Method for producing a carrier for olefin polymerization catalysts

The present invention is a hydrogel comprising a cogel of silicon oxide and at least one further metal oxide prepared; if appropriate, less than 0.1 weight percent based on the weight of the content of alkali metal ions is solid the hydrogel was washed until; moisture content extracts the water from the hydrogel until the total content of the liquid to less than 5% by weight based on; and to form a xerogel by drying the hydrogel; comprising the step, olefin polymerization the method for producing a substantially spherical carrier for catalysts. According to the present invention, the extraction process is water and using at least partially miscible organic solvents, to a water content of less than 50 wt%, of at least one batch extraction performed; Subsequently, water comprising; at least partially performs at least one continuous extraction using a miscible organic solvent.