SE9102589D0 - CHLORINE-FREE PROCESS FOR BLEACHING PULP - Google Patents

CHLORINE-FREE PROCESS FOR BLEACHING PULP

Info

Publication number
SE9102589D0
SE9102589D0 SE9102589A SE9102589A SE9102589D0 SE 9102589 D0 SE9102589 D0 SE 9102589D0 SE 9102589 A SE9102589 A SE 9102589A SE 9102589 A SE9102589 A SE 9102589A SE 9102589 D0 SE9102589 D0 SE 9102589D0
Authority
SE
Sweden
Prior art keywords
chlorine
pulp
extracted
free process
treated
Prior art date
Application number
SE9102589A
Other languages
Swedish (sv)
Other versions
SE9102589L (en
Inventor
R L Farrell
Original Assignee
Sandoz Ag
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
Application filed by Sandoz Ag filed Critical Sandoz Ag
Publication of SE9102589D0 publication Critical patent/SE9102589D0/en
Publication of SE9102589L publication Critical patent/SE9102589L/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
    • D21C9/12—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)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

A chlorine-free method for bleaching chemical pulps, particularly kraft pulp, uses a first step of treating the pulp with a hemicellulose acting enzyme of a microorganism. Subsequently, the treated pulp is extracted, treated with chlorine dioxide, re-extracted and retreated with chlorine dioxide to result in a brightness level of at least 88. The enzyme may be a xylanase or a mannanase or a mixture. The extraction steps may involve the addition of oxygen under pressure or peroxide. A hypochloride treatment may follow the first extraction step to give a six-step process.
SE9102589A 1990-09-11 1991-09-09 CHLORINE-FREE PROCEDURE FOR BLACK PAPER PILLOW SE9102589L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58074390A 1990-09-11 1990-09-11

Publications (2)

Publication Number Publication Date
SE9102589D0 true SE9102589D0 (en) 1991-09-09
SE9102589L SE9102589L (en) 1992-03-12

Family

ID=24322372

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9102589A SE9102589L (en) 1990-09-11 1991-09-09 CHLORINE-FREE PROCEDURE FOR BLACK PAPER PILLOW

Country Status (7)

Country Link
JP (1) JPH04245988A (en)
CA (1) CA2050986A1 (en)
DE (1) DE4129739A1 (en)
FR (1) FR2666597B1 (en)
GB (1) GB2248075B (en)
IT (1) IT1249694B (en)
SE (1) SE9102589L (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06116889A (en) * 1992-09-30 1994-04-26 New Oji Paper Co Ltd Method for bleaching wood chemical pulp
JP3262646B2 (en) * 1993-07-09 2002-03-04 日本製紙株式会社 Pulp bleaching method
JPH0734396A (en) * 1993-07-15 1995-02-03 Nippon Paper Ind Co Ltd Base paper for laminated sheet
JP3244887B2 (en) * 1993-10-21 2002-01-07 三菱製紙株式会社 Paper for food containers
FI935187A (en) * 1993-11-22 1995-05-23 Valtion Teknillinen Procedure for preparing bleached cellulose pulp
JP3610686B2 (en) * 1996-07-31 2005-01-19 王子製紙株式会社 Method for producing coated paper for printing
EP1325961A1 (en) * 1997-06-10 2003-07-09 Danisco Sweeteners Oy A process for the production of crystalline xylose
AU2002226210A1 (en) 2000-12-22 2002-07-08 Iogen Bio-Products Corporation Alkaline extraction stages comprising xylanase
CA2435279A1 (en) 2001-01-18 2002-07-25 Iogen Bio-Products Corporation Use of xylanase in pulp bleaching
AU2002351904A1 (en) * 2001-12-03 2003-06-17 Iogen Bio-Products Corporation Bleaching stage using xylanase with hydrogen peroxide, peracids, or a combination thereof
WO2003074780A1 (en) * 2002-03-06 2003-09-12 Iogen Bio-Products Corporation Xylanase treatment of chemical pulp
WO2009138090A2 (en) * 2008-05-14 2009-11-19 Rådet For Agroindustri A process for the production of hydrolysed plant material
WO2012084842A1 (en) 2010-12-22 2012-06-28 Akzo Nobel Chemicals International B.V. Process for improving chlorine dioxide bleaching of pulp
CN102182094B (en) * 2011-04-12 2012-03-14 山东轻工业学院 Salix mongolica sulfate pulp bleaching process

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3364419D1 (en) * 1982-04-30 1986-08-14 Ici Plc Delignification of lignocellulosic material
FI81395B (en) * 1988-03-14 1990-06-29 Cultor Oy FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.
EP0373107B1 (en) * 1988-11-23 1994-03-23 Sandoz Ag Use of enzymes of Aureobasidium pullulans in pulp bleaching
US5179021A (en) * 1989-02-10 1993-01-12 Gil Inc. (Now Ici Canada Inc.) Pulp bleaching process comprising oxygen delignification and xylanase enzyme treatment
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

Also Published As

Publication number Publication date
GB2248075B (en) 1994-06-29
DE4129739A1 (en) 1992-03-12
JPH04245988A (en) 1992-09-02
FR2666597A1 (en) 1992-03-13
SE9102589L (en) 1992-03-12
IT1249694B (en) 1995-03-09
GB9119218D0 (en) 1991-10-23
GB2248075A (en) 1992-03-25
FR2666597B1 (en) 1996-10-31
ITRM910670A0 (en) 1991-09-10
ITRM910670A1 (en) 1993-03-10
CA2050986A1 (en) 1992-03-12

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