Hydrocarbon reforming system for high sulfur naphthas

Claim 1

THE METHOD OF CONVERTING A FLOW OCTANE NUMBER NAPHTHA CONTAINING MORE THAN .1 PERCENT SULFUR AND RICH IN PARAFFINS AND NAPHTHENES INTO A HIGH OCTANE NUMBER NAPHTHA PRODUCT WHICH METHOD COMPRISES HYDROFINING SAID NAPHTHA BY CONTACTING IT WITH A SULF-ACTIVE HYDROGENATION CATALYST IN THE PRESENCE OF ADDED HYDROGEN UNDER CONDITIONS TO EFFECT DESULFURIZATION, REFORMING SAID HYDROFINED NAPHTHA WITH A PLATINUM-CONTAINING REFORMING CATALYST CONSISTING ESSENTIALLY OF PLATINUM-ON-ALUMINA UNDER CONDITIONS INCLUDING AN INLET TEMPERATURE OF AT LEAST ABOUT 950* F. FOR INCREASING THE OCTANE NUMBER OF SAID NAPHTHA AND PRODUCING HYDROGEN, SEPARATING HYDROGEN FROM THE REFORMING PRODUCT STREAM, RECYCLING A PART OF SAID HYDROGEN TO THE REFORMING STEP, RECYCLING ANOTHER PART OF SAID HYDROGEN TO THE HYDROFINING STEP, PERIODICALLY REGENERATING AT LEAST A PART OF THE PLATINUM-CONTAINING CATALYST WHILE OTHER PARTS OF THE PLATINUM-CONTAINING CATALYST ON-STREAM BY CONTACTING SAID PART OF THE PLATINUM-CONTAINING CATALYST WITH FLUE GAS CONTAINING ADDED OXYGEN TO SUBSTANTIALLY REMOVE CARBONACEOUS DEPOSITS OF COMBUSTION AND THEN CONTACTING THE SUBSTANTIALLY CARBON-FREE CATALYST WITH A GAS HAVING AN OXYGEN PARTIAL PRESSURE OF AT LEAST .4 ATMOSPHERE AT A TEMPERATURE APPROXIMATING THE TEMPERATURE EMPLOYED IN THE REFORMING STEP FOR A TIME SUFFICIENT TO RESTORE THE CATALYST SUBSTANTIALLY TO ITS ORIGINAL ACTIVITY, RECYCLING GAS LEAVING THE REGENERATING STEP THROUGH A TEMPERATURE CONTROL ZONE BACK TO SAID REGENERATING STEP AND EMPLOYING AT LEAST A PART OF THE RECYCLED GAS STREAM FROM THE TEMPERATURE CONTROL ZONE FOR EFFECTING REGENERATION OF A PART OF THE HYDROFINING CATALYST WHILE SAID LAST NAMED CATALYST IN NOT ONE-STREAM.

Claim 2

THE METHOD OF CONVERTING A FLOW OCTANE NUMBER NAPHTHA CONTAINING MORE THAN .1 PERCENT SULFUR AND RICH IN PARAFFINS AND NAPHTHENES INTO A HIGH OCTANE NUMBER NAPHTHA PRODUCT WHICH METHOD COMPRISES HYDROFINING SAID NAPHTHA BY CONTACTING IT WITH A SULF-ACTIVE HYDROGENATION CATALYST IN THE PRESENCE OF ADDED HYDROGEN UNDER CONDITIONS TO EFFECT DESULFURIZATION, REFORMING SAID HYDROFINED NAPHTHA WITH A PLATINUM-CONTAINING REFORMING CATALYST CONSISTING ESSENTIALLY OF PLATINUM-ON-ALUMINA UNDER CONDITIONS INCLUDING AN INLET TEMPERATURE OF AT LEAST ABOUT 950* F. FOR INCREASING THE OCTANE NUMBER OF SAID NAPHTHA AND PRODUCING HYDROGEN, SEPARATING HYDROGEN FROM THE REFORMING PRODUCT STREAM, RECYCLING A PART OF SAID HYDROGEN TO THE REFORMING STEP, RECYCLING ANOTHER PART OF SAID HYDROGEN TO THE HYDROFINING STEP, PERIODICALLY REGENERATING AT LEAST A PART OF THE PLATINUM-CONTAINING CATALYST WHILE OTHER PARTS OF THE PLATINUM-CONTAINING CATALYST ON-STREAM BY CONTACTING SAID PART OF THE PLATINUM-CONTAINING CATALYST WITH FLUE GAS CONTAINING ADDED OXYGEN TO SUBSTANTIALLY REMOVE CARBONACEOUS DEPOSITS OF COMBUSTION AND THEN CONTACTING THE SUBSTANTIALLY CARBON-FREE CATALYST WITH A GAS HAVING AN OXYGEN PARTIAL PRESSURE OF AT LEAST .4 ATMOSPHERE AT A TEMPERATURE APPROXIMATING THE TEMPERATURE EMPLOYED IN THE REFORMING STEP FOR A TIME SUFFICIENT TO RESTORE THE CATALYST SUBSTANTIALLY TO ITS ORIGINAL ACTIVITY, RECYCLING GAS LEAVING THE REGENERATING STEP THROUGH A TEMPERATURE CONTROL ZONE BACK TO SAID REGENERATING STEP AND EMPLOYING AT LEAST A PART OF THE RECYCLED GAS STREAM FROM THE TEMPERATURE CONTROL ZONE FOR EFFECTING REGENERATION OF A PART OF THE HYDROFINING CATALYST WHILE SAID LAST NAMED CATALYST IN NOT ONE-STREAM.