METHOD FOR OXIDATION OF SULFUR DIOXIDE Russian patent published in 2003 - IPC

FIELD: chemistry, chemical technology. SUBSTANCE: invention relates to methods used for oxidation of sulfur dioxide to sulfur trioxide. Method for oxidation of sulfur dioxide involves passing reaction gas containing at least sulfur dioxide and oxygen successively through the first layer of catalytically inert granulated material, at least two layers granulated vanadium catalyst, the second layer of inert material, intermediate cooling reaction gas between layers of catalyst and periodic alternation of direction passing reaction gas for opposed direction. This alternation is carried out at reduction of the fixed minimally admissible temperature value of reaction gas 100-500 C being the latter is measured inside the first catalyst layer by reaction gas running. Periodic alternation of direction in reaction gas passing in layers of inert material only retains the stability of reaction gas moving direction in catalyst layers. Measurement of temperature is carried out in the point located at axis line of layer and distancing from the point of reaction gas administration in this catalyst layer for distance 0-75% of height of this layer. This method provides processing reaction gases with enhanced parent content of sulfur dioxide. Invention can be used for oxidation of sulfur dioxide to sulfur trioxide in production of sulfuric acid being both from elemental sulfur and sulfur-containing minerals (pyrite) and in treatment of sulfur- -containing industrial gaseous exhausts. EFFECT: improved oxidation method. 1 dwg, 1 ex