GB747785A - Production of oleum - Google Patents
Production of oleumInfo
- Publication number
- GB747785A GB747785A GB1133/54A GB113354A GB747785A GB 747785 A GB747785 A GB 747785A GB 1133/54 A GB1133/54 A GB 1133/54A GB 113354 A GB113354 A GB 113354A GB 747785 A GB747785 A GB 747785A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oleum
- sulphur trioxide
- gas
- absorber
- concentration
- 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
- C01B17/90—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Oleum of high concentration, e.g. 65 per cent, is produced from gases containing a relatively low concentration of sulphur trioxide, e.g. contact gases, by contacting a solution of oleum of relatively low concentration in a primary absorber with hot sulphur trioxide-containing gas in counter current flow, withdrawing a portion of the gas from the absorber near the gas inlet thereof, the conditions being such that said withdrawn gas contains an increased sulphur trioxide content, and absorbing the withdrawn gas in a solution of oleum of relatively high concentration in a secondary absorber so as to further increase the concentration of this oleum. The gas issuing from the secondary absorber may be led back into the primary absorber towards the gas outlet end thereof to recover further quantities of sulphur trioxide. Contact gases at 230-250 DEG C. and containing 7 per cent of sulphur trioxide and 27.5 per cent oleum, at a temperature at which the vapour pressure corresponds to the partial pressure of sulphur trioxide in gases containing about 3 per cent of sulphur trioxide, may be used in the primary absorber. Oleum of 65 per cent concentration may be used in the secondary absorber and recycled, after adding water to maintain said concentration and bleeding off the excess solution formed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE747785X | 1953-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB747785A true GB747785A (en) | 1956-04-11 |
Family
ID=6648703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1133/54A Expired GB747785A (en) | 1953-01-14 | 1954-01-14 | Production of oleum |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB747785A (en) |
-
1954
- 1954-01-14 GB GB1133/54A patent/GB747785A/en not_active Expired
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