SE9400383L - Ways to purify a sulphide-containing alkaline liquor from chloride - Google Patents

Ways to purify a sulphide-containing alkaline liquor from chloride

Info

Publication number
SE9400383L
SE9400383L SE9400383A SE9400383A SE9400383L SE 9400383 L SE9400383 L SE 9400383L SE 9400383 A SE9400383 A SE 9400383A SE 9400383 A SE9400383 A SE 9400383A SE 9400383 L SE9400383 L SE 9400383L
Authority
SE
Sweden
Prior art keywords
gas
liquid
sulphide
contact zone
chloride
Prior art date
Application number
SE9400383A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9400383D0 (en
Inventor
Lars Stigsson
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE9400383A priority Critical patent/SE9400383L/en
Publication of SE9400383D0 publication Critical patent/SE9400383D0/en
Priority to PCT/SE1995/000059 priority patent/WO1995021291A1/en
Priority to EP95909161A priority patent/EP0745155A1/en
Priority to AU17215/95A priority patent/AU1721595A/en
Priority to CA 2181584 priority patent/CA2181584A1/en
Publication of SE9400383L publication Critical patent/SE9400383L/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

Landscapes

  • Paper (AREA)

Abstract

A process for separating off chloride from a sulphide-containing alkaline liquor which is obtained in association with the production of chemical pulp. According to the invention, the liquor is contacted, in a first gas/liquid contact zone, by a carbon dioxide-containing gas, the carbon dioxide partial pressure of which exceeds 0.2 atm, in order to obtain an alkaline liquid which contains dissolved alkali hydrogen carbonate and chloride compounds and which is drawn off and transferred to a second gas/liquid contact zone, in which a lower pressure is maintained than in the first gas/liquid contact zone, in order to obtain an alkaline liquid which contains alkali carbonate and chloride compounds, and hydrogen sulphide which is driven off. From the second gas/liquid contact zone are drawn off, firstly, alkaline liquid containing alkali carbonate and chloride compounds, which is transferred to the first gas/liquid contact zone, and, secondly, alkaline, and in the main sulphide-free, liquid which contains alkali carbonate and chloride compounds and which is transferred to a system for separating off chloride compounds.
SE9400383A 1994-02-07 1994-02-07 Ways to purify a sulphide-containing alkaline liquor from chloride SE9400383L (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9400383A SE9400383L (en) 1994-02-07 1994-02-07 Ways to purify a sulphide-containing alkaline liquor from chloride
PCT/SE1995/000059 WO1995021291A1 (en) 1994-02-07 1995-01-23 Process for separating off chloride from sulphide-containing alkaline liquor
EP95909161A EP0745155A1 (en) 1994-02-07 1995-01-23 Process for separating off chloride from sulphide-containing alkaline liquor
AU17215/95A AU1721595A (en) 1994-02-07 1995-01-23 Process for separating off chloride from sulphide-containing alkaline liquor
CA 2181584 CA2181584A1 (en) 1994-02-07 1995-01-23 Process for separating off chloride from sulphide-containing alkaline liquor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9400383A SE9400383L (en) 1994-02-07 1994-02-07 Ways to purify a sulphide-containing alkaline liquor from chloride

Publications (2)

Publication Number Publication Date
SE9400383D0 SE9400383D0 (en) 1994-02-07
SE9400383L true SE9400383L (en) 1995-08-08

Family

ID=20392823

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9400383A SE9400383L (en) 1994-02-07 1994-02-07 Ways to purify a sulphide-containing alkaline liquor from chloride

Country Status (5)

Country Link
EP (1) EP0745155A1 (en)
AU (1) AU1721595A (en)
CA (1) CA2181584A1 (en)
SE (1) SE9400383L (en)
WO (1) WO1995021291A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI122237B (en) * 2007-06-15 2011-10-31 Andritz Oy A method for treating fluid flows at a pulp mill
AT514010B1 (en) * 2013-02-26 2015-02-15 Mondi Ag Process for causticizing green liquor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841561A (en) * 1954-03-12 1958-07-01 Rayonier Inc Recovery of chemicals from smelt solutions
US3210235A (en) * 1963-04-08 1965-10-05 Scott Paper Co Pulping of cellulose materials in the presence of free sulfur in a kraft pulping system and cyclic liquor recovery therefor
US3650888A (en) * 1970-06-11 1972-03-21 Combustion Eng Pollution controlled polysulfide recovery process
SE434860B (en) * 1976-11-15 1984-08-20 Mo Och Domsjoe Ab PROCEDURE FOR EXPOSURE OF CHLORIDES FROM CHEMICALS RECOVERY SYSTEMS BY SODIUM-BASED PREPARATION PROCESSES
FI67732C (en) * 1982-10-20 1985-05-10 Tampella Oy Ab SAETT ATT AOTERVINNA KEMIKALIER FRAON KLORIDHALTIG GROENLUT

Also Published As

Publication number Publication date
CA2181584A1 (en) 1995-08-10
AU1721595A (en) 1995-08-21
WO1995021291A1 (en) 1995-08-10
EP0745155A1 (en) 1996-12-04
SE9400383D0 (en) 1994-02-07

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