GB1441422A - Process for working up the wash solution obtained in the washing ofso2-containing gas with aqueous ammonium sulphite solution - Google Patents
Process for working up the wash solution obtained in the washing ofso2-containing gas with aqueous ammonium sulphite solutionInfo
- Publication number
- GB1441422A GB1441422A GB5396973A GB5396973A GB1441422A GB 1441422 A GB1441422 A GB 1441422A GB 5396973 A GB5396973 A GB 5396973A GB 5396973 A GB5396973 A GB 5396973A GB 1441422 A GB1441422 A GB 1441422A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- sulphuric acid
- wash solution
- reaction gas
- gas
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Detergent Compositions (AREA)
Abstract
1441422 Sulphur dioxide removal DAVY POWERGAS GmbH 21 Nov 1973 [22 Nov 1972] 53969/73 Addition to 1376404 Heading C1A Sulphur dioxide is removed from an off-gas by washing with an aqueous solution containing ammonium sulphite and the resulting wash solution is worked up by evaporating the solution, by direct heat exchange with hot reaction gas from the second stage of the process, down to a water content of between 15 and 55 wt. per cent, decompositing the concentrated mixture at a temperature of from 900-1250‹ C. with simultaneous combustion of a carbon- and/or sulphur-containing gas, and working up the resulting reaction gas, after it has been used in the evaporation stage, to form sulphuric acid or elemental sulphur. The process is characterized in that before or during the evaporation stage, the wash solution is supplied either with no sulphuric acid or with an amount of sulphuric acid which is insufficient to liberate sulphur dioxide from all the ammonium sulphite and/or ammonium bisulphite present in the solution. Preferably, the amount of sulphuric acid added is sufficient to liberate sulphur dioxide from up to 83% (and particularly from 10 to 20%) of the ammonium sulphite and/or ammonium bisulphite present in the solution; the wash solution is evaporated down to a water content of between 25 and 50 wt. per cent; an oxygen content of between 2 and 10 vol. per cent is maintained in the reaction gas leaving the decomposition step; and the reaction gas is washed after having been used in the evaporation stage and the resulting wash acid is added to the wash solution to be treated. In a preferred embodiment, the evaporation stage takes place in a tower in which the reaction gas is flowing upwardly, and into which the wash solution and sulphuric acid are sprayed, at least part of the sulphuric acid being sprayed i.e. downstream of the spraying of the gas with the wash solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722257227 DE2257227A1 (en) | 1972-11-22 | 1972-11-22 | PROCESS FOR PROCESSING THE WASHING SOLUTION DURING THE WASHING OF EXHAUST GASES OF SO DEEP TWO |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1441422A true GB1441422A (en) | 1976-06-30 |
Family
ID=5862432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5396973A Expired GB1441422A (en) | 1972-11-22 | 1973-11-21 | Process for working up the wash solution obtained in the washing ofso2-containing gas with aqueous ammonium sulphite solution |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS4995874A (en) |
| DE (1) | DE2257227A1 (en) |
| GB (1) | GB1441422A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115367795A (en) * | 2022-09-01 | 2022-11-22 | 山东东佳集团股份有限公司 | Novel process for preparing ammonium sulfate by recycling catalyst titanium dioxide water washing liquid in acid making tail gas system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5230266A (en) * | 1975-09-04 | 1977-03-07 | Toyo Eng Corp | Exhaust gas desulfurization process |
-
1972
- 1972-11-22 DE DE19722257227 patent/DE2257227A1/en active Pending
-
1973
- 1973-11-21 JP JP48131602A patent/JPS4995874A/ja active Pending
- 1973-11-21 GB GB5396973A patent/GB1441422A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115367795A (en) * | 2022-09-01 | 2022-11-22 | 山东东佳集团股份有限公司 | Novel process for preparing ammonium sulfate by recycling catalyst titanium dioxide water washing liquid in acid making tail gas system |
| CN115367795B (en) * | 2022-09-01 | 2024-02-20 | 山东东佳集团股份有限公司 | Novel process for preparing ammonium sulfate by recycling catalyst titanium dioxide washing liquid in acid-making tail gas system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2257227A1 (en) | 1974-05-30 |
| JPS4995874A (en) | 1974-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |