SU352830A1 - Method of oxidation of sulfuric anhydride - Google Patents
Method of oxidation of sulfuric anhydrideInfo
- Publication number
- SU352830A1 SU352830A1 SU1476002A SU1476002A SU352830A1 SU 352830 A1 SU352830 A1 SU 352830A1 SU 1476002 A SU1476002 A SU 1476002A SU 1476002 A SU1476002 A SU 1476002A SU 352830 A1 SU352830 A1 SU 352830A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- oxidation
- catalyst
- sulfuric anhydride
- contact
- layer
- Prior art date
Links
- 230000003647 oxidation Effects 0.000 title description 3
- 238000007254 oxidation reaction Methods 0.000 title description 3
- AKEJUJNQAAGONA-UHFFFAOYSA-N Sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 title 2
- 239000003054 catalyst Substances 0.000 description 8
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 230000000607 poisoning Effects 0.000 description 4
- 231100000572 poisoning Toxicity 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 150000002222 fluorine compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910004018 SiF Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003197 catalytic Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 229910052904 quartz Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Изобретение относитс к способам каталитического окислени сернистого ангидрида.This invention relates to methods for the catalytic oxidation of sulfur dioxide.
Дл предохранени «онтактной массы ог отравлени фтористыми соединени ми в известной схеме производства осуществл ют промывку газа разбавленной серной кислотой . Однако при повышенном содержании фтора в сырье наблюдаетс лроскок фтористых соединений через промывное отделение и попадание их на катализатор. При этом при взаимодействии SiF с па1рами воды образуетс SiO2, который покрывает поверхность гранул катализатора и делает его неактивным .In order to protect the ontact mass of the poisoning agent with fluoride in the known production scheme, the gas is washed with dilute sulfuric acid. However, with an increased content of fluorine in the raw material, very low levels of fluoride compounds are observed through the washing compartment and their contact with the catalyst. In this case, when SiF interacts with water vapor, SiO2 is formed, which covers the surface of the catalyst granules and makes it inactive.
При получении серной кислоты по системе СО по схеме двойного контактировани отравление катализатора происходит во второй стадии контактировани .When sulfuric acid is produced by the CO system according to the double-contact scheme, the poisoning of the catalyst occurs in the second stage of contact.
Дл предотвращени отравлени катализатора фтористыми соединени ми предлагаетс газ предварительно пропускать через слой пористого материала (отработанную контактную массу, пемзу, силикагель, диатомит и др.) при температуре 400-500°С.To prevent catalyst poisoning by fluoride compounds, it is proposed to pre-pass gas through a layer of porous material (waste contact mass, pumice stone, silica gel, diatomite, etc.) at a temperature of 400-500 ° C.
Пример. Газ с содержанием 2,5% SO2Example. Gas with 2.5% SO2 content
подогревают до температуры и подают в две стальные контактные колонки, загруженные гранулированной контактной массой БАВ в следующих количествах; перва колонка-два сло по 66 втора колонка- один слой 133 см. Опытна установка работает в течение 81 суток при среднем содержани фтора в газе 30 мг/мм и скорости подаваемого газа 30 лмин. За врем опыта вheated to temperature and served in two steel contact columns loaded with granular contact mass of biologically active substances in the following quantities; The first column is two layers, 66 are in the second column; one layer is 133 cm. The test installation works for 81 days with an average fluorine content in the gas of 30 mg / mm and the feed gas velocity of 30 lmin. During the experience in
колонку поступает 104,8 г фтора.the column receives 104.8 g of fluorine.
В контактной колонке с 2 мл сло ми массы (т. е. с защитным слоем катализатора) снижение активности массы второго сло не наблюдаетс , а в колонке с одним слоем катализатора активность задаете 79,6 до 46,1%.In the contact column with 2 ml mass layers (i.e., with a protective catalyst layer), no decrease in the mass activity of the second layer is observed, and in a column with a single catalyst layer, the activity is set to 79.6 to 46.1%.
Предмет изобретени Subject invention
Способ окислени сернистого ангидрида в присутствии катализатора при повыщенной температуре, отвечающийс тем, что, с целью предотвращени отравлени катализатора фтористыми соединени ми, газ предварительно пропускают через слой пористого материала при температуре 400-500°С.The method of oxidation of sulfur dioxide in the presence of a catalyst at an elevated temperature, is responsible for the fact that, in order to prevent catalyst poisoning by fluoride compounds, the gas is preliminarily passed through a layer of porous material at a temperature of 400-500 ° C.
Publications (1)
Publication Number | Publication Date |
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SU352830A1 true SU352830A1 (en) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5324499A (en) * | 1990-11-30 | 1994-06-28 | Chemetics International Co. Ltd. | Fluoride removal from sulphuric acid |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5324499A (en) * | 1990-11-30 | 1994-06-28 | Chemetics International Co. Ltd. | Fluoride removal from sulphuric acid |
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