Processes for selective demethylation and for preparation of catalysts for use therein

Claim 1

A PROCESS FOR PREPARING A CRYSTALLINE ALUMINOSILICATE HAVING SUBSTANTIALLY UNIFORM INTERSTITIAL SPACES AND CONTAINING A METERIAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND NICKEL-CONTAINING MATERIALS AND WHEREIN SUBSTANTIALLY ALL OF SAID MATERIAL IS RESTRICTED TO SAID INTERSTITIAL SPACES, SAID PROCESS COMPRISING: PROVIDING A CRYSTALLINE ALUMINOSILICATE HAVING SUBSTANTIALLY UNIFORM INTERSTITIAL SPACES, SAID ALUMINOSILICATE HAVING IN ITS INTERSTITIAL SPACES AND ON ITS OUTER SURFACES A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND NICKEL-CONTAINING MATERIALS, TREATING SAID ALUMINOSILICATE WITH A REAGENT CAPABLE OF CONVERTING SAID MATERIAL O A NEW FORM SUFFICIENTLY LARGE TO PREVENT IT FROM PASSING BETWEEN SAID INTERSTITIAL SPACES AND SAID OUTER SURFACES AND REMOVING SAID NEW FORM OF SAID MATERIAL WHICH IS ON SAID OUTER SURFACES WITHOUT AT THE SAME TIME REMOVING SAID NEW FORM OF SAID MATERIAL IN SAID INTERSTITIAL SPACES.