DE68925967D1 - METHOD FOR REDUCING RESIDUAL CHLORINE IN FOLIAGE WOOD - Google Patents

METHOD FOR REDUCING RESIDUAL CHLORINE IN FOLIAGE WOOD

Info

Publication number
DE68925967D1
DE68925967D1 DE68925967T DE68925967T DE68925967D1 DE 68925967 D1 DE68925967 D1 DE 68925967D1 DE 68925967 T DE68925967 T DE 68925967T DE 68925967 T DE68925967 T DE 68925967T DE 68925967 D1 DE68925967 D1 DE 68925967D1
Authority
DE
Germany
Prior art keywords
pulp
hardwood
residual chlorine
chlorine content
enzyme
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.)
Revoked
Application number
DE68925967T
Other languages
German (de)
Other versions
DE68925967T2 (en
Inventor
Mirja Salkinoja-Salonen
Marja Vaheri
Marja Koljonen
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.)
Genencor International Europe Oy
Original Assignee
Genencor International Europe 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=8526077&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE68925967(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Genencor International Europe Oy filed Critical Genencor International Europe Oy
Publication of DE68925967D1 publication Critical patent/DE68925967D1/en
Application granted granted Critical
Publication of DE68925967T2 publication Critical patent/DE68925967T2/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • 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
    • D21C9/1026—Other features in bleaching processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Hard Magnetic Materials (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Detergent Compositions (AREA)

Abstract

The present invention concerns a procedure for bleaching cellulose pulp obtained from hardwood, wherein bleaching chemical containing chlorine is used. The essential feature of the invention is that the residual chlorine content of the bleached pulp is reduced by subjecting the pulp to enzyme treatment. With the enzyme especially the removal from the pulp of chlorine-binding extractive substances present in hardwood pulp is promoted. The invention furthermore concerns the use of enzyme towards lowering the residual chlorine content of bleached cellulose pulp made from hardwood. Such cellulose pulp is particularly contemplated which will be converted into foodstuff package cardboard or paper, which are commonly disposed of by burning. Lowered chlorine content reduces the risk of producing toxic dioxin at the incineration step.
DE68925967T 1988-03-14 1989-03-13 METHOD FOR REDUCING RESIDUAL CHLORINE IN FOLIAGE WOOD Revoked DE68925967T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI881192A FI81395B (en) 1988-03-14 1988-03-14 FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.
PCT/FI1989/000045 WO1989008738A1 (en) 1988-03-14 1989-03-13 Procedure for bleaching cellulose pulp

Publications (2)

Publication Number Publication Date
DE68925967D1 true DE68925967D1 (en) 1996-04-18
DE68925967T2 DE68925967T2 (en) 1996-09-12

Family

ID=8526077

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68925967T Revoked DE68925967T2 (en) 1988-03-14 1989-03-13 METHOD FOR REDUCING RESIDUAL CHLORINE IN FOLIAGE WOOD

Country Status (12)

Country Link
EP (1) EP0407421B1 (en)
JP (1) JPH03505758A (en)
AT (1) ATE135429T1 (en)
AU (1) AU626846B2 (en)
BR (1) BR8907314A (en)
CA (1) CA1334581C (en)
DE (1) DE68925967T2 (en)
DK (1) DK175185B1 (en)
FI (1) FI81395B (en)
NO (1) NO174722C (en)
NZ (1) NZ228308A (en)
WO (1) WO1989008738A1 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5298405A (en) * 1986-04-30 1994-03-29 Alko Limited Enzyme preparations with recombinantly-altered cellulose profiles and methods for their production
FI90888B (en) * 1989-02-14 1993-12-31 Enso Gutzeit Oy Method for bleaching cellulose pulp
FI86896B (en) * 1989-05-04 1992-07-15 Enso Gutzeit Oy FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.
DK420289D0 (en) * 1989-08-25 1989-08-25 Novo Nordisk As METHOD OF TREATING LIGNOCELLULOSE PULP
NZ235679A (en) * 1989-10-18 1993-01-27 Int Paper Co Bleaching lignocellulosic pulp using (a) treatment with xylanase and (b) one or more chemical bleaching stages
SE465320B (en) * 1990-01-10 1991-08-26 Korsnaes Ab PREPARATIONS SUBMITTING ENZYMATIC DELIGNIFICATION ACTIVITY, MADE TO MAKE THE SAME AND APPLICATIONS THEREOF
FI88315C (en) * 1990-04-04 1993-04-26 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
GB9018426D0 (en) * 1990-08-22 1990-10-03 Sandoz Ltd Improvements in or relating to novel compounds
NZ239500A (en) * 1990-08-24 1993-08-26 Novo Nordisk As Xylanases obtained from bacillus pumilus and use in a lignocellulosic chemical pulping 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
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
US6300114B1 (en) 1994-07-29 2001-10-09 Rohm Enzyme Finland Oy Sequences of xylanase and xylanase expression vectors
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
US5935836A (en) * 1994-07-29 1999-08-10 Rohm Enzyme Finland Oy Actinomadura xylanase sequences and methods of use
US7320741B2 (en) 2001-01-18 2008-01-22 Iogen Bio-Products Corporation Method of xylanase treatment in a chlorine dioxide bleaching sequence
CN100346030C (en) * 2002-03-06 2007-10-31 埃欧金生物制品公司 Xylanase treatment of chemical pulp
CN104963206A (en) * 2014-12-11 2015-10-07 华东理工常熟研究院有限公司 Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ216726A (en) * 1985-07-15 1990-08-28 Repligen Corp Use of lignin-degrading enzymes from phanerochaete chrysosporium for treatment of wood pulp and e1 effluent
ZA894239B (en) * 1988-06-08 1990-03-28 Int Paper Co Enzymatic delignification of lignocellulosic material
DE68914112T2 (en) * 1988-11-23 1994-08-04 Sandoz Ag Use of enzymes from Aureobasidium pullulans for pulp bleaching.

Also Published As

Publication number Publication date
DK211990A (en) 1990-11-07
AU3292389A (en) 1989-10-05
BR8907314A (en) 1991-03-19
WO1989008738A1 (en) 1989-09-21
FI881192A0 (en) 1988-03-14
NZ228308A (en) 1990-06-26
NO174722C (en) 1994-06-22
FI81395B (en) 1990-06-29
NO903913L (en) 1990-09-07
EP0407421B1 (en) 1996-03-13
CA1334581C (en) 1995-02-28
DE68925967T2 (en) 1996-09-12
FI881192A (en) 1989-09-15
JPH03505758A (en) 1991-12-12
DK175185B1 (en) 2004-06-28
NO903913D0 (en) 1990-09-07
DK211990D0 (en) 1990-09-04
NO174722B (en) 1994-03-14
AU626846B2 (en) 1992-08-13
ATE135429T1 (en) 1996-03-15
EP0407421A1 (en) 1991-01-16

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation