GB489745A - Process for the absorption and subsequent recovery of sulphur dioxide from gases containing the same - Google Patents
Process for the absorption and subsequent recovery of sulphur dioxide from gases containing the sameInfo
- Publication number
- GB489745A GB489745A GB1405537A GB1405537A GB489745A GB 489745 A GB489745 A GB 489745A GB 1405537 A GB1405537 A GB 1405537A GB 1405537 A GB1405537 A GB 1405537A GB 489745 A GB489745 A GB 489745A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphate
- ammonium
- solution
- sulphur dioxide
- tower
- 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
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/60—Isolation of sulfur dioxide from gases
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
<PICT:0489745/III/1> In the continuous recovery of sulphur dioxide from gases, the sulphur dioxide is absorbed in a solution of alkali metal or ammonium sulphites and sulphate containing such amounts of these salts to make it nearly saturated at the absorption temperature with respect to sulphate only, the absorbent solution is treated to expel pure sulphur dioxide, a part of the water is eliminated from the solution which is then cooled sufficiently to crystallize controlled amounts of sulphate, the crystallized sulphate is removed, and finally the absorbent solution is restored to its original condition by the addition of water and alkali or ammonia and recycled to the absorption stage of the process. Sulphates formed by oxidation are thereby eliminated from the system. When using ammonium salts, a sufficient concentration of an ammonium salt such as ammonium phosphate may be maintained in the solution to depress the solubility of the ammonium sulphate. The removal of the necessary water may take place in the sulphur dioxide recovery step and/or in the sulphate crystallization step. Roaster gases containing sulphur dioxide flow through absorption towers A and B in counter current to an ammonium monosulphite-ammonium bisulphite solution which enters the top of tower B at a temperature of below 50 DEG C. The solution also passes through a cooler E interposed between the two towers. The liquor withdrawn from the tower A is substantially ammonium bisulphite and is heated in a tower C to 110 DEG C. to drive off the sulphur dioxide. Considerable sulphate is formed by oxidation during the absorption and regeneration stages as a result of which the liquor leaving the tower C at 110 DEG C. is saturated with sulphate. The liquor passes to a vacuum crystallizer D, which has a temperature of about 70 DEG C. Here water is evaporated and ammonium sulphate separated by crystallization. The solution is then replenished with water and ammonia and is returned to the top of the tower B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1405537A GB489745A (en) | 1937-05-20 | 1937-05-20 | Process for the absorption and subsequent recovery of sulphur dioxide from gases containing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1405537A GB489745A (en) | 1937-05-20 | 1937-05-20 | Process for the absorption and subsequent recovery of sulphur dioxide from gases containing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB489745A true GB489745A (en) | 1938-08-03 |
Family
ID=10034161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1405537A Expired GB489745A (en) | 1937-05-20 | 1937-05-20 | Process for the absorption and subsequent recovery of sulphur dioxide from gases containing the same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB489745A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1267671B (en) * | 1963-12-03 | 1968-05-09 | Zieren Chemiebau Gmbh Dr A | Process for the recovery of sulfur oxides and ammonia from the aqueous washing solution of the ammonia laundry of sulfur dioxide-containing exhaust gases |
| US3485581A (en) * | 1966-11-15 | 1969-12-23 | Wellman Lord Inc | Process for recovering sulfur dioxide from gases containing same |
| US4207299A (en) * | 1977-02-16 | 1980-06-10 | Davy Powergas, Inc. | Sulphur dioxide removal process |
| US4216189A (en) * | 1978-10-10 | 1980-08-05 | Davy Powergas, Inc. | Sulfur dioxide removal process |
| US4310691A (en) | 1978-10-31 | 1982-01-12 | Aktiebolaget Svenska Flaktfabriken | Method for selectively recovering sodium citrate from an aqueous solution |
| CN113035035A (en) * | 2021-03-26 | 2021-06-25 | 漯河医学高等专科学校 | Device for preparing sulfur dioxide in laboratory |
-
1937
- 1937-05-20 GB GB1405537A patent/GB489745A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1267671B (en) * | 1963-12-03 | 1968-05-09 | Zieren Chemiebau Gmbh Dr A | Process for the recovery of sulfur oxides and ammonia from the aqueous washing solution of the ammonia laundry of sulfur dioxide-containing exhaust gases |
| DE1267671C2 (en) * | 1963-12-03 | 1973-02-15 | Zieren Chemiebau Gmbh Dr A | Process for the recovery of sulfur oxides and ammonia from the aqueous scrubbing solution of the ammonia laundry of exhaust gases containing sulfur dioxide |
| US3485581A (en) * | 1966-11-15 | 1969-12-23 | Wellman Lord Inc | Process for recovering sulfur dioxide from gases containing same |
| US4207299A (en) * | 1977-02-16 | 1980-06-10 | Davy Powergas, Inc. | Sulphur dioxide removal process |
| US4216189A (en) * | 1978-10-10 | 1980-08-05 | Davy Powergas, Inc. | Sulfur dioxide removal process |
| US4310691A (en) | 1978-10-31 | 1982-01-12 | Aktiebolaget Svenska Flaktfabriken | Method for selectively recovering sodium citrate from an aqueous solution |
| CN113035035A (en) * | 2021-03-26 | 2021-06-25 | 漯河医学高等专科学校 | Device for preparing sulfur dioxide in laboratory |
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