| 摘要 |
<p>Novel crystalline alumino silicates having the following composition in terms of the mole ratio of the oxides: 0.9 +/- 0.2 M2 n : Al2O3 : x SiO2 ; yH2O wherein M is at least one cation having a valence n, x is at least 10 and y/x is between 0 and 25, said aluminosilicates having a characteristic X-ray diffraction pattern. The cation M in the aluminosilicates is preferably selected from H<+>, ammonium, alkali metal cations, alkaline earth metal cations, organic nitrogen-containing cations, aluminium cations, gallium cations and mixtures thereof. The invention also comprises a process for producing the aluminosilicate by mixing together a source of silica, a source of alumina, a source of alkali metal(s), water and an organic nitrogen containing base until a homogeneous gel is formed and crystallising the mixture at a temperature above 70 DEG C for a period of at least 2 hours.</p> |
