TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The flow velocity of the template or the precipitate suspension in the reactor is 0.001-10 m/second. The template in step (a), next to the acidifying agent, includes peroxide, which mixes a yellow/orange compound with titanium(IV) ion under acidic conditions. The silicon dioxide exhibits a content of aluminum of 0.01-5 ppm, boron of less than 1 ppm, calcium of less than or equal to 1 ppm, iron of less than or equal to 5 ppm, nickel of less than or equal to 1 ppm, phosphorus of less than 1 ppm, titanium of less than or equal to 5 ppm and zinc of less than or equal to 1 ppm, and the sum of the above impurities plus sodium and potassium is less than 10 ppm. The silicon dioxide has an average particle size (d50) of 0.1-10 mm. Preferred Process: The addition of the silicate solution in step (c) takes place in such a way that the silicate solution occurs in droplets form in the template and/or precipitate suspension, preferably in such a way that the silicate solution is introduced into the template through a suitable metering pump, preferably the introduction takes place by the metering pump installed outside the template/precipitate suspension, and/or by metering pump immersed into the template or precipitate suspension. The silicon dioxide particles obtained after step (c) exhibit a ring-shaped form or the shape of a mushroom cap, i.e. a ring-shaped base structure whose inner hole is overstretched by a layer made of silicon dioxide, which is curved on one side. In the process, no further step is carried out between step (c), the separation of silicon dioxide and the washing with a washing medium with a pH-value of less than 2, preferably less than 0.5. In the process, after the washing with a washing medium with a pH-value of less than 2, preferably less than 0.5, an additional washing with distilled water takes place, until the pH-value of the obtained silicon dioxide lies at 4-7.5, and/or the conductivity of the washing suspension is less than 9 mu S/cm, preferably less than 5 mu S/cm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The acidifying agent is hydrochloric acid, phosphoric acid, nitric acid, sulfuric acid, chlorosulfonic acid, sulfuryl chloride and/or perchloric acid in concentrated or diluted form. EXAMPLE - In a beaker (3000 ml), 16.3% sulfuric acid (2500 g) and 35% hydrogen peroxide (16 g) were added and water glass (8.05% sodium oxide, 26.7% silicon dioxide, density of 1.3505 g/ml and viscosity of 0.582 Poise) (750 g) was dropped with slow stirring. During the dropwise addition, gelatinized particles in mushroom cap shape (jellyfish shape) were formed. The structures were thin-walled and sedimented completely. The supernatant solution was yellow colored and showed no turbidity. For reconditioning of the suspension, the supernatant was decanted. For solid material, a mixture of deionized water (1000 ml) and 96% sulfuric acid (50 ml) was added and heated in a heating bath at 70-80 degrees C. After the suspension was cooled, the supernatant was again decanted. This process was repeated ten times. Subsequently, each one was diluted with 1000 ml deionized water portions and decanted until a pH-value of 5.5 was reached. The product (96.4% yield) was dried in a porcelain dish overnight at 105 degrees C in a circulating air.