High pressure thermal cracking and fluid coking

• US 2,873,244 A
• Filed: 08/23/1955
• Issued: 02/10/1959
• Est. Priority Date: 08/23/1955
• Status: Expired due to Term

• Current Assignee: Charles E. Hemminger
• Original Assignee: Charles E. Hemminger
• Inventors: Hemminger, Charles E.
• Application Number:
  US03/529,988
• Time in Patent Office: 1,267 Days
• US Class Current: 208/50
• CPC Class Codes: C10G 9/00 Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils

Claims

2. A PROCESS FOR PYROLYTICALLY UPGRADING A LONG RESIDUM CONTAINING APPRECIABLE AMOUNTS OF 700 TO 1000* F. VIRGIN GAS OIL AND HAVING A CONRADSON CARBON IN THE RANGE OF 2 TO 15 WT. PERCENT OBTAINED BY THE ATMOSPHERIC DISTILLATION OF A WHOLE CRUDE, WHICH COMPRISES THE STEPS OF:

COMBINING SAID LONG RESIDUM WITH A SOLIDS FREE HEAVY RESIDUAL FRACTION OBTAINED AS HEREINAFTER DESCRIBED, THERMALLY CRACKING THE RESULTING ADMIXTURE IN LIQUID PHASE IN A THERMAL CRACKING ZONE AT A TEMPERATURE IN THE RANGE OF 850 TO 95* F. AND A PRESSUR IN THE RANGE OF 100 TO 1000 P. S. I. DISTILLING THE RESULTING CRACKED PRODUCTS TO SEGREGATE AN OVERHEAD GAS OIL BOILING BELOW ABOUT 930* F. AND A HEAVY BOTTOMS FRACTION;

PASSING SAID OVERHEAD GAS OIL DIRECTLY TO A SCRUBBING-FRACTIONATION ZONE;

INJECTING SAID HEAVY BOTTOMS FRACTION INTO A BODY OF FLUIDIZED INERT PARTICULATE SOLIDS MAINTAINED AT A COKING TEMPERATURE OF 850 TO 1200* F. IN A SEPARATE FLUID COKING REACTION ZONE;

CIRCULATING SAID PARTICULATE SOLIDS THROUGH AN EXTERNAL HEATING ZONE AND BACK TO SAID FLUID COKING REACTION ZONE TO MAINTAIN SAID COKING TEMPERATURE;

PASSING THE RESULTANT VAPORS FROM SAID FLUID COKING REACTION ZONE DIRECTLY TO SAID SCRUBBING-FFRACTIONATION ZONE;

RECOVERING PRODUCT FRACTIONS FROM SAID SCRUBBING-FRACTIONATION ZONE AND TWO HEAVY RESIDUAL FRACCTIONS BOILING PREDOMI NANTLY ABOVE 1000* F. ONE OF SAID HEAVY RESIDUAL FRACTIONS CONTAINING COKE FINES ENTRAINED FROM SAID FLUID COKING REACTION ZONE WITH SAID VAPORS;

COMBINING THE SUBSTANTIALLY SOLIDS FREE HEAVY RESIDUAL FRACTION WITH SAID LONG RESIDUUM, AND RECYCLING THE OTHER COKE FINE CONTAININGING HEAVY RESIDUAL FRACTION TO SAID COKING ZONE.