CHARGE FOR PREPARATION OF CATALYST TO OXIDIZE SULFUR DIOXIDE INTO SULFUR TRIOXIDE AND METHOD OF ITS PRODUCTION Russian patent published in 2003 - IPC

FIELD: chemical industry. SUBSTANCE: invention is dealt with production of vanadic oxidation catalysts for oxidation of sulfur dioxide into sulfur trioxide in production of sulfuric acid by a contact method, in particular, with a charge for obtaining the catalyst. It describes the charge for preparation of vanadic catalysts for oxidation of sulfur dioxide into trioxide in production of sulfuric acid and a method of its production. The charge includes, in mass %: 6.0-11.0 vanadium pentoxides , 7.3-20.0 potassium oxides, 0.3-6.3 sodium oxides, 22.0-36.5 sulfur trioxide, 0.2-5.0 polyethylene oxide, the rest silica carrying agent, and as the carrying agent it contains a siliceous material including oxide of an alkali metal, such as potassium or sodium, or their blend in quantity 0.3-20.0 mass % in recalculation on a dry product. The carrying agent represents hydrosilicagel or a blend hydrosilicagel with the powder-like carrying agent injected in quantity up to 85 mass %, at that both used siliceous materials in their initial state should contain potassium or sodium oxides or their blend in the quantities ensuring the stated interval of 0.3-20.0 mass %. EFFECT: production of the charge for preparation of catalyst for oxidation of sulfur dioxide into trioxide with high activity in the field of low temperatures of reaction and low ratios of SO₃/SO₂ in a reaction blend. 4 cl, 2 tbl, 7 ex _