| Name | SO oxidation catalysts |
| Synonyms | SO oxidation catalysts |
use
Used for the production of sulfuric acid by the contact method to catalyze the oxidation of SO2 to SO3
SO2+1/2O2=SO3 +Q
S101 In the production of sulfuric acid by contact method, SO2 is oxidized to SO3. S101-6 has larger particle diameter and higher mechanical strength, and is suitable for sulfuric acid production plants with lower ventilation pressure drop. S101 inlet impurity content: moisture <0.1g/m3(VN), acid mist <0.005g/m3(VN), mineral dust <1mg/m3(VN), arsenic <1mg/m3(VN). S106 is used for contact sulfuric acid production with arsenic content of 5~50mg/m3 in feed gas. S107 is used in the first or last stage of the converter in the production of sulfuric acid by the contact method. It is a low-temperature catalyst. S107-1H, due to the large free space of the catalyst bed, it is suitable for sulfuric acid plants with poor gas purification. S107 inlet impurity requirements: moisture <0.1g/m3(VN), acid mist <0.005g/m3(VN), mineral dust <1mg/m3(VN), arsenic <1mg/m3(VN).
S107-6 is suitable for sulfuric acid production plants with low ventilation pressure drop due to its large particle diameter and high mechanical strength. S108 is used to produce sulfuric acid by contact method. FV1 (medium temperature),FV7 (low temperature type) SO2 vanadium oxide catalysts are boiling bed vanadium catalysts. S108 inlet impurity requirements: moisture <0.1g/m3(VN), acid mist <0.03g/m3(VN), mineral dust <5mg/m3(VN), arsenic <1mg/m3(VN), oxygen <1mg/m3(VN).
production method
blow solid KOH with steam in the alkali barrel, introduce the solution into the vanadium barrel, and add solid V2O5. Air is introduced to stir and heated with steam, thus preparing a mixed solution of KOH and KVO3 with a certain K/V ratio. Insoluble matter is removed by clarification method, the clear liquid is transferred into the neutralization tank, and sulfuric acid is added to generate complex colloidal precipitate formed by K2SO4, V2O5 and H2O, which is transferred into the kneading machine, and refined diatomaceous earth (SiO2), sulfur powder and returned material are added to carry out rolling and kneading. A small amount of water is added after a certain period of time to form dark red plastic "mud" material containing about 40% water. The "mud" material is sent to the forming machine to be extruded into strips or rings, the formed particles are placed on a continuously moving chain plate, dried in a drying kiln (<150 ℃), then sent to a rotary kiln for calcination (550~650 ℃), and the finished product is obtained by cooling and sieving after firing. The fine powder after crushing the fragments and powder is returned.