Co-processing of diesel biofeed and kerosene range hydrocarbons

摘要

Processes are provided for producing a diesel fuel product having a sulfur content of 10 ppm by weight or less from feed sources that include up to 50% by weight of a biocomponent feedstock. The biocomponent feedstock is co-processed with a heavy oil feed in a severe hydrotreating stage. The product from the severe hydrotreatment stage is fractionated to separate out a diesel boiling range fraction, which is then separately hydrotreated.

主权项

1. A method for producing a low sulfur diesel product, comprising:
filtering a diesel boiling range biocomponent portion; forming a blended feedstock containing both a mineral portion and from about 0.1 wt % to about 50 wt % of the diesel boiling range biocomponent portion, the mineral portion having a boiling range from about 125° C. to about 300° C.; and hydrotreating the blended feedstock under effective hydrotreating conditions wherein the effective hydrotreating conditions include hydrodesulfurization and hydrodeoxygenation conditions which include an LHSV of 0.5 to 1.5 hr−1, a hydrogen partial pressure from about 100 to about 500 psig, a treat as rate of less than about 3000 scf/b of at least 80% hydrogen (remainder inert gas), and a temperature of from about 500-750° F., to produce a liquid phase product stream; and dewaxing the liquid phase product stream by contacting the liquid phase product stream with a dewaxing catalyst under dewaxing conditions which include a temperature from 280 to 380° C. (536 to 716° F.), a pressure from 30 to 3000 psig, an LHSV from 0.1 to 5.0 hr−1, and a treat gas rate from 500 to 5000 scf/b to produce a diesel fuel product.