Patent ID: 8551327

Claim:
A method for producing a low sulfur diesel product, comprising: hydrotreating a mineral hydrocarbon feedstock having an initial boiling point of about 300° F. or greater and an initial sulfur level of at least about 50 ppm by weight in a first reaction zone under effective hydrotreating conditions to produce a treated mineral hydrocarbon feedstock having a sulfur content greater than about 10 ppm but less than about 50 ppm by weight; mixing the treated mineral hydrocarbon feedstock with a biocomponent feedstock to produce a combined feedstock, the biocomponent feedstock comprising up to about 20% by weight of the combined feedstock; and hydrotreating the combined feedstock in a second reaction zone under effective hydrotreating conditions to produce a diesel boiling range product having a sulfur content of about 10 ppm by weight or less, wherein the diesel boiling range product is stripped to remove has phase impurities.