Hydrocracking process integrated with solvent deasphalting to reduce heavy polycyclic aromatic buildup in heavy oil hydrocracker recycle stream

A hydrocracking process providing for a reduction of the buildup of heavy poly-aromatic hydrocarbons in a heavy oil recycle stream of said hydrocracking process, wherein the process comprises:

• (a) hydrocracking in a hydrocracker reactor a heavy feedstock, which at least 90 weight percent boils at a temperature above 380° C., to yield a hydrocracked product;
• (b) separating said hydrocracked product into at least two product streams including said heavy oil recycle stream, comprising a concentration of said heavy poly-aromatic hydrocarbons and uncoverted hydrocarbons having a boiling temperature of above 380° C.;
• (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;
• (d) passing said deasphalted paraffinic oil as a feed to said hydrocracker reactor;
• wherein the weight ratio of said second portion of said heavy oil recycle stream to said first potion of said heavy oil recycle stream is less than 0.5;
• and
• wherein the concentration of heavy poly-aromatic hydrocarbons in the heavy oil recycle stream is less than 1,000 ppmw.