Process for making high octane gasoline

A process for simultaneously raising the octane number of a gasoline product stream and improving the cetane number and smoke point of a distillate stream, while increasing the total volume of liquid products obtained from a naphtha boiling range charge stock which process comprises the steps of:

• (a) separating said charge into a natural gasoline stream comprising a lower boiling point stream essentially free of C.sub.7 paraffins and higher boiling hydrocarbons, and a higher boiling point stream essentially free of C.sub.6 paraffins and lower boiling hydrocarbons;
• (b) reacting said higher boiling stream in a reforming reaction zone, at reforming conditions and with a reforming catalyst selected to convert naphthenic hydrocarbons to aromatic hydrocarbons;
• (c) separating the resulting reforming effluent stream to recover an aromatic concentrate and a stream rich in C.sub.7 and higher paraffins;
• (d) separating said paraffin rich stream to recover a light paraffin stream comprising C.sub.8 paraffins and lower boiling hydrocarbons and a middle distillate product stream comprising C.sub.9 and higher boiling hydrocarbons;
• (e) converting at least a portion of the lighter paraffin stream into a high octane gasoline component in a paraffin upgrading zone;
• (f) combining at least a portion of the converted light paraffin stream and the aromatic concentrate with the natural gasoline stream to recover a high octane gasoline product stream.