PROCESS FOR PRODUCTION OF ZEOLITES FROM RAW MATERIALS CONTAINING ALKALI ALUMINO HYDRO-SILICATES

摘要

The invention relates to a process for production of zeolites from raw materials with alkali alumino-hydrosilicate content comprising converting the alkali alumino-hydrosilicate content of the raw material into an amorphous state by acidic treatment, separating the intermediate amorphous solid material from the liquid phase and optionally purifying same, re-suspending it in water, alkalizing the suspension, followed by forming a slurry of the composition corresponding to the type of zeolite to be manufactured optionally by blending it with components containing SiO2, and/or A l2O3 and/or Na2O, followed by crystallization by method known per se after optionally adding crystal nuclei and/or aging of the synthesis slurry and separating the obtained zeolite product.