Process for the production of silica with an aerogel type structure

摘要: Aerogel like silica is prepared having: A BET surface area between 80-450 m 2 /g; bulk density 10-60 g/l; DBP number 2.4-3.8; An average particle size range of 0.1-7 μm; most frequent 1-2 pH value in a 4% aqueous suspension 6-8. The aerogel produced by homogeneously distributing 5-50 weight % water air dispersed pyrogenic and drying the powdery mixture obtained. products are especially useful as delustering agents.