SE9900144D0 - Procedure for the treatment of white liquor - Google Patents

Procedure for the treatment of white liquor

Info

Publication number
SE9900144D0
SE9900144D0 SE9900144A SE9900144A SE9900144D0 SE 9900144 D0 SE9900144 D0 SE 9900144D0 SE 9900144 A SE9900144 A SE 9900144A SE 9900144 A SE9900144 A SE 9900144A SE 9900144 D0 SE9900144 D0 SE 9900144D0
Authority
SE
Sweden
Prior art keywords
white liquor
sodium
oxidising
contacted
stage
Prior art date
Application number
SE9900144A
Other languages
Swedish (sv)
Other versions
SE9900144L (en
SE514596C2 (en
Inventor
Anette Olsson
Christos Rampotas
Viveka Svensson
Niclas Oejstedt
Original Assignee
Kemira Kemi 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 Kemira Kemi Ab filed Critical Kemira Kemi Ab
Priority to SE9900144A priority Critical patent/SE514596C2/en
Publication of SE9900144D0 publication Critical patent/SE9900144D0/en
Priority to PCT/SE2000/000008 priority patent/WO2000044979A1/en
Priority to AU23351/00A priority patent/AU2335100A/en
Publication of SE9900144L publication Critical patent/SE9900144L/en
Publication of SE514596C2 publication Critical patent/SE514596C2/en
Priority to FI20011552A priority patent/FI20011552A/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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • D21C11/0071—Treatment of green or white liquors with gases, e.g. with carbon dioxide for carbonation; Expulsion of gaseous compounds, e.g. hydrogen sulfide, from these liquors by this treatment (stripping); Optional separation of solid compounds formed in the liquors by this treatment
    • 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
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • D21C11/0078—Treatment of green or white liquors with other means or other compounds than gases, e.g. in order to separate solid compounds such as sodium chloride and carbonate from these liquors; Further treatment of these compounds

Landscapes

  • Paper (AREA)

Abstract

The present invention relates to a process for treating white liquor, which apart from mainly sodium sulphide, sodium hydroxide and water, also contains ions of transition metals and/or alkaline earth metals, in pulp and paper mills. According to the invention, the white liquor is treated on the one hand in a stage a), in which the white liquor is oxidised by first being contacted with an oxygen-containing gas for oxidising sodium sulphide to sodium thiosulphate, after which the white liquor is contacted with hydrogen peroxide for oxidising sodium thiosulphate to sodium sulphate, and, on the other hand, in a stage b), in which a magnesium salt is added to the white liquor and the formed precipitate is separated from the white liquor, the stages a) and b) being carried out in an optional order.
SE9900144A 1999-01-18 1999-01-18 Procedure for the treatment of white liquor to minimize the enrichment of metals SE514596C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9900144A SE514596C2 (en) 1999-01-18 1999-01-18 Procedure for the treatment of white liquor to minimize the enrichment of metals
PCT/SE2000/000008 WO2000044979A1 (en) 1999-01-18 2000-01-04 Process for the treatment of white liquor
AU23351/00A AU2335100A (en) 1999-01-18 2000-01-04 Process for the treatment of white liquor
FI20011552A FI20011552A (en) 1999-01-18 2001-07-17 Procedure for the treatment of white liquor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9900144A SE514596C2 (en) 1999-01-18 1999-01-18 Procedure for the treatment of white liquor to minimize the enrichment of metals

Publications (3)

Publication Number Publication Date
SE9900144D0 true SE9900144D0 (en) 1999-01-18
SE9900144L SE9900144L (en) 2000-07-19
SE514596C2 SE514596C2 (en) 2001-03-19

Family

ID=20414143

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9900144A SE514596C2 (en) 1999-01-18 1999-01-18 Procedure for the treatment of white liquor to minimize the enrichment of metals

Country Status (4)

Country Link
AU (1) AU2335100A (en)
FI (1) FI20011552A (en)
SE (1) SE514596C2 (en)
WO (1) WO2000044979A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022193294A1 (en) * 2021-03-19 2022-09-22 Kemira Oyj A method for removing metal ions from effluents and process waters

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU473185B2 (en) * 1973-07-25 1976-06-17 Mooch Domsjo Aktiebolag A method for producing oxidized white liquor
US5382322A (en) * 1991-10-18 1995-01-17 Air Products And Chemicals, Inc. Selective white liquor oxidation
US5639347A (en) * 1993-03-24 1997-06-17 Ahlstrom Machinery Inc. Method of controlling of metals in a bleach plant, using oxidation
US5700350A (en) * 1996-03-28 1997-12-23 Chemetics International Company Ltd. Processes of retaining chelant-containing effluent within pulp bleach plants

Also Published As

Publication number Publication date
SE9900144L (en) 2000-07-19
SE514596C2 (en) 2001-03-19
AU2335100A (en) 2000-08-18
FI20011552A (en) 2001-07-17
WO2000044979A1 (en) 2000-08-03

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