ATE135429T1 - METHOD FOR REDUCING RESIDUAL CHLORINE IN HARDWOOD PULP - Google Patents

METHOD FOR REDUCING RESIDUAL CHLORINE IN HARDWOOD PULP

Info

Publication number
ATE135429T1
ATE135429T1 AT89903748T AT89903748T ATE135429T1 AT E135429 T1 ATE135429 T1 AT E135429T1 AT 89903748 T AT89903748 T AT 89903748T AT 89903748 T AT89903748 T AT 89903748T AT E135429 T1 ATE135429 T1 AT E135429T1
Authority
AT
Austria
Prior art keywords
pulp
hardwood
residual chlorine
chlorine content
enzyme
Prior art date
Application number
AT89903748T
Other languages
German (de)
Inventor
Mirja Salkinoja-Salonen
Marja Vaheri
Marja Koljonen
Original Assignee
Genencor Int Europ
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=ATE135429(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Genencor Int Europ filed Critical Genencor Int Europ
Application granted granted Critical
Publication of ATE135429T1 publication Critical patent/ATE135429T1/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
    • D21C9/12—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)
  • Hard Magnetic Materials (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Detergent Compositions (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (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.
AT89903748T 1988-03-14 1989-03-13 METHOD FOR REDUCING RESIDUAL CHLORINE IN HARDWOOD PULP ATE135429T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI881192A FI81395B (en) 1988-03-14 1988-03-14 FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.

Publications (1)

Publication Number Publication Date
ATE135429T1 true ATE135429T1 (en) 1996-03-15

Family

ID=8526077

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89903748T ATE135429T1 (en) 1988-03-14 1989-03-13 METHOD FOR REDUCING RESIDUAL CHLORINE IN HARDWOOD PULP

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
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
US6300114B1 (en) 1994-07-29 2001-10-09 Rohm Enzyme Finland Oy Sequences of xylanase and xylanase expression vectors
CA2435279A1 (en) 2001-01-18 2002-07-25 Iogen Bio-Products Corporation Use of xylanase in pulp bleaching
WO2003074780A1 (en) * 2002-03-06 2003-09-12 Iogen Bio-Products Corporation 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
EP0373107B1 (en) * 1988-11-23 1994-03-23 Sandoz Ag Use of enzymes of Aureobasidium pullulans in pulp bleaching

Also Published As

Publication number Publication date
EP0407421B1 (en) 1996-03-13
JPH03505758A (en) 1991-12-12
FI881192A (en) 1989-09-15
CA1334581C (en) 1995-02-28
BR8907314A (en) 1991-03-19
FI881192A0 (en) 1988-03-14
WO1989008738A1 (en) 1989-09-21
EP0407421A1 (en) 1991-01-16
DK175185B1 (en) 2004-06-28
NO903913D0 (en) 1990-09-07
AU626846B2 (en) 1992-08-13
DK211990D0 (en) 1990-09-04
NO174722B (en) 1994-03-14
NZ228308A (en) 1990-06-26
FI81395B (en) 1990-06-29
NO903913L (en) 1990-09-07
AU3292389A (en) 1989-10-05
DK211990A (en) 1990-11-07
DE68925967D1 (en) 1996-04-18
NO174722C (en) 1994-06-22
DE68925967T2 (en) 1996-09-12

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification