초록 ▼

An integrated residuum hydroconversion process which includes a residuum hydrotreater and a desulfurized oil hydrocracker produces high quantities of high quality middle distillate fuels. Distillate range products from the residuum hydrotreater are hydrocracked, while catalyst fouling from heavy aro

An integrated residuum hydroconversion process which includes a residuum hydrotreater and a desulfurized oil hydrocracker produces high quantities of high quality middle distillate fuels. Distillate range products from the residuum hydrotreater are hydrocracked, while catalyst fouling from heavy aromatics present in the hydrotreated products is minimized. The process includes a single hydrogen supply and recovery loop for increased cost and energy savings.

대표청구항 ▼

[ What is claimed is:] [1.] An integrated hydroconversion process comprising:a) contacting a residuum feedstock with a hydrogen-rich gaseous stream in a hydrotreating reaction zone to form a hydrotreated liquid product having reduced asphaltene content and a gaseous hydrotreater effluent;b) fraction

[ What is claimed is:] [1.] An integrated hydroconversion process comprising:a) contacting a residuum feedstock with a hydrogen-rich gaseous stream in a hydrotreating reaction zone to form a hydrotreated liquid product having reduced asphaltene content and a gaseous hydrotreater effluent;b) fractionating the hydrotreated liquid product in a first fractionation zone to recover at least a desulfurized VGO fraction;c) contacting a VGO feed with a gaseous hydrocracker feed stream in a hydrocracking reaction zone, at hydrocracking conditions sufficient to effect a boiling range conversion of the VGO feed, to produce at least the hydrogen-rich gaseous stream and a liquid hydrocrackate;d) passing the hydrogen-rich gaseous stream to the hydrotreating reaction zone for contacting with the residuum feedstock;e) fractionating the liquid hydrocrackate in a second fractionation zone to recover at least a VGO product stream; andf) combining the desulfurized VGO fraction with at least a portion of VGO product stream to form the VGO feed for contacting in the hydrocracking reaction zone.