CA1334581C - Procedure for bleaching cellulose pulp involving the use of combined enzyme treatment and a bleaching process employing chlorine chemicals - Google Patents

Procedure for bleaching cellulose pulp involving the use of combined enzyme treatment and a bleaching process employing chlorine chemicals

Info

Publication number
CA1334581C
CA1334581C CA000593523A CA593523A CA1334581C CA 1334581 C CA1334581 C CA 1334581C CA 000593523 A CA000593523 A CA 000593523A CA 593523 A CA593523 A CA 593523A CA 1334581 C CA1334581 C CA 1334581C
Authority
CA
Canada
Prior art keywords
pulp
bleaching
enzyme
chlorine
bleached
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
CA000593523A
Other languages
French (fr)
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
Suomen Sokeri 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=CA1334581(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Suomen Sokeri Oy filed Critical Suomen Sokeri Oy
Application granted granted Critical
Publication of CA1334581C publication Critical patent/CA1334581C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
  • 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.

Claims (9)

1. A method for reducing residual chlorine content in hardwood pulp that has been previously bleached using chlorine chemicals, wherein said pulp is subjected to enzyme treatment and chlorine chemical treatment during the bleaching process, and wherein said enzyme which is used is hemicellulase, cellulase, esterase or a mixture thereof.
2. Method according to claim 1, wherein the pulp is treated with said enzyme either before or after the bleaching treatment.
3. Method according to claim 1, wherein the enzyme treatment takes place within the temperature range 10 to 90°C
and at pH 3.0 to 7.5.
4. Method according to claim 3, wherein the temperature range is 40 to 70°C and the pH is 4.0 to 6Ø
5. Method according to any one of claims 1 to 4, wherein to unbleached pulp obtained by birch sulphate cooking is added said enzyme which is allowed to act, whereafter the pulp is subjected to bleaching comprising consecutive oxidizing and extracting steps, using for bleaching chemicals in the oxidizing steps chlorine gas, chlorine dioxide or a mixture thereof and in the extracting steps, sodium hydroxide.
6. Method according to claim 5, wherein the bleaching is a five-step chlorine bleaching.
7. Method according to claim 5, wherein the pulp obtained by birch sulphate cooking is bleached in consecutive oxidizing and extracting steps, using in the first step chlorine gas, chlorine dioxide or a mixture thereof and in the subsequent extracting step, sodium hydroxide, and wherein after bleaching to the pulp suspension thus obtained is added said enzyme, which is allowed to act for a predetermined time.
8. The use of enzyme for lowering the residual chlorine content of bleached cellulose pulp made from hardwood, the enzyme being hemicellulase, cellulase, esterase or a mixture thereof.
9. The use of enzyme according to claim 8, for lowering the residual chlorine content of bleached cellulose pulp that is going to be processed to become foodstuff package cardboard or paper.
CA000593523A 1988-03-14 1989-03-13 Procedure for bleaching cellulose pulp involving the use of combined enzyme treatment and a bleaching process employing chlorine chemicals Expired - Lifetime CA1334581C (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.
FI881192 1988-03-14

Publications (1)

Publication Number Publication Date
CA1334581C true CA1334581C (en) 1995-02-28

Family

ID=8526077

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000593523A Expired - Lifetime CA1334581C (en) 1988-03-14 1989-03-13 Procedure for bleaching cellulose pulp involving the use of combined enzyme treatment and a bleaching process employing chlorine chemicals

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
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
ATE135429T1 (en) 1996-03-15
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

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