Liquid sulfur trioxide equipment
2020-03-05
liquid sulfur trioxideAlso known as sulfuric anhydride, there are three allotropes, alpha type, melting point 62 ℃, beta type, melting point 32.5 ℃, gamma type, melting point 16.8 degrees Celsius, boiling point 45 ℃, the general product is a mixture, the melting point is not constant, it is generally considered to be liquid at room temperature.liquid sulfur trioxideSoluble in water for sulfuric acid, soluble in concentrated sulfuric acid for fuming sulfuric acid, dissolved a large amount of heat, corrosive weak but strong oxidation, used for the production of sulfuric acid and chlorosulfonic acid, also used for organic sulfonation, by the catalytic oxidation of sulfur dioxide, its gas form is a serious pollutant, is one of the main sources of acid rain.
Natural steel pipe plant waste acid treatment equipment solids have a surprisingly complex structure with structural changes due to trace amounts of water. Due to the liquefaction of the gas, extremely pure SO3 condenses to form a trimer commonly referred to as γ-SO3. This molecular form is a colorless solid with a melting point of 16.8 ° C., which forms a ring structure called [S (═O) 2(μ-O)]3.
In the laboratory commonly used concentrated sulfuric acid and phosphorus pentoxide co-heating to produce sulfur trioxide, which will produce phosphoric acid, in the reaction of the formationliquid sulfur trioxideIt needs to be cooled with an ice-water mixture, and the off-gas is absorbed with concentrated sulfuric acid (85%). The industrial manufacturing method of waste acid treatment equipment in steel pipe plant is contact method. Sulfur dioxide is usually obtained by the combustion of sulfur or the calcination of pyrite ore (a sulfur-containing iron ore, the main component of which is ferrous disulfide, FeS2), and is first purified by electrostatic precipitation. The purified SO2 is oxidized with oxygen at a temperature of 400 to 600°C using vanadium pentoxide containing potassium oxide or potassium sulfate (promoter) supported on diatomaceous earth as a catalyst.liquid sulfur trioxide.
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