| abstract |
It is disclosed the preparation of mold bodies based on pyrogen-produced mixed oxide with the following physicochemical labeling data: Outer diameter BET area Pore volume Fracture strength Composition 0.8-25 mm 5- 400 m2 / g 0.2-1.8 ml / g 5 to 350 N At least two of the group SiO2, ANO2, TiO2 and ZrO2 in any optional combination, with the exception of SiO2 - AI2O3, mixed oxide in which SiO2 is present in> 75% by weight. Other constituents Apparent density <1 wt% 250-100 c / 1, homogenizing the pyrogenic oxide produced optionally with one or more compounds from the group methylcellulose, methylhydroxyethylcellulose, wax, polyethylene glycol, magnesium stearate or aluminum stearate under addition. dries at a temperature of 70-150 ° C, optionally comminuted to a powder, optionally presses the powder into molds and tempers over a period of 0.5 to 10 hours at a temperature of 400 to 1200 ° C. These moldings can be used as catalyst or catalyst support in ethylene and propyl carbohydrate. |