PROCESS FOR OBTAINING A HIGH QUALITY SYNTHETIC ZEOLITE

摘要

The invention relates to a process for obtaining a synthetic zeolite by the reaction between sodium silicate and sodium aluminate. The synthesis is performed in two different stages. In the first stage, 80...90% of the silicate and aluminate amount is supplied, so that the silicate : aluminate ratio be constant, with a value of 1...2, the resulting gel being directed to the second finishing stage, when it is heated and maintained at a temperature of 80...90 degree C for 1 h. The remainder of 10...20% sodium silicate solution is added The reaction mass is continuously recirculated for performing the micronisation of the slurry and the destruction of the resulting circular crystals. Then, the crystallized zeolite is separated by filtering and centrifuging, washed and dried.