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BR9509188A - Process for the separate treatment of acid and alkaline residual currents in a bleaching plant - Google Patents

Process for the separate treatment of acid and alkaline residual currents in a bleaching plant

Info

Publication number
BR9509188A
BR9509188A BR9509188A BR9509188A BR9509188A BR 9509188 A BR9509188 A BR 9509188A BR 9509188 A BR9509188 A BR 9509188A BR 9509188 A BR9509188 A BR 9509188A BR 9509188 A BR9509188 A BR 9509188A
Authority
BR
Brazil
Prior art keywords
acid
separate treatment
residual currents
bleaching plant
alkaline residual
Prior art date
Application number
BR9509188A
Other languages
Portuguese (pt)
Inventor
Johan Landfors
Hans Johansson
Mikael Engstrom
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 BR9509188A publication Critical patent/BR9509188A/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)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wood Science & Technology (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Paper (AREA)
BR9509188A 1994-10-05 1995-10-03 Process for the separate treatment of acid and alkaline residual currents in a bleaching plant BR9509188A (en)

Applications Claiming Priority (3)

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
SE9502169A SE9502169D0 (en) 1995-06-14 1995-06-14 Process for purification of process water during pulping
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 (1)

Publication Number Publication Date
BR9509188A true BR9509188A (en) 1997-12-30

Family

ID=26662147

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9509188A BR9509188A (en) 1994-10-05 1995-10-03 Process for the separate treatment of acid and alkaline residual currents in 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) FI971605L (en)
NO (1) NO971504L (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
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
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
EP1230169B1 (en) * 1999-11-02 2003-07-30 Shell Internationale Researchmaatschappij B.V. Process for the purification of industrial waste water from a propylene oxide production process
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
FI893844A7 (en) * 1988-08-23 1990-02-24 Sappi Ltd ELIMINERING AV BLEKNINGSAVLOPPSVAETSKOR.
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
FI971605A0 (en) 1997-04-16
CA2201117A1 (en) 1996-04-18
AU3712195A (en) 1996-05-02
JPH10506964A (en) 1998-07-07
FI971605A7 (en) 1997-04-16
NO971504D0 (en) 1997-04-03
FI971605L (en) 1997-04-16
EP0784721A1 (en) 1997-07-23
NO971504L (en) 1997-04-03
WO1996011299A1 (en) 1996-04-18

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Legal Events

Date Code Title Description
FF Decision: intention to grant
FA11 Dismissal: dismissal - article 38, par. 2 of industrial property law