Zeolite L synthesis using different molar gel compositions for the purposeof minimizing reagent waste

A new starting molar gel composition 1.3K(2)O:Al2O3:6.0SiO(2):37H(2)O conta ining much less silica, potassium and water than a conventional gel composi tion has been successfully used for the synthesis of zeolite L with minimum chemical waste. Inductively coupled plasma analysis on the mother liquors showed that conversion of 99.7% for Al, 90.9% for Si and 82.2% for K had be en achieved when the new gel composition was used for the synthesis. The ze olite L synthesized from the new gel composition showed a well-defined cyli ndrical morphology. Zeolite L has also been synthesized from two other modi fied molar gel compositions 1.5K(2)O:Al2O3:6.0SiO(2):37H(2)O and 1.9K(2)O: 1.0Al(2)O(3):6.0SiO(2):67H(2)O. The chemical waste associated with those tw o synthesis gel compositions is also greatly reduced. (C) 2001 Elsevier Sci ence B.V. All rights reserved.