Crystalline beryllo-alumino-silicates and process for their manufacture

摘要

Alkali metal beryllo-alumino-silicates of the mordenite type form, under hydrothermal conditions (100 DEG -300 DEG C in a Carius tube), from aqueous mixtures containing the structural components SiO2, Al2O3 and BeO and alkali metal hydroxides. In beryllium-containing mordenites, ratios of SiO2 to Al2O3 of from 10:1 to 120:1 may be achieved, whereas values of only up to 10:1 are known in the pure alumino-silicates of this type. The alkali metal beryllo-alumino-silicates are accessible to ion exchange in the same way as the beryllium-free representatives. The so-called NH4- and H-forms obtaineable by ion exchange may be used for the synthesis of highly active sorption compositions or catalysts after calcination.