERFORMING THE PROCESS
DE4129739A1 (en) * 1990-09-11 1992-03-12 Sandoz Ag Chlorine-free bleaching of paper pulp
FI108800B (en) * 1991-05-07 2002-03-28 Iogen Corp A method and apparatus for using an enzyme in the manufacture and bleaching of pulp
CA2044100A1 (en) * 1991-06-07 1992-12-08 Janice Hamilton Biobleaching process
US5498534A (en) * 1992-03-25 1996-03-12 The United States Of America As Represented By The Secretary Of Agriculture Method of removing color from wood pulp using xylanase from streptomyces roseiscleroticus NRRL B-11019
US5369024A (en) * 1992-03-25 1994-11-29 The United States Of America As Represented By The Secretary Of Agriculture Xylanase from streptomyces roseiscleroticus NRRL-11019 for removing color from kraft wood pulps
DE4422307A1 (en) * 1994-06-17 1995-12-21 Melitta Haushaltsprodukte Process for delignifying and bleaching unbleached pulp suspensions using nitrogen compounds
US5871730A (en) * 1994-07-29 1999-02-16 Universite De Sherbrooke Thermostable xylanase DNA, protein and methods of use
US7816129B2 (en) 1994-07-29 2010-10-19 Ab Enzymes Gmbh Production and secretion of proteins of bacterial origin in filamentous fungi
US6300114B1 (en) 1994-07-29 2001-10-09 Rohm Enzyme Finland Oy Sequences of xylanase and xylanase expression vectors
US5935836A (en) * 1994-07-29 1999-08-10 Rohm Enzyme Finland Oy Actinomadura xylanase sequences and methods of use
AU2002229430A1 (en) 2001-01-18 2002-07-30 Iogen Bio-Products Corporation Use of xylanase in pulp bleaching
AU2003208216A1 (en) * 2002-03-06 2003-09-16 Iogen Bio-Products Corporation Xylanase treatment of chemical pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1086905A (en) * 1977-10-25 1980-10-07 W. Howard Rapson Bleach plant operation
JPS5468402A (en) * 1977-11-09 1979-06-01 Kogyo Gijutsuin Property modification of biochemical pulp
FI81395B (en) * 1988-03-14 1990-06-29 Cultor Oy FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.

Also Published As

Publication number Publication date
FI90888B (en) 1993-12-31
NO893714L (en) 1990-08-15
EP0383999B1 (en) 1994-03-23
DE68914135D1 (en) 1994-04-28
NO893714D0 (en) 1989-09-18
NO176406B (en) 1994-12-19
NO176406C (en) 1995-03-29
EP0383999A2 (en) 1990-08-29
EP0383999A3 (en) 1990-12-12
CA1339594C (en) 1997-12-23
ES2050747T3 (en) 1994-06-01
FI890700A (en) 1990-08-15
ATE103351T1 (en) 1994-04-15
JPH02221482A (en) 1990-09-04

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Legal Events

Date Code Title Description
BB Publication of examined application
CD Patent refused following opposition
FC Application refused

Owner name: ENSO GUTZEIT OY