GB443314A - Process for the recovery of sulphur dioxide from gases containing same - Google Patents
Process for the recovery of sulphur dioxide from gases containing sameInfo
- Publication number
- GB443314A GB443314A GB7324/35A GB732435A GB443314A GB 443314 A GB443314 A GB 443314A GB 7324/35 A GB7324/35 A GB 7324/35A GB 732435 A GB732435 A GB 732435A GB 443314 A GB443314 A GB 443314A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphur dioxide
- alkaline
- sulphur
- earth metals
- 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.)
- 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)
- Gas Separation By Absorption (AREA)
Abstract
In the recovery of sulphur dioxide from gases by washing them with a mixture of organic bases and water, and thereafter heating the reaction product, there is added to the circulating absorption liquor, either before, during or after the absorption step, compounds of alkaline-earth metals, which precipitate in the form of sparingly soluble alkaline-earth sulphates, the sulphuric acid formed by secondary reactions (e.g. the oxidation produced by the oxygen present and the autoxidation of the sulphur dioxide). The troublesome formation of sulphates of organic bases is thereby avoided and the separation of the aqueous liquid from the organic liquid is facilitated. In addition, the effluent gas from the absorption treatment and/or the sulphur dioxide recovered in the heating step may be treated with the above compounds in the presence of water, the organic base content of these gases being thereby recovered; the liquors thus obtained may be used in the main process. The oxides, hydroxides, carbonates, neutral and acid sulphites and other weak acid salts of the alkaline-earth metals, (e.g. calcium) may be employed in the process. Suitable organic bases include aniline and its homologues, toluidines, xylidines, compounds of the above kind alkylated in the amine group, pyridine, pyridine bases, quinoline, triethanolamine, hydroxylamines and hydrazines. As regards details, the process may be conducted in the manner described in the parent Specification. The presence of elementary sulphur or substances furnishing it under the conditions of working, e.g. sulphides of alkaline-earth metals or barium hydroxide obtained by reducing barium sulphate and containing sulphide, should be avoided since sulphur catalytically accelerates the autoxidation of sulphur dioxide.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE443314X | 1934-07-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB443314A true GB443314A (en) | 1936-02-26 |
Family
ID=6528461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7324/35A Expired GB443314A (en) | 1934-07-20 | 1935-03-08 | Process for the recovery of sulphur dioxide from gases containing same |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB443314A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2716136A (en) * | 1952-09-10 | 1955-08-23 | Exxon Research Engineering Co | Purification of ethanolamines |
US3987149A (en) * | 1973-12-25 | 1976-10-19 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method for removing sulfur dioxide from exhaust gas |
US4115517A (en) * | 1976-08-24 | 1978-09-19 | Spring Chemicals Limited | Treatment of sulfur oxides with aqueous glyoxylic acid solutions |
US4176164A (en) * | 1976-08-24 | 1979-11-27 | Spring Chemicals Limited | Treatment of sulfur oxides with aqueous glyoxylic acid solutions |
USRE31236E (en) | 1973-02-10 | 1983-05-10 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method of removing sulfur dioxide from combustion exhaust gas |
-
1935
- 1935-03-08 GB GB7324/35A patent/GB443314A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2716136A (en) * | 1952-09-10 | 1955-08-23 | Exxon Research Engineering Co | Purification of ethanolamines |
USRE31236E (en) | 1973-02-10 | 1983-05-10 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method of removing sulfur dioxide from combustion exhaust gas |
US3987149A (en) * | 1973-12-25 | 1976-10-19 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method for removing sulfur dioxide from exhaust gas |
US4115517A (en) * | 1976-08-24 | 1978-09-19 | Spring Chemicals Limited | Treatment of sulfur oxides with aqueous glyoxylic acid solutions |
US4176164A (en) * | 1976-08-24 | 1979-11-27 | Spring Chemicals Limited | Treatment of sulfur oxides with aqueous glyoxylic acid solutions |
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