Patent ID: 9534179
Date: 2017-01-03
CPC Classifications: C10G

Claim:
1. A hydrocracking process for treating a first heavy hydrocarbon feedstream and a second heavy hydrocarbon feedstream, the first heavy hydrocarbon feedstream contains undesired nitrogen-containing compounds and poly-nuclear aromatic compounds, the process comprising: a. contacting the first heavy hydrocarbon feedstream and elution solvent with an effective amount of adsorbent material to produce an effluent comprising solvent and an adsorbent-treated heavy hydrocarbon stream having a reduced content of nitrogen-containing and poly-nuclear aromatic compounds, and recovering solvent from the effluent; b. combining the second heavy hydrocarbon feedstream with the adsorbent-treated heavy hydrocarbon stream; c. introducing the combined stream and an effective amount of hydrogen into a hydrocracking reaction unit that contains an effective amount of hydrocracking catalyst to produce a hydrocracked effluent stream; d. fractionating the remainder of the hydrocracked effluent stream to recover hydrocracked products and a bottoms stream containing heavy poly-nuclear aromatic compounds; e. contacting the fractionator bottoms stream with an effective amount of adsorbent material to produce an adsorbent-treated fractionator bottoms stream having a reduced content of heavy poly-nuclear aromatic compounds; f. integrating the adsorbent-treated fractionator bottoms stream with the combined stream of steps (b); and g. introducing the combined stream into the hydrocracking reaction unit.