Patent ID: 8822744

Claim:
A method for producing a low sulfur diesel product, comprising: introducing a feedstock having a T5 boiling point of about 300° F. or greater and containing a biocomponent portion of up to 20% by weight into a first reaction zone; hydtrotreating the feedstock in the first reaction zone under first effective hydrotreating conditions to produce a first hydrotreated feedstock having a sulfur content less than about 2500 ppm by weight, wherein at least 90 wt % of the oxygen is removed from the feedstock; separating the first hydrotreated feedstock into a vapor stream and a liquid stream, the vapor portion containing hydrogen gas; passing at least a portion of first hydrotreated feedstock to a second reaction zone without passing the vapor portion containing hydrogen gas; hydrotreating the portion of the first hydrotreated feedstock in the second reaction zone under second effective hydrotreating conditions to produce a diesel boiling range product.