INTEGRATED HYDROCRACKING AND SLURRY HYDROCONVERSION OF HEAVY OILS

摘要

Improved yields of fuels and/or lubricants from a resid or other heavy oil feed can be achieved using slurry hydroconversion to convert at least about 90 wt % of the feed. The converted portion of the feed can then be passed into one or more hydroprocessing stages. An initial processing stage can be a hydrotreatment stage for additional removal of contaminants and for passivation of high activity functional groups that may be created during slurry hydroconversion. The hydrotreatment effluent can then be fractionated to separate naphtha boiling range fractions from distillate fuel boiling range fractions and lubricant boiling range fractions. At least the lubricant boiling range fraction can then be hydrocracked to improve the viscosity properties. The hydrocracking effluent can also be dewaxed to improve the cold flow properties. The hydrocracked and/or dewaxed product can then be optionally hydrofinished.

主权项

1. A method for processing a heavy oil feedstock, comprising:
providing a heavy oil feedstock having a 5 wt % boiling point of at least about 650° F. (343° C.) and a first Conradson carbon residue wt %; exposing the heavy oil feedstock to a catalyst under effective slurry hydroconversion conditions to form at least a first liquid product, the effective slurry hydroconversion conditions being effective for conversion of at least about 90 wt % of the heavy oil feedstock relative to a conversion temperature; hydrotreating the first liquid product under effective hydrotreating conditions to form a first hydrotreated liquid product; fractionating the first hydrotreated liquid product to form one or more naphtha boiling range products, one or more distillate fuel boiling range products, and one or more lubricating base oil boiling range products; and hydrocracking at least a portion of the one or more lubricating base oil boiling range products to form at least one hydrocracked fuel product and a hydrocracking bottoms product.