NZ239501A - Treatment of unbleached wood pulp by adding a xylanase to it before the last washing, apparatus therefor - Google Patents

Treatment of unbleached wood pulp by adding a xylanase to it before the last washing, apparatus therefor

Info

Publication number
NZ239501A
NZ239501A NZ239501A NZ23950191A NZ239501A NZ 239501 A NZ239501 A NZ 239501A NZ 239501 A NZ239501 A NZ 239501A NZ 23950191 A NZ23950191 A NZ 23950191A NZ 239501 A NZ239501 A NZ 239501A
Authority
NZ
New Zealand
Prior art keywords
treatment
xylanase
wood pulp
apparatus therefor
last washing
Prior art date
Application number
NZ239501A
Inventor
Lars Saaby Pedersen
Original Assignee
Novo Nordisk As
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 Novo Nordisk As filed Critical Novo Nordisk As
Publication of NZ239501A publication Critical patent/NZ239501A/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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

A process for treatment of lignocellulosic pulp comprising a multistage washing of the unbleached kraft brown stock and a xylanase treatment. The xylanase treatment is carried out in a holding tank introduced upstream the first washing unit or downstream one or more of the other washing units except for the last washing unit.
NZ239501A 1990-08-24 1991-08-22 Treatment of unbleached wood pulp by adding a xylanase to it before the last washing, apparatus therefor NZ239501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK203490A DK203490D0 (en) 1990-08-24 1990-08-24 PROCEDURE FOR TREATING LIGNOCELLULOS PULP AND APPARATUS FOR PERFORMING THE PROCESS

Publications (1)

Publication Number Publication Date
NZ239501A true NZ239501A (en) 1993-01-27

Family

ID=8109613

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ239501A NZ239501A (en) 1990-08-24 1991-08-22 Treatment of unbleached wood pulp by adding a xylanase to it before the last washing, apparatus therefor

Country Status (11)

Country Link
EP (1) EP0547100B1 (en)
JP (1) JPH05509137A (en)
AT (1) ATE118842T1 (en)
BR (1) BR9106763A (en)
CA (1) CA2090338A1 (en)
DE (1) DE69107620D1 (en)
DK (1) DK203490D0 (en)
ES (1) ES2069307T3 (en)
FI (1) FI930803A0 (en)
NZ (1) NZ239501A (en)
WO (1) WO1992003608A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MXPA03011194A (en) 2001-06-06 2004-02-26 Novozymes As Endo-beta-1,4-glucanase from bacillus.
CN101967490B (en) 2002-06-14 2014-07-16 先正达公司 Xylanases, nucleic adics encoding them and methods for making and using them
DK1989302T3 (en) 2006-02-14 2018-07-23 Bp Corp North America Inc XYLANASES, NUCLEIC ACID CODING THEM AND PROCEDURES FOR THEIR PREPARATION AND USE
WO2009073709A1 (en) 2007-12-06 2009-06-11 Novozymes A/S Polypeptides having acetylxylan esterase activity and polynucleotides encoding same
DK2483403T3 (en) 2009-09-29 2018-02-12 Novozymes Inc POLYPEPTIDES WITH XYLANASE ACTIVITY AND POLYNUCLEOTIDES CODING THEM
CA2780198A1 (en) 2009-11-06 2011-05-12 Novozymes, Inc. Polypeptides having xylanase activity and polynucleotides encoding same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373107B1 (en) * 1988-11-23 1994-03-23 Sandoz Ag Use of enzymes of Aureobasidium pullulans in pulp bleaching
FI90888B (en) * 1989-02-14 1993-12-31 Enso Gutzeit Oy Method for bleaching cellulose pulp

Also Published As

Publication number Publication date
BR9106763A (en) 1993-06-29
FI930803A (en) 1993-02-23
JPH05509137A (en) 1993-12-16
DK203490D0 (en) 1990-08-24
CA2090338A1 (en) 1992-02-25
ATE118842T1 (en) 1995-03-15
EP0547100A1 (en) 1993-06-23
FI930803A0 (en) 1993-02-23
DE69107620D1 (en) 1995-03-30
WO1992003608A1 (en) 1992-03-05
EP0547100B1 (en) 1995-02-22
ES2069307T3 (en) 1995-05-01

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