Shaped articles based on pyrogenically produced titanium dioxide, method of their production and their use

摘要

Pressed parts based on pyrogenically produced titanium dioxide with the following physico-chemical characteristics: -Outer diameter 0.8-15 mm -BET surface according <1-20 m2/g -to DIN 66 131 -Pore volume 0.01-0.29 cm3/g -Pore distribution no pores <10 nm - at least 90% of the pores - in a range of 10-80 nm -Breaking strength 30-500 N/pressed part -TiO2 phase rutile 100% -Composition >99.5% TiO2 - They are produced by mixing pyrogenically produced titanium dioxide with urea, graphite and water, compacting the mixture, optionally drying the resulting mass at 80 DEG C. to 120 DEG C. comminuting, subsequently extruding or tabletting to produce pressed parts and tempering the pressed parts at a temperature of 710 DEG C. to 1000 DEG C. for a period of 0.5 to 6 hours. The pressed parts can be used as catalyst or catalytic carrier.