A hydrocracking process integrated with vacuum distillation and solvent dewaxing to reduce heavy polycyclic aromatic buildup

An integrated hydrocracking, vacuum distillation and solvent deasphalting process that provides for controlling the amount of polycyclic aromatic hydrocarbons in a heavy oil recycle stream by separating a portion of the heavy oil recycle stream into various fractions in a vacuum distillation unit, and processing the various fractions in a manner, including solvent deasphalting, that allows for the control of the polycyclic aromatic hydrocarbons in the heavy oil recycle stream. 本发明提供种经过整合的加氢裂解、真空蒸馏以及溶剂脱沥青方法，其供用于控制重油回收流中多环芳香烃的量，所述控制通过以下来进行：在真空蒸馏单元中将所述重油回收流的部分分离成各种馏分，并且以允许控制所述重油回收流中的所述多环芳香烃的方式(包括溶剂脱沥青)处理所述各种馏分。