Organic template-free synthesis of ZSM-34 zeolite from an assistance of zeolite L seeds solution

A novel process for organic template-free synthesis of an aluminosilicate zeolite of ZSM-34 from an assistance of zeolite L seed solution has been presented. ZSM-34 zeolite was hydrothermally synthesized in a poly-(tetrafluoroethylene)-lined stainless steel autoclave with starting gels in the presence of zeolite L seed solution. For the preparation of starting gel, NaOH was dissolved into water, followed by introduction of colloidal silica. After stirring the solution, Al₂(SO₄)₃ was added, followed by the addition of zeolite L seed solution. After being stirred, the mixture was transferred into an autoclave to crystallize at 100°C for 7-17 days. The product was collected by filtration. washed with deionized water, and dried in air. It was observed that zeolite L seed solution plays a key role for the crystallization of ZSM-34 zeolite.