Patent ID: 6297180
Filing Date: 2001-10-02
Classification: B01J,C03C,C07C,C07D

Abstract:
A sol-gel process for preparing shape selective catalytically active amorphous, microporous glasses comprising mixed oxides, said process comprising:a) dissolving successively in each other to obtain a clear solution at least two hydrolyzable, liquid or dissolved compounds of the elements titanium, silicon, aluminum, zirconium or cerium;b) stirring the clear solution at a pH of from 0 to 7 while adding aqueous acidic catalysts or fluoride ions to effect linear polymerization or polycondensation to obtain a gel;c) drying the gel under mild conditions by heating at 60 to 70.degree. C., and calcining the gel at temperatures in the range of 120 to 800.degree. at a slow heating rate to obtain an amorphous, microporous glass.