Abstract
Unicracking-JHC is a modern regenerative fixed-bed catalytic process for selectively converting high boiling hydrocarbons such as virgin, steam cracked and coker gas oils and catalytic cycle oils to lower boiling products-gasoline, jet fuel and diesel oils-with a net consumption of hydrogen. Various conversion levels are possible including total conversion to gasoline and lighter. With complete conversion, liquid yield of 120-130 volume percent of feed are common.
Unicracking-JHC process utilizes a high activity catalyst which has excellent activity maintenance in the presence of nitrogen and sulfur compounds. Typical reaction temperatures are 500-800°F and operating pressures range from 800-2, 000 psi, exact conditions being fixed by feed stock propeties and processing objectives. Either singlestage or two-stage hydrocraking may be employed. The choice depends on feed rate, feedproperties, processing objectives. For most stocks, recent technological develop-ments permit economic conversion to gasoline and lighter products in a single stage.
Eight Unicracking-JHC units totaling 90, 000 BPSD of capacity are now on stream, and other units under construction or announced will bring the total to about 200, 000 BPSD by the end of 1968.
