Desulfurization and conversion of a naphtha

Claim 1

A CYCLIC PROCESS FOR THE CONVERSION OF A HIGH SULFUR CONTENT NAPHTHA TO A MOTOR FUEL OF INCREASED AROMATIC CONTENT AND ANTI-KNOCK QUALITY AND SUBSTANTIALLY FREE FROM SULFUR IN ANY FORM, WHICH COMPRISES PASSING SUCH A HYDROCARBON FEED STOCK AT A PASS VELOCITY IN EXCESS OF FIVE MILIGRAMS PER SQUARE CENTIMETER PER SECOND IN THE PRESENCE OF ADDED HYDROGEN IN CONTACT WITH A CATALYST COMPRISING MOLYBDENUM OXIDE AT A TEMPERATURE BETWEEN ABOUT 850 AND ABOUT 1050*F., A PRESSURE BETWEEN ABOUT 30 AND ABOUT 450 POUNDS PER SQUARE INCH, WITHIN A TIME FACTOR RANGE OF ABOUT 0.1 TO ABOUT 25, SUCH THAT THE NAPHTHA FEED STOCK IS CONVERTED TO ONE OF INCREASED AROMATIC CONTENT AND SUBSTANTIALLY ALL OF THE SULFUR IS COMBINED WITH THE CATALYST TO PRODUCE AN EFFLUENT SUBSTANTIALLY FREE FROM SULFUR IN ANY FORM, MAINTAINING THE QUANTITY OF HYDROGEN ADDED AND THE PRESSURE WITHIN LIMITS INSUFFICIENT TO CAUSE A NET CONSUMPTION OF HYDROGEN, CONTINUING CONTACT OF SUCH A NAPHTHA WITH THE CATALYST FOR A PERIOD OF TIME NOT LONGER THAN THAT REQUIRED FOR THE SULFUR CONTENT OF THE EFFLUENT TO RISE SHARPLY, THEREAFTER DISCONTINUING CONTACT OF SUCH A NAPHTHA AND REGENERATING THE SPENT CATALYST BY CONTACT WITH AN OXYGEN-CONTAINING GAS AT AN ELEVATED TEMPERATURE TO REMOVE COMBINED SULFUR FROM SAID CATALYST, AND REPEATING THE ABOVE CYCLE WITH SAID REGENERATED CATALYST.