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SE9900143D0 - Procedure for the treatment of white liquor - Google Patents

Procedure for the treatment of white liquor

Info

Publication number
SE9900143D0
SE9900143D0 SE9900143A SE9900143A SE9900143D0 SE 9900143 D0 SE9900143 D0 SE 9900143D0 SE 9900143 A SE9900143 A SE 9900143A SE 9900143 A SE9900143 A SE 9900143A SE 9900143 D0 SE9900143 D0 SE 9900143D0
Authority
SE
Sweden
Prior art keywords
white liquor
sodium
procedure
treatment
oxidising
Prior art date
Application number
SE9900143A
Other languages
Swedish (sv)
Other versions
SE513403C2 (en
SE9900143L (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 SE9900143A priority Critical patent/SE513403C2/en
Publication of SE9900143D0 publication Critical patent/SE9900143D0/en
Priority to FI20011551A priority patent/FI20011551A7/en
Priority to PCT/SE2000/000007 priority patent/WO2000044978A1/en
Priority to AU23350/00A priority patent/AU2335000A/en
Publication of SE9900143L publication Critical patent/SE9900143L/en
Publication of SE513403C2 publication Critical patent/SE513403C2/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
    • D21C11/0078—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
    • 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

Landscapes

  • Paper (AREA)

Abstract

The present invention relates to a process for treating white liquor in pulp and paper mills, the process comprising oxidation of white liquor. According to the invention, white liquor, which mainly contains sodium sulphide, sodium hydroxide and water, is first 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.
SE9900143A 1999-01-18 1999-01-18 Procedure for oxidizing white liquor SE513403C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9900143A SE513403C2 (en) 1999-01-18 1999-01-18 Procedure for oxidizing white liquor
FI20011551A FI20011551A7 (en) 1999-01-18 2000-01-04 Method for oxidizing white liquor
PCT/SE2000/000007 WO2000044978A1 (en) 1999-01-18 2000-01-04 Process for oxidising white liquor
AU23350/00A AU2335000A (en) 1999-01-18 2000-01-04 Process for oxidising white liquor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9900143A SE513403C2 (en) 1999-01-18 1999-01-18 Procedure for oxidizing white liquor

Publications (3)

Publication Number Publication Date
SE9900143D0 true SE9900143D0 (en) 1999-01-18
SE9900143L SE9900143L (en) 2000-07-19
SE513403C2 SE513403C2 (en) 2000-09-11

Family

ID=20414142

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9900143A SE513403C2 (en) 1999-01-18 1999-01-18 Procedure for oxidizing white liquor

Country Status (4)

Country Link
AU (1) AU2335000A (en)
FI (1) FI20011551A7 (en)
SE (1) SE513403C2 (en)
WO (1) WO2000044978A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020002446A1 (en) 2020-04-23 2021-10-28 Messer Austria Gmbh Process and device for white liquor oxidation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5382322A (en) * 1991-10-18 1995-01-17 Air Products And Chemicals, Inc. Selective white liquor oxidation
WO1994001616A1 (en) * 1992-07-09 1994-01-20 Kamyr, Inc. White liquor oxidation for bleach plant use
US5439556A (en) * 1993-08-16 1995-08-08 The Boc Group, Inc. Oxidation of white liquor using a packing column

Also Published As

Publication number Publication date
SE513403C2 (en) 2000-09-11
WO2000044978A1 (en) 2000-08-03
FI20011551L (en) 2001-07-17
AU2335000A (en) 2000-08-18
SE9900143L (en) 2000-07-19
FI20011551A7 (en) 2001-07-17

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Legal Events

Date Code Title Description
NUG Patent has lapsed