Selectivated metallosilicate catalyst composite for alkyl aromatic conversion, process for the preparation thereof, use thereof in hydrocarbon conversion

An improved process for alkylaromatic hydrocarbon conversion with high selectivity comprising:

• (i) contacting a mixture of a hydrocarbon feed with a selectivated catalyst under the conditions effective to convert said hydrocarbon feed to a hydrocarbon product different from said hydrocarbon feed, wherein said improvement depends from the production of the selectivated catalyst by a process comprising the steps of:
• a) contacting and treating an intermediate pore metallosilicate with an organosilicon compound in a solvent for a specific duration and then recovering the solvent;
• b) combining and reacting the organosilicon compound treated metallosilicate with a volume of water, and then drying the catalyst;
• c) repeating the steps a) and b) above;
• and
• d) calcining the catalyst in an oxygen containing atmosphere sufficient to remove the organic material and deposit siliceous matter on the metallosilicate;
• wherein in said process calcining step d) is a final step after silanation completion, which is not repeated after each step a) and b).