| 摘要 |
<p>Highly siliceous zeolitic aluminosilicates are prepared hydrothermally from reaction gels which are essentially free of alkali metal cations, but which contain alkaline earth metal cations in combination with alkylammonium cations. The product zeolites can be employed, without any intermediate ion-exchange procedure, in applications which are adversely affected by alkali metal cations.</p> |
