Method of improving front end octane rating and increasing "lpg" production

Claim 1

A METHOD OF REFORMING MAPTHA CONTAINING NAPTHENES AND PARAFFINS WHICH COMPRISES IN A FIRST AND DEHYDROGENATION OF STAGE CONTACTING DEHEXANIZED CHARGE NAPTHA COMPRISING NAPTHENES AND PARAFFINS HAVING AN IBP IN THE RANGE OF ABOUT 180*F. TO ABOUT 200*F. AND AN EBP IN THE RANGE OF 380*F. TO 420*F. IN THE PRESENCE OF HYDROGEN WITH PLATINUM-GROUP METAL REFORMING CATALYST AT MAPTHENE-DEHYDROGENATING CONDITIONS OF VAPOR INLET TEMPERATURE IN THE RANGE OF ABOUT 800* TO ABOUT 1,050*F., OF PRESSURE IN THE RANGE OF ABOUT 500 TO ABOUT 1,200 P.S.I.G., AND OF LIQUID HOURLY SPACE VELOCITY OF AT LEAST ABOUT 0.5, OBTAINING DEHYDROGENATION STAGE REACTION PRODUCTS COMPRISING HYDROGEN AND C1 AND HEAVIER HYDROCARBONS, THE C5 AND HEAVIER PORTION OF THE AFORESAID C1 AND HEAVIER HYDROCARBONS CONTAINING NOT MORE THAN ABOUT TWO TO ABOUT TEN PERCENT OF THE NAPTHENES OF THE AFORESAID DEHEXANIZED CHARGE NAPTHA, IN A SECOND STAGE CONTACTING SUBSTANTIALLY ALL OF THE AFORESAID DEHYDROGENATION STAGE REACTION PRODUCTS WITH NON-NOBLE METAL SULFIDE CATALYST AT A PRESSURE IN THE RANGE OF ABOUT 500 TO ABOUT 1,500 P.S.I.G., AT A VAPOR INLET TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1,100*F., AND AT A LIQUID HOURLY SPACE VELOCITY OF AT LEAST 0.5, AND RECOVERING (1) REFORMER GAS COMPRISING HYDROGEN, (2) LIQUID PETROLEUM GAS COMPRISING C3 AND C4 HYDROCARBONS AND (3) C5 AND HEAVIER HYDROCARBONS HAVING AN OCTANE RATING AT LEAST 15 OCTANE UNITS HIGHER THAN THE OCTANE RATING (RESEARCH&3CC. TEL) OF SAID DEHEXANIZED CHARGE NAPTHA OF WHICH C5 AND HEAVIER HYDROCARBONS THE C5 TO 220*F. (TBP) FRACTIONS HAS AN OCTANE RATING ABOUT FOUR OCTANE NUMBERS HIGHER THAN THE OCTANE RATING (RESEARCH&3 CC. TEL) OF THE C5 TO 220*F. (TBP) FRACTION OF CONVENTIONALLY PRODUCED C5 TO 380*F PLATINUM REFORMATE.

Claim 2

A METHOD OF REFORMING MAPTHA CONTAINING NAPTHENES AND PARAFFINS WHICH COMPRISES IN A FIRST AND DEHYDROGENATION OF STAGE CONTACTING DEHEXANIZED CHARGE NAPTHA COMPRISING NAPTHENES AND PARAFFINS HAVING AN IBP IN THE RANGE OF ABOUT 180*F. TO ABOUT 200*F. AND AN EBP IN THE RANGE OF 380*F. TO 420*F. IN THE PRESENCE OF HYDROGEN WITH PLATINUM-GROUP METAL REFORMING CATALYST AT MAPTHENE-DEHYDROGENATING CONDITIONS OF VAPOR INLET TEMPERATURE IN THE RANGE OF ABOUT 800* TO ABOUT 1,050*F., OF PRESSURE IN THE RANGE OF ABOUT 500 TO ABOUT 1,200 P.S.I.G., AND OF LIQUID HOURLY SPACE VELOCITY OF AT LEAST ABOUT 0.5, OBTAINING DEHYDROGENATION STAGE REACTION PRODUCTS COMPRISING HYDROGEN AND C1 AND HEAVIER HYDROCARBONS, THE C5 AND HEAVIER PORTION OF THE AFORESAID C1 AND HEAVIER HYDROCARBONS CONTAINING NOT MORE THAN ABOUT TWO TO ABOUT TEN PERCENT OF THE NAPTHENES OF THE AFORESAID DEHEXANIZED CHARGE NAPTHA, IN A SECOND STAGE CONTACTING SUBSTANTIALLY ALL OF THE AFORESAID DEHYDROGENATION STAGE REACTION PRODUCTS WITH NON-NOBLE METAL SULFIDE CATALYST AT A PRESSURE IN THE RANGE OF ABOUT 500 TO ABOUT 1,500 P.S.I.G., AT A VAPOR INLET TEMPERATURE IN THE RANGE OF ABOUT 800 TO ABOUT 1,100*F., AND AT A LIQUID HOURLY SPACE VELOCITY OF AT LEAST 0.5, AND RECOVERING (1) REFORMER GAS COMPRISING HYDROGEN, (2) LIQUID PETROLEUM GAS COMPRISING C3 AND C4 HYDROCARBONS AND (3) C5 AND HEAVIER HYDROCARBONS HAVING AN OCTANE RATING AT LEAST 15 OCTANE UNITS HIGHER THAN THE OCTANE RATING (RESEARCH&3CC. TEL) OF SAID DEHEXANIZED CHARGE NAPTHA OF WHICH C5 AND HEAVIER HYDROCARBONS THE C5 TO 220*F. (TBP) FRACTIONS HAS AN OCTANE RATING ABOUT FOUR OCTANE NUMBERS HIGHER THAN THE OCTANE RATING (RESEARCH&3 CC. TEL) OF THE C5 TO 220*F. (TBP) FRACTION OF CONVENTIONALLY PRODUCED C5 TO 380*F PLATINUM REFORMATE.