FI20030522A - Purification of alkaline washing liquid - Google Patents

Purification of alkaline washing liquid Download PDF

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Publication number
FI20030522A
FI20030522A FI20030522A FI20030522A FI20030522A FI 20030522 A FI20030522 A FI 20030522A FI 20030522 A FI20030522 A FI 20030522A FI 20030522 A FI20030522 A FI 20030522A FI 20030522 A FI20030522 A FI 20030522A
Authority
FI
Finland
Prior art keywords
flow
washing liquid
washer
part flow
pulp
Prior art date
Application number
FI20030522A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20030522A0 (en
FI115977B2 (en
FI115977B (en
Inventor
Pasi Pigg
Hannu Sonni
Marjo Toeroenen
Original Assignee
Stora Enso Oyj
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8565931&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI20030522(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Stora Enso Oyj filed Critical Stora Enso Oyj
Priority to FI20030522A priority Critical patent/FI115977B2/en
Publication of FI20030522A0 publication Critical patent/FI20030522A0/en
Priority to JP2006505631A priority patent/JP2006522235A/en
Priority to DE602004003573T priority patent/DE602004003573T2/en
Priority to ES04725953T priority patent/ES2278312T3/en
Priority to PCT/FI2004/000210 priority patent/WO2004090225A1/en
Priority to US10/552,435 priority patent/US20070039702A1/en
Priority to AT04725953T priority patent/ATE347636T1/en
Priority to EP04725953A priority patent/EP1611281B1/en
Publication of FI20030522A publication Critical patent/FI20030522A/en
Publication of FI115977B publication Critical patent/FI115977B/en
Application granted granted Critical
Publication of FI115977B2 publication Critical patent/FI115977B2/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
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Physical Water Treatments (AREA)
  • Detergent Compositions (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

A method for washing sulphate cellulose pulp in the washing department of a sulphate cellulose mill, in which method a first pulp flow ( 1 ) is conducted to a first washer ( 101 ), where a washing liquid ( 12 ) is combined with the first pulp flow ( 1 ). A second pulp flow ( 2 ) is conducted from the first washer ( 101 ) to a second washer ( 102 ), where a washing liquid ( 3 ) is combined with the second pulp flow ( 2 ). The washed pulp flow ( 5 ) is proceeded from the second washer ( 102 ) in the process and the filtrate ( 4 ) displaced by the washing liquid ( 3 ) is recycled to the process so that the filtrate ( 4 ) displaced by the washing liquid ( 3 ) in the second washer ( 102 ) is divided into a first part flow ( 6 ) and a second part flow ( 7 ) and the pH of the second part flow ( 7 ) is dropped by combining an acidifier ( 8 ) with the second part flow ( 7 ). The acidified part flow ( 9 ) is conducted to a process unit ( 103 ), where sludge ( 10 ) containing extractives and metals is separated from the part flow ( 9 ) and the entire process and the part flow ( 11 ) treated in the process unit ( 103 ) is combined with the first part flow ( 6 ) and is recycled to the process for use as the washing liquid ( 12 ) in the first washer ( 101 ).
FI20030522A 2003-04-07 2003-04-07 Purification of alkaline washing liquid FI115977B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FI20030522A FI115977B2 (en) 2003-04-07 2003-04-07 Purification of alkaline washing liquid
EP04725953A EP1611281B1 (en) 2003-04-07 2004-04-06 Purification of alkaline washing liquid
ES04725953T ES2278312T3 (en) 2003-04-07 2004-04-06 PURIFICATION OF LIQUID ALCALINO DE LAVADO.
DE602004003573T DE602004003573T2 (en) 2003-04-07 2004-04-06 CLEANING ALKALIC WASHING LIQUID
JP2006505631A JP2006522235A (en) 2003-04-07 2004-04-06 Purification of alkaline cleaning liquid
PCT/FI2004/000210 WO2004090225A1 (en) 2003-04-07 2004-04-06 Purification of alkaline washing liquid
US10/552,435 US20070039702A1 (en) 2003-04-07 2004-04-06 Purification of alkaline washing liquid
AT04725953T ATE347636T1 (en) 2003-04-07 2004-04-06 CLEANING ALKALINE WASHING LIQUID

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20030522 2003-04-07
FI20030522A FI115977B2 (en) 2003-04-07 2003-04-07 Purification of alkaline washing liquid

Publications (4)

Publication Number Publication Date
FI20030522A0 FI20030522A0 (en) 2003-04-07
FI20030522A true FI20030522A (en) 2004-10-08
FI115977B FI115977B (en) 2005-08-31
FI115977B2 FI115977B2 (en) 2019-03-29

Family

ID=8565931

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20030522A FI115977B2 (en) 2003-04-07 2003-04-07 Purification of alkaline washing liquid

Country Status (8)

Country Link
US (1) US20070039702A1 (en)
EP (1) EP1611281B1 (en)
JP (1) JP2006522235A (en)
AT (1) ATE347636T1 (en)
DE (1) DE602004003573T2 (en)
ES (1) ES2278312T3 (en)
FI (1) FI115977B2 (en)
WO (1) WO2004090225A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4825709B2 (en) * 2007-03-15 2011-11-30 三菱製紙株式会社 Foaming and pitch trouble suppression method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5509999A (en) * 1993-03-24 1996-04-23 Kamyr, Inc. Treatment of bleach plant effluents
US5489363A (en) * 1993-05-04 1996-02-06 Kamyr, Inc. Pulping with low dissolved solids for improved pulp strength
SE9303762L (en) * 1993-11-15 1995-05-16 Eka Nobel Ab Ways to purify process water from pulp production
FI990127A0 (en) * 1999-01-22 1999-01-22 Ahlstrom Machinery Oy Process for treating pulp
SE519342C2 (en) * 1999-10-25 2003-02-18 Andritz Oy Pulping process with recirculation of filtrate from washing step, involves temperature conditioning the mixture of soap and filtrate before separating the soap from the filtrate
US6752903B2 (en) * 2001-07-27 2004-06-22 Craig A. Bianchini Method for mitigating the interference caused by high-molecular weight by-products in pulping processes

Also Published As

Publication number Publication date
ATE347636T1 (en) 2006-12-15
ES2278312T3 (en) 2007-08-01
DE602004003573T2 (en) 2007-09-27
FI20030522A0 (en) 2003-04-07
US20070039702A1 (en) 2007-02-22
FI115977B2 (en) 2019-03-29
FI115977B (en) 2005-08-31
JP2006522235A (en) 2006-09-28
DE602004003573D1 (en) 2007-01-18
EP1611281B1 (en) 2006-12-06
EP1611281A1 (en) 2006-01-04
WO2004090225A1 (en) 2004-10-21

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