SE9400383L - Ways to purify a sulphide-containing alkaline liquor from chloride - Google Patents
Ways to purify a sulphide-containing alkaline liquor from chlorideInfo
- 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
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.
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)
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)
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 |
-
1994
- 1994-02-07 SE SE9400383A patent/SE9400383L/en not_active Application Discontinuation
-
1995
- 1995-01-23 AU AU17215/95A patent/AU1721595A/en not_active Abandoned
- 1995-01-23 CA CA 2181584 patent/CA2181584A1/en not_active Abandoned
- 1995-01-23 WO PCT/SE1995/000059 patent/WO1995021291A1/en not_active Application Discontinuation
- 1995-01-23 EP EP95909161A patent/EP0745155A1/en not_active Withdrawn
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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