Two-stage pretreatment of reformer charge naphtha

Claim 1

IN THE METHOD OF PREPARING A HYDROCARBON MIXTURE BOILING IN THE BOILING RANGE OF NAPHTHA AND CONTAINING IN EXCESS OF 25 P.P.M. OF NITROGEN FOR REFORMING IN THE PRESENCE OF NITROGEN-SENSITIVE PARTICLE-FORM SOLID REFORMING CATALYST WHEREIN A FIRST STATIC BED OF NITROGENAND SULFUR-INSENSITIVE PARTICLE-FORM SOLID HYDROGENATING CATALYTIC MATERIAL IS ESTABLISHED IN A SECONDARY HYDRODECONTAMINATOR, WHEREIN A SECOND STATIC BED OF NITROGENAND SULFUR-INSENSITIVE PARTICLE-FORM SOLID HYDROGENATING CATALYTIC MATERIAL IS ESTABLISHED IN A PRIMARY HYDRODECONTAMINATOR, WHEREIN A FIRST NAPHTHA CONTAINING IN EXCESS OF 25 P.P.M. OF NITROGEN IS INTRODUCED INTO SAID SECONDARY HYDRODECONTAMINATOR AND INTIMATELY CONTACTED THEREIN WITH THE AFORESAID FIRST STATIC BED OF HYDROGENATING CATALYTIC MATERIAL AT A LIQUID HOURLY SPACED VELOCITY IN THE RANGE OF ABOUT 1 TO ABOUT 10, WHEREIN HYDROGEN IS INTRODUCED INTO SAID SECONDARY HYDRODECONTAMINATOR AND FLOWS THERETHROUGH AT A RATE IN THE RANGE OF ABOUT 500 TO ABOUT 2500 S.C.F. PER BARREL OF THE AFORESAID FIRST NAPHTHA, WHEREIN HYDRODECONTAMINATING CONDITIONS OF TEMPERATURE IN THE RANGE OF ABOUT 600* TO ABOUT 850*F. AND A TOTAL PRESSURE OF ABOUT 200 TO ABOUT 1000 P.S.I.G. ARE MAINTAINED IN THE AFORESAID SECONDARY HYDRODECONTAMINATOR, WHEREIN IN SECONDARY HYDRODECONTAMINATOR EFFLUENT COMPRISING AMMONIA, HYDROGEN SULFIDE, HYDROGEN, AND C1 AND HEAVIER HYDROCARBONS IS WITHDRAWN FROM SAID SECONDARY HYDRODECONTAMINATOR, WHEREIN THE WHOLE OF SAID SECONDARY HYDRODECONTAMINATOR EFFLUENT IS MIXED WITH A SECOND NAPHTHA