FI971605A0 - Process for treating a bleaching acid and alkaline wastewater separately - Google Patents

Process for treating a bleaching acid and alkaline wastewater separately

Info

Publication number
FI971605A0
FI971605A0 FI971605A FI971605A FI971605A0 FI 971605 A0 FI971605 A0 FI 971605A0 FI 971605 A FI971605 A FI 971605A FI 971605 A FI971605 A FI 971605A FI 971605 A0 FI971605 A0 FI 971605A0
Authority
FI
Finland
Prior art keywords
treating
alkaline wastewater
bleaching acid
wastewater separately
separately
Prior art date
Application number
FI971605A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI971605A (en
Inventor
Johan Landfors
Hans Johansson
Mikael Engstroem
Original Assignee
Eka Chemicals 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 SE9403372A external-priority patent/SE9403372L/en
Priority claimed from SE9502169A external-priority patent/SE9502169D0/en
Application filed by Eka Chemicals Ab filed Critical Eka Chemicals Ab
Publication of FI971605A0 publication Critical patent/FI971605A0/en
Publication of FI971605A publication Critical patent/FI971605A/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
    • D21C9/1026—Other features in bleaching processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
    • B01D5/009—Collecting, removing and/or treatment of the condensate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0042—Fractionating or concentration of spent liquors by special methods

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
FI971605A 1994-10-05 1997-04-16 Method for treating acidic and alkaline waste streams separately from a bleaching plant FI971605A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE9403372A SE9403372L (en) 1994-10-05 1994-10-05 Purification and recirculation of wastewater into a pulp barrel by electrodialysis or evaporation and combustion
US13995P 1995-06-12 1995-06-12
SE9502169A SE9502169D0 (en) 1995-06-14 1995-06-14 Process for purification of process water during pulping
US191495P 1995-06-20 1995-06-20
PCT/SE1995/001121 WO1996011299A1 (en) 1994-10-05 1995-10-03 A method for treating acid and alkaline waste streams from a bleach plant separately

Publications (2)

Publication Number Publication Date
FI971605A0 true FI971605A0 (en) 1997-04-16
FI971605A FI971605A (en) 1997-04-16

Family

ID=26662147

Family Applications (1)

Application Number Title Priority Date Filing Date
FI971605A FI971605A (en) 1994-10-05 1997-04-16 Method for treating acidic and alkaline waste streams separately from a bleaching plant

Country Status (8)

Country Link
EP (1) EP0784721A1 (en)
JP (1) JPH10506964A (en)
AU (1) AU3712195A (en)
BR (1) BR9509188A (en)
CA (1) CA2201117A1 (en)
FI (1) FI971605A (en)
NO (1) NO971504D0 (en)
WO (1) WO1996011299A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792315A (en) * 1995-02-27 1998-08-11 Eka Chemicals Ab Purifying aqueous effluent from a pulp mill using electro chemical membrane device
SE9500732L (en) * 1995-02-27 1996-08-28 Eka Chemicals Ab Procedure for the treatment of liquids
EP0863113A1 (en) * 1997-03-07 1998-09-09 Akzo Nobel N.V. Process for treating wastewater
US6425974B1 (en) 1997-03-07 2002-07-30 Akzo Nobel N.V. Process for treating wastewater from a bleach plant
BR0015207B1 (en) * 1999-11-02 2009-08-11 process for treating waste water from an industrial process for the production of propylene oxide.
FR2809385A1 (en) * 2000-05-26 2001-11-30 Tsb Internat METHOD AND INSTALLATION FOR PURIFICATION AND DESALINATION OF SEA WATER
CN1321070C (en) * 2005-02-03 2007-06-13 刘德沛 Waste water treating method and multi-effect evaporator for propylene oxide production
CN104928963B (en) * 2015-05-08 2017-10-24 白博 A kind of reducing rules pulping waste liquor online high consistency extraction technique of zero-emission

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986951A (en) * 1975-11-18 1976-10-19 Champion International Corporation Chlorine-based bleachery effluent treatment
US4049490A (en) * 1976-02-23 1977-09-20 Veniamin Petrovich Zaplatin Electrodialysis of bleaching effluent
AU619580B2 (en) * 1988-08-23 1992-01-30 Sappi Limited Elimination of bleach effluents
FI85293C (en) * 1990-05-04 1992-03-25 Poeyry Jaakko & Co Oy FOERFARANDE FOER RENING OCH AOTERFOERING AV CELLULOSAFABRIKERS BLEKERIAVATTEN.

Also Published As

Publication number Publication date
NO971504L (en) 1997-04-03
AU3712195A (en) 1996-05-02
CA2201117A1 (en) 1996-04-18
NO971504D0 (en) 1997-04-03
FI971605A (en) 1997-04-16
WO1996011299A1 (en) 1996-04-18
EP0784721A1 (en) 1997-07-23
JPH10506964A (en) 1998-07-07
BR9509188A (en) 1997-12-30

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Legal Events

Date Code Title Description
NF Re-establishment of lapsed right