NaZSM-48 has been synthesized successfully in a pure solid system of Na 2 O-SiO 2 -Al 2 O 3 -H 2 N(CH 2 ) 6 NH 2 . This method greatly increased the yield of products and decreased the pollution of waste liquid. XRD patterns and data of the as-synthesized sample closely matched those of ZSM-48 synthesized hydrothermally. The sample was also examined with SEM, t.g.-d.t.a., and i.r.; and the crystallization kinetics in the system was studied. The results showed that both the hexan-1,6-diamine (HEXDM) content and the autoclave type greatly influenced the crystallization. FrameworkFT i.r. bands of the as-synthesized ZMS-48 were shifted toward lower frequencies than those of ZSM-48 synthesized in aqueous and nonaqueous systems.