Selective Conversion of Paraffinic Naphtha to Propylene in the Presence of Hydrogen

A process of catalytic conversion by hydrocracking of paraffinic and naphthenic hydrocarbons from a naphtha feedstock to propylene, the process being characterized in that it comprises the following steps:

• a) providing a naphtha feedstock containing one or more paraffins comprising 4 to 10 carbon atoms;
• and
• b) submitting said naphtha feedstock to a hydrocracking step by contacting said naphtha feedstock with a catalyst composition in the presence of hydrogen in a reaction zone under hydrocracking conditions to produce an effluent;
• c) submitting the effluent to a separation step to recover propane;
• and
• d) submitting said propane to a step of dehydrogenation into propylene in a propane dehydrogenation reactor;
• e) collecting hydrogen produced in the step of dehydrogenation into propylene, and recycling said hydrogen back to the hydrocracking reaction zone in order to perform the hydrocracking step;
• and in that the catalyst composition of the hydrocracking step comprises one or more zeolite catalysts comprising one or more acid 10-membered ring channels.