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SE9301161L - Process for treating process water - Google Patents

Process for treating process water

Info

Publication number
SE9301161L
SE9301161L SE9301161A SE9301161A SE9301161L SE 9301161 L SE9301161 L SE 9301161L SE 9301161 A SE9301161 A SE 9301161A SE 9301161 A SE9301161 A SE 9301161A SE 9301161 L SE9301161 L SE 9301161L
Authority
SE
Sweden
Prior art keywords
process water
treating
water
metal ions
metal compounds
Prior art date
Application number
SE9301161A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9301161D0 (en
Inventor
Ulf Germgaard
Solveig Norden
Original Assignee
Sunds Defibrator Ind 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
Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Priority to SE9301161A priority Critical patent/SE9301161L/en
Publication of SE9301161D0 publication Critical patent/SE9301161D0/en
Priority to AU63876/94A priority patent/AU672501B2/en
Priority to CN94191676A priority patent/CN1120358A/en
Priority to CA002160123A priority patent/CA2160123A1/en
Priority to EP94911328A priority patent/EP0693144A1/en
Priority to PCT/SE1994/000130 priority patent/WO1994023122A1/en
Priority to JP6521969A priority patent/JPH08508546A/en
Priority to NZ263264A priority patent/NZ263264A/en
Priority to BR9406105A priority patent/BR9406105A/en
Priority to ZA941235A priority patent/ZA941235B/en
Publication of SE9301161L publication Critical patent/SE9301161L/en
Priority to FI954766A priority patent/FI954766A/en
Priority to NO953993A priority patent/NO953993D0/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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • D21C11/0028—Effluents derived from the washing or bleaching plants
    • 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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Removal Of Specific Substances (AREA)
  • Paper (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Physical Water Treatments (AREA)

Abstract

A method of treating process water containing metal ions in connection with bleaching pulp of ligno-cellulose-containing material. The process water is brought into contact with an alkaline liquid, which preferably also contains sulphide, whereby metal ions precipitate in the form of difficultly soluble metal compounds. The precipitated metal compounds thereafter are separated from the process water.
SE9301161A 1993-04-07 1993-04-07 Process for treating process water SE9301161L (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
SE9301161A SE9301161L (en) 1993-04-07 1993-04-07 Process for treating process water
BR9406105A BR9406105A (en) 1993-04-07 1994-02-17 Process water treatment method containing metal ions relative to the bleaching of pulp of material containing ligno-cellulose
EP94911328A EP0693144A1 (en) 1993-04-07 1994-02-17 Method of treating process water
CN94191676A CN1120358A (en) 1993-04-07 1994-02-17 Method of treating process water
CA002160123A CA2160123A1 (en) 1993-04-07 1994-02-17 Method of treating process water
AU63876/94A AU672501B2 (en) 1993-04-07 1994-02-17 Method of treating process water
PCT/SE1994/000130 WO1994023122A1 (en) 1993-04-07 1994-02-17 Method of treating process water
JP6521969A JPH08508546A (en) 1993-04-07 1994-02-17 Process water treatment method
NZ263264A NZ263264A (en) 1993-04-07 1994-02-17 Removal of metal ions from process water for bleaching pulp, comprising contacting with alkali and precipitation of low solubility metal compounds
ZA941235A ZA941235B (en) 1993-04-07 1994-02-23 Method of treating process water
FI954766A FI954766A (en) 1993-04-07 1995-10-06 Process water treatment method
NO953993A NO953993D0 (en) 1993-04-07 1995-10-06 Process water treatment process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9301161A SE9301161L (en) 1993-04-07 1993-04-07 Process for treating process water

Publications (2)

Publication Number Publication Date
SE9301161D0 SE9301161D0 (en) 1993-04-07
SE9301161L true SE9301161L (en) 1994-10-08

Family

ID=20389509

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9301161A SE9301161L (en) 1993-04-07 1993-04-07 Process for treating process water

Country Status (12)

Country Link
EP (1) EP0693144A1 (en)
JP (1) JPH08508546A (en)
CN (1) CN1120358A (en)
AU (1) AU672501B2 (en)
BR (1) BR9406105A (en)
CA (1) CA2160123A1 (en)
FI (1) FI954766A (en)
NO (1) NO953993D0 (en)
NZ (1) NZ263264A (en)
SE (1) SE9301161L (en)
WO (1) WO1994023122A1 (en)
ZA (1) ZA941235B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9301160L (en) * 1992-08-28 1994-03-01 Sunds Defibrator Ind Ab Process for treating process water
SE504424C2 (en) * 1994-11-04 1997-02-10 Kvaerner Pulping Tech Ways to precipitate transition metals and alkaline earth metals from bleaching liquids by adding alkaline liquid
SE9500732L (en) * 1995-02-27 1996-08-28 Eka Chemicals Ab Procedure for the treatment of liquids
US5792315A (en) * 1995-02-27 1998-08-11 Eka Chemicals Ab Purifying aqueous effluent from a pulp mill using electro chemical membrane device
SE9803384L (en) * 1998-03-02 1999-09-03 Kemira Kemi Ab Process for treating process water
EA201170846A1 (en) * 2008-12-19 2012-01-30 Ксилеко, Инк. BIOMASS PROCESSING
US20100263813A1 (en) * 2009-04-21 2010-10-21 Andritz Inc. Green liquor pretreatment of lignocellulosic material
WO2013040747A1 (en) * 2011-09-19 2013-03-28 北京沃特玛德环境技术股份有限公司 Method for comprehensively utilizing solid waste during soda recovery in papermaking industry

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4684472A (en) * 1985-12-26 1987-08-04 Phillips Petroleum Company Precipitation of waste chromium compounds utilizing an aqueous sulfide solution
DE58902905D1 (en) * 1989-04-28 1993-01-14 Siemens Ag METHOD FOR REMOVING COPPER FROM WASTEWATER.
US5120448A (en) * 1990-09-19 1992-06-09 Dorica Josesph G Removal of aox frm bleach plant mill effluents by ph shift using the alkalinity/acidity sources available at the mill
EP0564443A1 (en) * 1992-03-15 1993-10-06 Kamyr, Inc. Treatment of bleach plant filtrates

Also Published As

Publication number Publication date
SE9301161D0 (en) 1993-04-07
FI954766A0 (en) 1995-10-06
CN1120358A (en) 1996-04-10
ZA941235B (en) 1994-09-20
JPH08508546A (en) 1996-09-10
FI954766A (en) 1995-10-06
EP0693144A1 (en) 1996-01-24
WO1994023122A1 (en) 1994-10-13
NO953993L (en) 1995-10-06
CA2160123A1 (en) 1994-10-13
AU672501B2 (en) 1996-10-03
NZ263264A (en) 1996-08-27
BR9406105A (en) 1995-12-12
AU6387694A (en) 1994-10-24
NO953993D0 (en) 1995-10-06

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