Platinum catalyst reforming process

Claim 1

IN A NAPHTHA HYDROFORMING SYSTEM WHEREIN HYDROCARBON NAPHTHAS ARE CONTACTED AT HIGH SEVERITIES INCLUDING ELEVATED TEMPERATURE AND PRESSURE IN THE PRESENCE OF A SUPPORTED-PLATNIUM CATALYST, SAID SYSTEM INCLUDING 0 PLURALITY OF REACTORS, A GAS SEPARATION ZONE, AND COMPRESSOR MEANS AND LINES FOR RECYCLING HYDROGEN-RICH SEPARATED GAS TO SAID PLURALITY OF REACTORS, SAID SEPARATED GAS CONTAINING ABOUT 65 TO 85 MOL PERCENT HYDROGEN, THE METHOD OF BRINGING A REACTOR ON-STREAM AT ELEVATED TEMPERATURE WITHOUT FORMING DAMAGING HOT-SPOTS WHICH COMPRISES PURGING SAID REACTOR WITH INERT GAS TO REMOVE OXYGEN THEREFROM, PURGING SAID REACTOR AT REDUCED PRESSURE WITH SUBSTANTIALLY -PURE HYDROGEN CONTAINING ABOVE ABOUT 90 MOL PERCENT HYDROGEN AND AT LEAST ABOUT 95 MOL PERCENT HYDROGEN PLUS METHANE, PRESSURING-UP TO A PRESSURE INTERMEDIATE SAID REDUCED PRESSURE AND SAID ELEVATED PRESSURE WITH SAID SUBSTANTIALLY-PURE HYDROGEN, PRESSURING-UP TO SAID ELEVATED PRESSURE WITH SAID HYDROGEN-RICH SEPARATED GAS,M AND INTRODUCED NAPHTHA VAPORS THEREIN.