FUSION MIXTURE FOR PREPARATION OF THE CATALYST OF CONVERSION OF SULFUR DIOXIDE INTO SULFUR TRIOXIDE Russian patent published in 2008 - IPC B01J23/22 B01J23/04 B01J31/06 

FIELD: chemical industry; other industries; production of the vanadium catalysts for oxidation of sulfur dioxide and sulfur trioxide.

SUBSTANCE: the invention is pertaining to production of the vanadium catalysts for oxidation of sulfur dioxide and sulfur trioxide used in production of the sulfuric acid by the contact method, in particular, to the fusion mixture for production of the catalyst. The technical problem of the present invention is improvement of the operational properties of the catalyst of the conversion of SO₂ into SO₃, namely - improvement of the strength of the extruded calcined granules of the ready catalyst without deterioration of its catalytic activity at the expense of decrease of the minimal working humidity of the contact mass at extrusion. The fusion mixture for preparation of the catalyst of conversion of SO₂ into SO₃ includes vanadium oxides and oxides of the alkali metals (K, Na, Rb, Cs), sulfur, polyethyleneoxide, silicon dioxide in the form of the natural and-or synthetic silica. The contents in it of the polyethyleneoxide is within the limits from 0.005 up to 0.195 mass %, in terms of the dry substance.

EFFECT: the invention ensures the improved operational properties of the catalyst of the conversion of sulfur dioxide into sulfur trioxide and the improved strength of the extruded calcined granules of the ready catalyst without deterioration of its catalytic activity.

10 ex, 1 tbl, 1 dwg