CA2219550A1 - A method of recovery of chemical compounds from a pulp mill - Google Patents
A method of recovery of chemical compounds from a pulp millInfo
- Publication number
- CA2219550A1 CA2219550A1 CA 2219550 CA2219550A CA2219550A1 CA 2219550 A1 CA2219550 A1 CA 2219550A1 CA 2219550 CA2219550 CA 2219550 CA 2219550 A CA2219550 A CA 2219550A CA 2219550 A1 CA2219550 A1 CA 2219550A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp mill
- mill recovery
- cycle
- recovery
- chemical compounds
- 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
- 238000011084 recovery Methods 0.000 title abstract 5
- 150000001875 compounds Chemical class 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 2
- 238000002425 crystallisation Methods 0.000 abstract 2
- 230000008025 crystallization Effects 0.000 abstract 2
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 2
- 235000011152 sodium sulphate Nutrition 0.000 abstract 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000012452 mother liquor Substances 0.000 abstract 1
- 229910052700 potassium Inorganic materials 0.000 abstract 1
- 239000011591 potassium Substances 0.000 abstract 1
- 239000012716 precipitator Substances 0.000 abstract 1
- 238000010926 purge Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Paper (AREA)
Abstract
The build up of unwanted components, particularly potassium and chloride values, in pulp mill recovery cycles is avoided by processing pulp mill recovery cycle precipitator ash. The ash first is dissolved in water and the aqueous solution then is evaporated to crystallize sodium sulfate, which then can be returned to the pulp mill recovery cycle. The mother liquor from such crystallization is subjected to extractive crystallization to recover further quantities of crystalline sodium sulfate for return to the pulp mill recovery cycle. The purge stream containing chloride values is removed from the cycle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3027096P | 1996-11-01 | 1996-11-01 | |
| US60/030,270 | 1996-11-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2219550A1 true CA2219550A1 (en) | 1998-05-01 |
| CA2219550C CA2219550C (en) | 2008-05-06 |
Family
ID=21853394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2219550 Expired - Lifetime CA2219550C (en) | 1996-11-01 | 1997-10-29 | A method of recovery of chemical compounds from a pulp mill |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2219550C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432038A (en) * | 2011-10-09 | 2012-05-02 | 中国海诚工程科技股份有限公司 | Method and device for removing chlorine and potassium ions in fly ash produced by alkali recovery furnace and recovering sulfate radical |
| CN103159235A (en) * | 2011-10-09 | 2013-06-19 | 中国海诚工程科技股份有限公司 | Method for removing chlorine and potassium ions and recycling sulfate radicals in flying ash in soda recovery furnace |
| WO2016099392A1 (en) * | 2014-12-17 | 2016-06-23 | Aprotech Engineering Ab | Process for production of a fertilizer comprising potassium sulfate |
| WO2019058032A1 (en) * | 2017-09-25 | 2019-03-28 | Andritz Oy | Method of controlling the chemical balance of a pulp mill |
-
1997
- 1997-10-29 CA CA 2219550 patent/CA2219550C/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432038A (en) * | 2011-10-09 | 2012-05-02 | 中国海诚工程科技股份有限公司 | Method and device for removing chlorine and potassium ions in fly ash produced by alkali recovery furnace and recovering sulfate radical |
| CN103159235A (en) * | 2011-10-09 | 2013-06-19 | 中国海诚工程科技股份有限公司 | Method for removing chlorine and potassium ions and recycling sulfate radicals in flying ash in soda recovery furnace |
| CN102432038B (en) * | 2011-10-09 | 2013-07-17 | 中国海诚工程科技股份有限公司 | Method and device for removing chlorine and potassium ions in fly ash produced by alkali recovery furnace and recovering sulfate radical |
| CN103159235B (en) * | 2011-10-09 | 2014-09-24 | 中国海诚工程科技股份有限公司 | Method for removing chlorine and potassium ions and recycling sulfate radicals in flying ash in soda recovery furnace |
| WO2016099392A1 (en) * | 2014-12-17 | 2016-06-23 | Aprotech Engineering Ab | Process for production of a fertilizer comprising potassium sulfate |
| WO2019058032A1 (en) * | 2017-09-25 | 2019-03-28 | Andritz Oy | Method of controlling the chemical balance of a pulp mill |
| CN111212945A (en) * | 2017-09-25 | 2020-05-29 | 安德里兹公司 | Method for controlling chemical equilibrium of pulp mill |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2219550C (en) | 2008-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20171030 |