GB1002584A - Improvements in or relating to the manufacture of pure sulphur dioxide - Google Patents
Improvements in or relating to the manufacture of pure sulphur dioxideInfo
- Publication number
- GB1002584A GB1002584A GB1211162A GB1211162A GB1002584A GB 1002584 A GB1002584 A GB 1002584A GB 1211162 A GB1211162 A GB 1211162A GB 1211162 A GB1211162 A GB 1211162A GB 1002584 A GB1002584 A GB 1002584A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reactor
- oleum
- liquid
- valve
- rich
- 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
-
- 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
- C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
- C01B17/502—Preparation of sulfur dioxide by reduction of sulfur compounds of sulfur trioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
<PICT:1002584/C1/1> In manufacturing pure SO2, molten elemental sulphur is introduced into a reactor 1 containing oleum maintained at a temperature below the solidification point of sulphur (120 DEG C.) while subjecting the reaction medium to agitation. Liquid sulphur at 125 DEG to 155 DEG C. is fed continuously at 8 to reactor 1 containing a stirring device consisting of inverted cone 3 and impeller 4. The contents of reactor 1 are maintained at 90 DEG C. by steam jacket 2 and the sulphur is converted into spherules of diameters up to 3 mm. Withdrawal of part of the reaction medium and introduction of SO3-rich oleum are carried out discontinuously and alternately through a filter 5 which is a ring of porous material, e.g. polytetrafluoroethylene. From filter 5 pipe 7 leads to 3-way valve 11. The SO3-rich oleum is introduced by injection under a gaseous SO2 pressure; obstruction of filter 5 caused during previous withdrawal of reaction medium may be cleared partly by the introduction of the SO3-rich oleum and completely by the passage of gaseous SO2 through the filter in the same direction. While liquid is being withdrawn from reactor 1 by pump 12, rich oleum is stored in measuring tank 14 fed through 19 by pump 20 which is stopped by level detector 21 when the liquid in tank 14 reaches a predetermined level 141. When the pressure in SO2 reservoir 16 reaches a predetermined minimum, manometer 22 opens valve 23 to allow compressed SO2 to enter 16 and simultaneously causes valve 11 to rotate so as to allow withdrawal of liquid from the reactor. Valve 23 is closed by the action of manometer 22 when a predetermined maximum pressure is reached in 16. When the level of liquid in 1 falls to the level of probe 10, valve 11 is automatically placed in the position such that rich oleum is admitted from tank 14 to beaker 1. The SO2 which leaves the reactor 1 via pipe 9 is purified and freed from liquid droplets at 24, and is compressed and liquefied at 25. In the example it is stated that the free SO3 content of the oleum in the reactor varies from 13 to 15% during the cycle. The rich oleum contains 35% SO3. About 1/15 of the quantity of SO2 produced is recycled each time, the injection pressure varying between 3 kg./cm.2 and 1.5 kg./cm.2 during the cycle.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR861748A FR1297181A (en) | 1961-05-15 | 1961-05-15 | Pure sulfur dioxide manufacturing process |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1002584A true GB1002584A (en) | 1965-08-25 |
Family
ID=8755140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1211162A Expired GB1002584A (en) | 1961-05-15 | 1962-03-29 | Improvements in or relating to the manufacture of pure sulphur dioxide |
Country Status (4)
Country | Link |
---|---|
FR (1) | FR1297181A (en) |
GB (1) | GB1002584A (en) |
LU (1) | LU41698A1 (en) |
NL (1) | NL277137A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4175112A (en) * | 1978-07-17 | 1979-11-20 | Stauffer Chemical Company | Process for purification of gases containing elemental sulfur |
CN107934919A (en) * | 2017-12-18 | 2018-04-20 | 山东凯盛新材料股份有限公司 | Low concentration oleum continuously produces the Processes and apparatus of sulfur dioxide |
-
0
- NL NL277137D patent/NL277137A/xx unknown
-
1961
- 1961-05-15 FR FR861748A patent/FR1297181A/en not_active Expired
-
1962
- 1962-03-29 GB GB1211162A patent/GB1002584A/en not_active Expired
- 1962-05-12 LU LU41698D patent/LU41698A1/xx unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4175112A (en) * | 1978-07-17 | 1979-11-20 | Stauffer Chemical Company | Process for purification of gases containing elemental sulfur |
CN107934919A (en) * | 2017-12-18 | 2018-04-20 | 山东凯盛新材料股份有限公司 | Low concentration oleum continuously produces the Processes and apparatus of sulfur dioxide |
CN107934919B (en) * | 2017-12-18 | 2021-08-06 | 山东凯盛新材料股份有限公司 | Process and equipment for continuously preparing sulfur dioxide by low-concentration oleum |
Also Published As
Publication number | Publication date |
---|---|
NL277137A (en) | |
FR1297181A (en) | 1962-06-29 |
LU41698A1 (en) | 1962-07-12 |
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