Thermal Stability and Acidity of Al3+ Cross Linked Smectites

摘要: The preparation of a novel type wide pore zeolites has been proposed by exchanging dioctaedral smectites aluminium macrocations. thermal stability these solids investigated X-ray diffraction and measurements surface areas size distributions. evolution texture with the calcination temperature corresponds to sintering fraction micropores. This is similar for several clays different origins correlated degree cross linking. By optimization this parameter residual area 130 m2g-1 obtained after in air at 800°C. resulting solid strong acidity, mainly Lewis type. Pyridine retention evacuation 500°C shows that acidic strength higher than Y zeolites.