WO1988004706A1 - Method for washing of alcaline pulp - Google Patents

Method for washing of alcaline pulp Download PDF

Info

Publication number
WO1988004706A1
WO1988004706A1 PCT/SE1987/000623 SE8700623W WO8804706A1 WO 1988004706 A1 WO1988004706 A1 WO 1988004706A1 SE 8700623 W SE8700623 W SE 8700623W WO 8804706 A1 WO8804706 A1 WO 8804706A1
Authority
WO
WIPO (PCT)
Prior art keywords
washing
pulp
carbon dioxide
stage
filtrate
Prior art date
Application number
PCT/SE1987/000623
Other languages
English (en)
French (fr)
Inventor
Monica BOKSTRÖM
Raimo Rasimus
Original Assignee
Aga Aktiebolag
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
Priority claimed from SE8605510A external-priority patent/SE8605510L/
Application filed by Aga Aktiebolag filed Critical Aga Aktiebolag
Priority to BR8707606A priority Critical patent/BR8707606A/pt
Priority to JP50116588A priority patent/JPH0778315B2/ja
Priority to AT88900488T priority patent/ATE67536T1/de
Publication of WO1988004706A1 publication Critical patent/WO1988004706A1/en
Priority to NO883736A priority patent/NO172550C/no
Priority to FI883851A priority patent/FI90256C/fi

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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents

Definitions

  • a further object of the present invention is to emascu ⁇ late alkaline, cellulosic pulp of sodium ions.
  • a third obj ect of the present invention is to increase the washing-out , from alkaline, cell ulosic pulp, of substances which contribute to chemical oxygen demand (COD) .
  • the washed pulp departs from the fourth filter 18 at reference numeral 13.
  • the filter cake is comminuted by shredders 8.
  • Filtrate from one filter is used a washing liquid in the preceding filter and dilution liquid in the same filter. Normally, pure water is added to the last filter 18 as washing liquid, entering through a conduit 12.
  • Water is added to the last washing filter 18, this water being admixed with carbon dioxide and/or sulphur dioxide.
  • a pH sensor device may also be disposed in the conduit 28.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
PCT/SE1987/000623 1986-12-22 1987-12-21 Method for washing of alcaline pulp WO1988004706A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR8707606A BR8707606A (pt) 1986-12-22 1987-12-21 Processo para lavagem de polpa alcalina
JP50116588A JPH0778315B2 (ja) 1986-12-22 1987-12-21 アルカリ法パルプの洗浄方法
AT88900488T ATE67536T1 (de) 1986-12-22 1987-12-21 Verfahren zum waschen einer alkalischen pulpe.
NO883736A NO172550C (no) 1986-12-22 1988-08-19 Fremgangsmåte ved vasking av alkalisk cellulosemasse
FI883851A FI90256C (fi) 1986-12-22 1988-08-19 Menetelmä emäksisen massan pesemiseksi

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8605510-0 1986-12-22
SE8605510A SE8605510L (sv) 1986-12-22 1986-12-22 Sett vid tvettning av massa
PCT/SE1987/000198 WO1988004705A1 (en) 1986-12-22 1987-04-16 Method for washing of alcaline pulp
SEPCT/SE87/00198 1987-04-16

Publications (1)

Publication Number Publication Date
WO1988004706A1 true WO1988004706A1 (en) 1988-06-30

Family

ID=26659637

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000623 WO1988004706A1 (en) 1986-12-22 1987-12-21 Method for washing of alcaline pulp

Country Status (3)

Country Link
EP (1) EP0296198B1 (xx)
DE (1) DE3773204D1 (xx)
WO (1) WO1988004706A1 (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5401362A (en) * 1993-03-24 1995-03-28 Kamyr, Inc. Control of metals and dissolved organics in the bleach plant
US5509999A (en) * 1993-03-24 1996-04-23 Kamyr, Inc. Treatment of bleach plant effluents
WO1999045202A1 (en) * 1998-03-03 1999-09-10 Aga Aktiebolag Improved papermaking processes
US6059925A (en) * 1994-11-14 2000-05-09 Aga Aktiebolag Method to regenerate gas mixture in ozone-bleaching process
US6126782A (en) * 1993-12-15 2000-10-03 Mo Och Domsjo Aktiebolag Method for non-chlorine bleaching of cellulose pulp with a totally closed counter-current liquid circuit
US6258208B1 (en) 1994-04-05 2001-07-10 Mo Och Domsjo Aktiebolag Method for complex treatment of pulp in conjunction with a chlorine dioxide stage
WO2001083886A1 (en) * 2000-05-04 2001-11-08 Aga Aktiebolag A process for controlling microbial growth
WO2008028960A1 (en) * 2006-09-08 2008-03-13 Linde Aktiengesellschaft Process for the deresination of pulp and use of carbon dioxide or (bi)carbonate therefor
WO2009003770A1 (en) * 2007-07-03 2009-01-08 Linde Aktiengesellschaft Process for making paper and use of an acid/base treatment in papermaking

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI991241A (fi) 1999-06-01 2000-12-02 Aga Ab Ligniinin valkaisu ja menetelmä paperin valmistamiseksi
US7056419B2 (en) 2002-09-30 2006-06-06 American Air Liquide, Inc. Methods for modifying electrical properties of papermaking compositions using carbon dioxide

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042452A (en) * 1974-09-03 1977-08-16 A. Ahlstrom Osakeyhtio Process for washing cellulose pulp from alkali digestion wherein acid is added to the washing solution

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042452A (en) * 1974-09-03 1977-08-16 A. Ahlstrom Osakeyhtio Process for washing cellulose pulp from alkali digestion wherein acid is added to the washing solution

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT No 1980-18030C & SU,A,670 625 *
DERWENT'S ABSTRACT No 1980-91532C & SU,A,730 913 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5401362A (en) * 1993-03-24 1995-03-28 Kamyr, Inc. Control of metals and dissolved organics in the bleach plant
US5509999A (en) * 1993-03-24 1996-04-23 Kamyr, Inc. Treatment of bleach plant effluents
US6126782A (en) * 1993-12-15 2000-10-03 Mo Och Domsjo Aktiebolag Method for non-chlorine bleaching of cellulose pulp with a totally closed counter-current liquid circuit
US6258208B1 (en) 1994-04-05 2001-07-10 Mo Och Domsjo Aktiebolag Method for complex treatment of pulp in conjunction with a chlorine dioxide stage
US6059925A (en) * 1994-11-14 2000-05-09 Aga Aktiebolag Method to regenerate gas mixture in ozone-bleaching process
WO1999045202A1 (en) * 1998-03-03 1999-09-10 Aga Aktiebolag Improved papermaking processes
AU744905B2 (en) * 1998-03-03 2002-03-07 Aga Aktiebolag Improved papermaking processes
WO2001083886A1 (en) * 2000-05-04 2001-11-08 Aga Aktiebolag A process for controlling microbial growth
WO2008028960A1 (en) * 2006-09-08 2008-03-13 Linde Aktiengesellschaft Process for the deresination of pulp and use of carbon dioxide or (bi)carbonate therefor
WO2009003770A1 (en) * 2007-07-03 2009-01-08 Linde Aktiengesellschaft Process for making paper and use of an acid/base treatment in papermaking

Also Published As

Publication number Publication date
EP0296198A1 (en) 1988-12-28
EP0296198B1 (en) 1991-09-18
DE3773204D1 (xx) 1991-10-24

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