SYNTHESIS OF MESOPOROUS CATALYTIC MATERIALS

摘要

A novel siliceous molecular sieve material is describedfor use as catalyst, along with a process for its production.The sieve material is unique in having a bimodal pore sizedistribution with micropores having diameters in the rangefrom 5 to 12 .ANG. and uniformly sized mesopores having diametersin the range from 20 to 80 .ANG.. It is prepared by firstpreparing two reaction solutions, the first solutioncontaining a source of silica and the second solutioncontaining a quaternary ammonium surfactant having ahydrophilic ammonium group and a linear hydrophobichydrocarbon chain. The two solutions are combined and thesolid product obtained at room temperature is subjected to atwo-stage heat treatment.