GB506002A - Improvements in and relating to the recovery of sulphur dioxide from gas mixtures - Google Patents
Improvements in and relating to the recovery of sulphur dioxide from gas mixturesInfo
- Publication number
- GB506002A GB506002A GB31949/37A GB3194937A GB506002A GB 506002 A GB506002 A GB 506002A GB 31949/37 A GB31949/37 A GB 31949/37A GB 3194937 A GB3194937 A GB 3194937A GB 506002 A GB506002 A GB 506002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphur dioxide
- sulphate
- calcium
- aqueous layer
- sulphuric acid
- 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
506,002. Recovering sulphur dioxide. IMPERIAL CHEMICAL INDUSTRIES, Ltd. Nov. 19, 1937, No. 31949. Convention date, Feb. 9. [Class 1 (ii)] In the recovery of sulphur dioxide from gas mixtures by the alternate absorption in and expulsion from an absorbent liquor consisting of an aqueous medium and one or more waterimmiscible organic bases, e.g. aniline, quinoline or crude xylidine, the liquor which has been used for absorbing the sulphur dioxide is separated into an aqueous layer and an organic base layer by expelling the sulphur dioxide, after which the aqueous layer, or a portion thereof, alone, is treated' in the presence of dissolved sulphur dioxide and neutral sulphate, with a calcium compound or compounds, the treated aqueous layer being then returned together with the organic base layer for further use in the absorption process. The calcium compound must be one that will react with the sulphuric acid to precipitate calcium sulphate without leaving any acid radicle which is non- volatile, e.g. calcium carbonate, sulphite, oxide or hydroxide. The dissolved sulphur dioxide must be in sufficient quantity to prevent the precipitation of any organic base as a result of the addition of the calcium compound and if a sparingly soluble calcium compound is used, must be present in an amount at least equivalent thereto. The amount of neutral sulphate must be such that by treatment of a fraction of the aqueous layer, it is.possible to remove as calcium sulphite an amount of sulphuric acid equivalent to that present in the whole of the aqueous layer or such that the total sulphate removed is more than equivalent to the total free sulphuric acid. The sulphates of sodium, potassium or ammonium arc suitable. The precipitated calcium sulphate may be removed prior to the return of the liquor to the main absorption. The neutral sulphate may be obtained by neutralising the sulphuric acid first formed with ammonia, caustic soda, or sodium carbonate. Specifcations 419,068, 436,116, and 443,314 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE506002X | 1937-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB506002A true GB506002A (en) | 1939-05-19 |
Family
ID=6546474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31949/37A Expired GB506002A (en) | 1937-02-09 | 1937-11-19 | Improvements in and relating to the recovery of sulphur dioxide from gas mixtures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB506002A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3047364A (en) * | 1958-04-12 | 1962-07-31 | Instituto Nacional Industria | Sulfur dioxide recovery from gases employing organic bases |
| US3413086A (en) * | 1967-02-27 | 1968-11-26 | Continental Oil Co | Conversion of potassium chloride to potassium sulfate |
-
1937
- 1937-11-19 GB GB31949/37A patent/GB506002A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3047364A (en) * | 1958-04-12 | 1962-07-31 | Instituto Nacional Industria | Sulfur dioxide recovery from gases employing organic bases |
| US3413086A (en) * | 1967-02-27 | 1968-11-26 | Continental Oil Co | Conversion of potassium chloride to potassium sulfate |
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