A process for the preparation of highly pure silica granules

A method for producing a Siliciumdioxidgranulates with a specific surface area of less than 1 m a) a silicon dioxide having a tamped density of 15 to 190 g / l, b) compacted to give crusts and these breaks subsequently, the slug fragments have a tamped density of 210 to 800 g / l, and c) treating the slug fragments at 400 to 1100 ° C with one or more reactive compounds.