METHOD FOR THE PRODUCTION OF HIGH-PURITY SIO2
The invention relates to a method for producing high-purity SiO2, comprising steps a. producing a precursor from an acidifying agent having a pH value of less than 2; b. providing a silicate solution; c. adding the silicate solution from step b. to the precursor from step a. such that the pH value of the obtained precipitation suspension remains below 2 at all times; and d. separating and washing the obtained silicon dioxide, the silicon dioxide obtained in the precipitation process being continuously or semi-continuously separated from the precipitation zone and being washed in a washing zone that is separated from the precipitation zone. The invention further relates to a system for carrying out said method.