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FI945783L - Method for making washing more efficient - Google Patents

Method for making washing more efficient Download PDF

Info

Publication number
FI945783L
FI945783L FI945783A FI945783A FI945783L FI 945783 L FI945783 L FI 945783L FI 945783 A FI945783 A FI 945783A FI 945783 A FI945783 A FI 945783A FI 945783 L FI945783 L FI 945783L
Authority
FI
Finland
Prior art keywords
washing
pulp
efficient
washed
fractionating
Prior art date
Application number
FI945783A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI945783A0 (en
Inventor
Kari Ala-Kaila
Kaj Henricson
Pekka Tervola
Original Assignee
Ahlstroem 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
Application filed by Ahlstroem Oy filed Critical Ahlstroem Oy
Priority to FI945783A priority Critical patent/FI945783L/en
Publication of FI945783A0 publication Critical patent/FI945783A0/en
Priority to PCT/FI1995/000668 priority patent/WO1996017996A1/en
Publication of FI945783L publication Critical patent/FI945783L/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/40—Washing the fibres
    • 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
    • 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
    • D21C9/04—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in diffusers ; Washing of pulp of fluid consistency without substantially thickening

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

The present invention relates to a method of intensifying washing of pulp, especially in connection with oxygen delignification. The invention especially relates to the utilization of fractionating wash in oxygen delignification. The pulp is washed in at least two fractionating displacement washing stages (12, 22). Two different filtrate fractions (S1, S2) are removed from the second washing stage. These filtrates are used as washing liquids in the first washing stage (12). The temperature in the washing system is maintained above 90 DEG C and the thickness of the pulp layer to be washed is higher than 70 mm.
FI945783A 1994-12-08 1994-12-08 Method for making washing more efficient FI945783L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI945783A FI945783L (en) 1994-12-08 1994-12-08 Method for making washing more efficient
PCT/FI1995/000668 WO1996017996A1 (en) 1994-12-08 1995-12-05 Washing of pulp in a fractionating washing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI945783A FI945783L (en) 1994-12-08 1994-12-08 Method for making washing more efficient

Publications (2)

Publication Number Publication Date
FI945783A0 FI945783A0 (en) 1994-12-08
FI945783L true FI945783L (en) 1996-06-09

Family

ID=8541944

Family Applications (1)

Application Number Title Priority Date Filing Date
FI945783A FI945783L (en) 1994-12-08 1994-12-08 Method for making washing more efficient

Country Status (2)

Country Link
FI (1) FI945783L (en)
WO (1) WO1996017996A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI112957B (en) * 1999-07-21 2004-02-13 Metso Paper Pori Oy Method and apparatus for washing pulp
EP1574614B1 (en) 2000-10-17 2015-11-11 James Hardie Technology Limited Method for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials
CA2424699C (en) * 2000-10-17 2010-04-27 James Hardie Research Pty Limited Method and apparatus for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials
ATE359245T1 (en) 2001-03-09 2007-05-15 James Hardie Int Finance Bv FIBER REINFORCED CEMENT MATERIALS USING CHEMICALLY MODIFIED FIBERS WITH IMPROVED MIXABILITY
US20030213569A1 (en) * 2002-05-15 2003-11-20 Brian Wester Very low COD unbleached pulp
CA2648966C (en) 2006-04-12 2015-01-06 James Hardie International Finance B.V. A surface sealed reinforced building element
FI123023B (en) * 2009-09-01 2012-10-15 Andritz Oy Method and apparatus for separating soap
FI130070B (en) * 2018-03-07 2023-01-31 Andritz Oy Method of producing dissolving pulp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI77063B (en) * 1986-12-17 1988-09-30 Ahlstroem Oy FOERFARANDE FOER EFFEKTIVERING AV FIBERSUSPENSIONSTVAETT.
US5567262A (en) * 1991-04-16 1996-10-22 Ahlstrom Machinery Inc. Two stage pressure diffuser

Also Published As

Publication number Publication date
WO1996017996A1 (en) 1996-06-13
FI945783A0 (en) 1994-12-08

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Legal Events

Date Code Title Description
GB Transfer or assigment of application

Owner name: AHLSTROM MACHINERY OY

FD Application lapsed