Patent ID: 7022637

Claim:
A process for preparing an isomorphically substituted zeolitic catalyst comprising the steps of: selecting an aluminosilicate zeolitic material selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-22, MCM-22, ZSM-23, ZSM-39, ZSM-57, mordenite, Beta, FAU, and L-types; and refluxing, in the presence of NH 4 HF 2 , a slurry of the zeolitic material in the presence of a soluble metal compound selected from the group consisting of metal compounds of Fe, Ga, Ti, and Co and mixtures thereof under conditions effective for substituting aluminum in the aluminosilicate zeolitic material with metal from the soluble metal compound to yield a metal to aluminum ratio of between 1:10 and 3:1.