| abstract |
The invention relates to a process for the preparation of alkali polysilicates having a layer structure and having a composition of M2O 18 50 SiO 2 nH 2 O, where M is preferably K and Na and n is 5 to 20. The preparation is carried out by reaction in a ternary Na2O / SiO2 / H2O system with water-dissolved or water-soluble amorphous silicates under autogenous pressure at 350 to 500 K. Alkali-layered silicates can be used as ion exchangers, adsorbents, fillers, pigments, carriers for active ingredients and others Molecules, catalysts and catalyst carriers are used. |