Maximize Transportation Fuels by Integrating Resid FCC with the H-Oil Process
Publication Date: 2012-Jun-05
The IP.com Prior Art Database
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MAxIMlzETRANSPORTATION F'UELS BYLNTEGRATING r i
RESID FCC WlTH THE H-OIL PROCESS
L. I. Wisdom and R.Ragsdale
forpresentation at the JapanPetroleum Institute Tokyo, Japan
October 18 - 19,1990
Recent research completed by TheM. W. Kellogg Company confinned the ability to achievetotal resid destruction by integrating the H-Oil*and Resid FCC technologies. By combining these technologies, a number of advantages are provided to the refiner, including feedstock flexibility,highproduction of gasoline and diesel, and the ability to shift the product mix.
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There are several processing routes that allow a refiner to achieve total resid but few offer the feedstock flexibility, high yield of transportation fuels
of anH-Oil Unit in comb' tion witharesid Huid Catalytic Cracking Unit. M.W. Kellogg Company ha@ canidout aseries of researchprogramsto c o n k n
the viabilityand establish a firm data base forthisprocess configuration.
In considering options to modernize a refinery processing sweet crudes to,sour crudes, the refiner-ically focG:bn the disposition of the high sulfur vacuum residue. In Japan,manyrefiners havedecided onadding atmospheric residue desulfurizationfollowed by resid catalyticcracking asa viable method for bothdes ' 'onandconversion. In
a cases where thereis existingvacuum distillation,vacuum =dfurization
one whioh prba4ssa
catalyticcracking, the problembecomes oneof treating the vacuumresidueandrevamping the FCC Unit to nhandle heavier feeds.
HRI and Kellogg examined two cases for a refiner. First, processing the virginvacuum residuein a low conversion H-Oil Plant with theunconverted vacuum bottoms routed to the resid FCC Unit. The second case is similarto thefirst case in thatthe unconverted H-Oil residue is routed to the resid FCCUnit, but the H-Oil Plant is operated at higher conversion level in order to m;udmize mid-distillate! production and reduce the feedrate to the resid FCC Unit.
0 II. INTEGRATION OFH-OIL ANDRESID FCCUNITS
Based on a 50/50 blend of Arab Light andArab Heavycrudes, two cases were evaluated whereby 96,095 bpsd of atmospheric bottoms (698"F+)is fed to a vacuum distillation unit. A block flow diagram of thisprocessing schemeis shown in Figure 1. The virgin
is hydrotreated alongwith the H-Oil VGO, then combined with the unconverted H-Oil Bottoms andsent to the resid FCC Unit If there is no spare capacityin the existing VGO hydrotreater, then the H-Oil VGO can be blended with the virgin VGO after hydrotreating.
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An analysis of thw+feedstoCksto the process unitsis shown in Table 1. Depending upon the availability of hydrogen, size of the revamped resid FCC, as well as product demand &e. relative production of gasoline and diesel)the refiner might vary the H-Oil Conversion level to fit into their specific requirements.
An overview of the two cases is presented below:
Low cow. H-Oil High conv. H-Oil Resid FCC Resid F...