Hf deasphalting for hydrocracking feed preparation

Claim 1

IN A PROCESS FOR THE PREPARATION OF A HYDROCRACKING FEED AND PRODUCTION OF A HIGH VALUE COKE, THE STEPS WHICH COMPRISE PREFLASHING A CRUDE OIL, THEREBY OBTAINING A LIGHTER FRACTION BOILING BELOW ABOUT 200*F. AND A HEAVIER FRACTION BOILING ABOVE ABOUT 200*F., RECOVERING THE SAID LIGHTER FRACTION, PASSING SAID HEAVIER FRACTION INTO A DEASPHALTING AND DEMETALIZIATION ZONE PASSING HF INTO SAID ZONE FOR CONTACTING SAID HEAVIER FRACTION AND IN A SUFFICIENT AMOUNT TO PRECIPITATE SUBSTANTIALLY ALL METAL FROM SAID HEAVIER FRACTION AND TO FORM AND EXTRACT PHASE WHICH AMOUNTS TO ABOUT 10-20% OF SAID CRUDE OIL FEED IN WHICH ARE CONCENTRATED THE COMPOUNDS CONTAINING SULFUR, NITROGEN AND CONRADSON CARBON AND A SEPARATE RAFFINATE PHASE WHICH AMOUNTS TO ABOUT 80-90% OF SAID CRUDE OIL FEED, SAID PRECIPITATE BEING COLLECTED PRIMARILY IN SAID EXTRACT PHASE, SEPARATING SAID EXTRACT PHASE AND SAID RAFFINATE PHASE, REMOVING SAID EXTRACT PHASE FROM THE SAID DEASPHALTING ZONE, FILTERING SAID EXTRACT PHASE TO REMOVE SAID PRECIPITATE CONTAINING HEAVY METAL CONTAMINANTS, PASSING THE FILTER EXTRACT PHASE INTO A HIGH TEMPERATURE THERMAL CRACKING ZONE, CRACKING THE SAID METAL-FREE EXTRACT SUBSTANIALLY COMPLETELY TO METAL-FREE COKE AND HYDROGEN, RECOVERING SAID COKE AS A PREMIUM LOW METALS COKE, PASSING AT LEAST PART OF THE SAID HYDROGEN INTO A HYDROCRACKING ZONE, FRACTIONATING SAID RAFFINATE PHASE INTO THREE STREAMS, INCLUDING (1) A LIGHTER BOILING STREAM WHICH IS PASSED WITHOUT HYDROFORMING TO A HYDROFORMING ZONE WHERE IT IS HYDROFORMED IN THE PRESENCE OF HYDROGEN GAS, RECYCLING PART OF SAID HYDROGEN GAS FROM SAID HYDROFORMING ZONE TO SAID HYDROCRACKING ZONE, (2) AN INTERMEDIATE STREAM WHICH IS REMOVED FROM THE SYSTEM AS PRODUCT, AND (3) A BOTTOMS STREAM WHICH IS PASSED WITHOUT HYDROFINING INTO THE SAID HYDROCRACKING ZONE CONTAINING A CATALYST COMPRISING PALLADIUM ON AN ALUMINUM SILICATE MOLECULAR SIEVE WHERE IT IS HYDROCRACKED IN THE PRESENCE OF THE RECYCLE HYDROGEN FROM THE SAID HYDROFORMING ZONE AND HYDROGEN FROM SAID THERMAL CRACKING STEP, RECOVERING A LOW BOILING HYDROCRACKATE NAPHTHA FRACTION WHICH IS REMOVED FROM THE SYSTEM AND A HIGHER BOILING HYDROCRACKATE NAPHATHA FRACTION WHICH IS PASSED TO SAID HYDROFORMING ZONE, AND RECOVERING A HIGH QUALITY FUEL FROM THE SAID HYDROFORMING ZONE.