Patent ID: 8840864

Claim:
A method of preparing ZSM-5, comprising: providing a nanocrystalline ZSM-5 seed having a size of about 70 about 150 nm from organic structure-inducing material, a silica source and an alumina source, adding the nanocrystalline ZSM-5 seed to a stock solution including water glass as a silica source, an alumina source, a neutralizer and water to form a reaction mixture, wherein the solution has a composition represented by [Na 2 O] X [Al 2 O 3 ] Y [SiO 2 ] 100 [H 2 O] Z in which X is about 10 to about 26 (mole), Y is about 0.2 to about 5 (mole), and Z is about 2500 to about 4000 (mole); and maintaining the reaction mixture at about 150 to about 200° C. to crystallize the reaction mixture.