Process for removing refractory nitrogen compounds from vacuum gas oil

摘要

A process for removing a refractory nitrogen compound from a hydroprocessed vacuum gas oil feed includes contacting the hydroprocessed vacuum gas oil feed comprising the nitrogen compound with a VGO immiscible phosphonium ionic liquid to produce a hydroprocessed vacuum gas oil and VGO immiscible phosphonium ionic liquid mixture and separating the mixture to produce a hydroprocessed vacuum gas oil effluent having a reduced refractory nitrogen compound content relative to the vacuum gas oil feed.