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US 2016/0097006 A1Published application
Hydrocracking process integrated with solvent deasphalting to reduce heavy polycyclic aromatic buildup in heavy oil hydrocracker recycle stream
AssigneeShell Oil Company
InventorAristides MACRIS
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Abstract
An integrated hydrocracking and solvent deasphalting process that provides for removal from the heavy oil recycle stream heavy polycyclic aromatic compounds formed in the hydrocracking step and recycling the resulting deasphalted paraffinic oil as a feed to the hydrocracker reactor of the process for further conversion.
Claims6
A hydrocracking process providing for a reduction of the buildup of heavy polyaromatic hydrocarbons in a heavy oil recycle stream of said hydrocracking process, wherein the process comprises:
- (a) hydrocracking in a hydrocracker reactor a heavy feedstock to yield a hydrocracked product that is separated into at least two product streams including said heavy oil recycle stream, comprising a concentration of said heavy poly-aromatic hydrocarbons;
- (b) passing a first portion of said heavy oil recycle stream as a recycle feed to said hydrocracker reactor;
- (c) passing a second portion of said heavy oil recycle stream to a solvent deasphalting unit for separating said heavy poly-aromatic hydrocarbons from said second portion of said heavy oil recycle stream to yield a deasphalted paraffinic oil and a heavy polycyclic aromatics fraction, comprising said heavy poly-aromatic hydrocarbons;
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- (d) passing said deasphalted paraffinic oil as a feed to said hydrocracker reactor.
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Dependencies are inferred from the claim text.