METHOD FOR THE SYNTHESIS OF A ZSM-22 ZEOLITE, A METAL CONTAINING ZEOLITE AND ITS APPLICATION IN HYDROMERIZATION OF LONG CHAIN N-PARAFFINS

摘要

The present invention provides a method for preparing a zeolite by hydrothermal heating of silica precursor and alumina precursor along with a combination of two structure-directing organic templates, N,N-dimethyl formamide and 1,6- diaminohexane in the presence of an alkali. The use of two structure-directing organic templates, not only reduces the crystallization time but also enables the preparation of more catalytically active ZSM-22 of submicron crystallite size. The present invention also provides a method of preparing a noble metal containing zeolite catalyst for hydroisomerization of long chain n-paraffins.