Synthesis of zeolite beta with low template content

The influence of template content and crystallization temperature during the synthesis of Beta zeolite has been studied. Crystallization performed at 130°C showed that reducing the template ratio (TEA)2O/Al2O3 from 12.5 to 7.5, there is a considerable increase in the time of crystallization to accomplish 100% crystalline Beta zeolite. For the lower template ratio the required time for its crystallization was reduced by increasing the crystallization temperature to 150°C. No formation of Beta zeolite occurs for 8 days at a higher temperature (170°C), but formation of ZSM-5 was detected. Using the lower template ratio of 7.5 the crystal size of zeolite Beta increases considerably, and its Si/A ratio approaches that of the gel.