Hydrocarbon conversion catalyst composition

A hydrocarbon conversion process, comprising:

• contacting a hydrocarbon feedstock, having a 10% distillation point of 200° C. or higher, with a hydrocarbon conversion catalyst under hydrocarbon conversion conditions, including a contacting temperature in the range of from 100 to 600° C. and a contacting pressure in the range of from 1 to 100 bara;
• wherein said hydrocarbon conversion catalyst comprises a dealuminated extrudate and a catalytic metal selected from the group consisting of platinum, palladium, and nickel;
• wherein said dealuminated extrudate includes an extrudate comprising ZSM-48 and/or EU-2 zeolite particles present in an amount to provide a zeolite content of said hydrocarbon conversion catalyst composition of at least 20 wt % and at most 70 wt % and silica binder that includes both silica sol and silica powder containing silica particles having a mean diameter between 10 μm and 200 μm, and wherein said ZSM-48 and/or EU-2 zeolite particles in said extrudate before its dealumination have a bulk silica-to-alumina molar ratio (SAR) of at least 150 and at most 210, and wherein said silica binder is essentially free of alumina;
• and, wherein said extrudate is dealuminated after being dried and calcined to provide said dealuminated extrudate that is followed by incorporation of said catalytic metal into said dealuminated extrudate;
• and wherein the average aluminium concentration of the ZSM-48 and/or EU-2 zeolite particles is at least 1.1 times the aluminium concentration at the surface of the particles;
• and
• yielding a hydrocarbon feedstock conversion product.