Synthesis of zeolite ferrierite in the absence of inorganic cations

An attempt is made to prepare zeolite ferrierite in inorganic ion-free media using three different types of organic structure-directing agents: 1,4-diaminobutane (DB), ethylenediamine (ED) and pyrrolidine (py). The phase purity and crystal morphology of crystalline products are strongly dependent on the type and concentration of the organic amine added in the reaction mixture. It is found that ferrierite can be successfully synthesized when the reaction mixtures have the gel compositions: (i) (90-40)DB . Al2O3 . 30SiO(2) . 370H(2)O, (ii) (90-30)ED . Al2O3 .(20-30)SiO2 . 370H(2)O and (iii) (90-40)py . Al2O3 .(30-40)SiO2 . 370H(2)O.