CA2163368A1 - Production of white liquor - Google Patents
Production of white liquorInfo
- Publication number
- CA2163368A1 CA2163368A1 CA002163368A CA2163368A CA2163368A1 CA 2163368 A1 CA2163368 A1 CA 2163368A1 CA 002163368 A CA002163368 A CA 002163368A CA 2163368 A CA2163368 A CA 2163368A CA 2163368 A1 CA2163368 A1 CA 2163368A1
- Authority
- CA
- Canada
- Prior art keywords
- white liquor
- liquor
- sulphidity
- smelt
- calcium sulphide
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- AGVJBLHVMNHENQ-UHFFFAOYSA-N Calcium sulfide Chemical compound [S-2].[Ca+2] AGVJBLHVMNHENQ-UHFFFAOYSA-N 0.000 abstract 4
- 241001062472 Stokellia anisodon Species 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 3
- 239000007787 solid Substances 0.000 abstract 3
- 239000000126 substance Substances 0.000 abstract 3
- 239000000243 solution Substances 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 1
Abstract
A method of producing white liquor having enhanced and/or reduced sulphidity in the recovery of chemicals in a sulphate pulp process is described. In the method one starts from a calcium sulphide rich smelt of inorganic chemicals, which has been obtained by simultaneous combustion of black liquor and processing of lime sludge. This smelt is treated with an aqueous solution, whereupon the calcium sulphide in the smelt is present in a solid form and the rest of the chemicals are in solution. Thereupon the solid calcium sulphide is separated and the obtained solution is processed as a green liquor in per se known manner to a white liquor having reduced sulphidity, whereupon optionally the separated solid calcium sulphide is mixed with the required amount of white liquor to a white liquor having enhanced sulphidity.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9301921-4 | 1993-06-04 | ||
| SE9301921A SE501347C2 (en) | 1993-06-04 | 1993-06-04 | Preparation of white liquor with elevated and / or reduced sulphidity |
| PCT/SE1994/000537 WO1994029516A1 (en) | 1993-06-04 | 1994-06-03 | Production of white liquor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2163368A1 true CA2163368A1 (en) | 1994-12-22 |
| CA2163368C CA2163368C (en) | 2006-02-07 |
Family
ID=35890341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002163368A Expired - Fee Related CA2163368C (en) | 1993-06-04 | 1994-06-03 | Production of white liquor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2163368C (en) |
-
1994
- 1994-06-03 CA CA002163368A patent/CA2163368C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2163368C (en) | 2006-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130604 |