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
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.)
Ceased
Application number
PCT/SE1987/000623
Other languages
English (en)
French (fr)
Inventor
Monica BOKSTRÖM
Raimo Rasimus
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.)
Linde Sverige AB
Original Assignee
AGA AB
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 AB filed Critical AGA AB
Priority to AT88900488T priority Critical patent/ATE67536T1/de
Priority to BR8707606A priority patent/BR8707606A/pt
Priority to JP63501165A priority patent/JPH0778315B2/ja
Publication of WO1988004706A1 publication Critical patent/WO1988004706A1/en
Priority to NO883736A priority patent/NO172550C/no
Priority to FI883851A priority patent/FI90256C/fi
Anticipated expiration legal-status Critical
Ceased 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
    • D21C9/02—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 Ceased WO1988004706A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT88900488T ATE67536T1 (de) 1986-12-22 1987-12-21 Verfahren zum waschen einer alkalischen pulpe.
BR8707606A BR8707606A (pt) 1986-12-22 1987-12-21 Processo para lavagem de polpa alcalina
JP63501165A JPH0778315B2 (ja) 1986-12-22 1987-12-21 アルカリ法パルプの洗浄方法
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
SEPCT/SE87/00198 1987-04-16
PCT/SE1987/000198 WO1988004705A1 (en) 1986-12-22 1987-04-16 Method for washing of alcaline pulp

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 Ceased WO1988004706A1 (en) 1986-12-22 1987-12-21 Method for washing of alcaline pulp

Country Status (3)

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

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
FI991241L (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
DE3773204D1 (cs) 1991-10-24
EP0296198B1 (en) 1991-09-18
EP0296198A1 (en) 1988-12-28

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