Patent ID: 9200218
Filing Date: 2015-12-01
Classification: C10G,C10L

Abstract:
1. A method for producing a naphtha product and an unconverted product, comprising: exposing a feedstock comprising an atmospheric gas oil, a virgin distillate or a hydrotreated virgin distillate having a boiling range in which at least 90 wt % boils above 350° F. to a first hydrocracking catalyst under first effective hydrocracking conditions to form a first hydrocracked effluent, the feedstock having a cetane number of about 35 or less, at least about 60 wt % of the feedstock boiling above about 400° F. (about 204° C.) and at least about 60 wt % of the feedstock boiling below about 650° F. (about 343° C.); exposing the first hydrocracked effluent, without intermediate separation, to a first dewaxing catalyst comprising Pt-ZSM-48 under first effective dewaxing conditions to form a first dewaxed effluent; separating the dewaxed effluent to form a first gas phase portion and a first liquid phase portion; fractionating the first liquid phase portion and a second liquid phase portion in a first fractionator to form at least one naphtha fraction and an unconverted fraction, the naphtha fraction corresponding to at least about 65 wt % of the feedstock and having a final boiling point of about 400° F. (about 204° C.) or less; withdrawing at least a first portion of the unconverted fraction as an unconverted product stream, the weight of the unconverted product stream corresponding to from about 5 wt % to about 35 wt % of the feedstock; wherein the unconverted product stream has an initial boiling point of at least about 400° F. (about 204° C.), a cetane number of at least about 45, and a cloud point at least about 10° F. (about 6° C.) less than the cloud point of the feedstock; exposing at least a second portion of the unconverted fraction to a second hydrocracking catalyst under second effective hydrocracking conditions less severe than the first hydrocracking conditions to form a second hydrocracked effluent; exposing the second hydrocracked effluent, without intermediate separation, to a second dewaxing catalyst under second effective dewaxing conditions to form a second dewaxed effluent; separating the second dewaxed effluent to form a second gas phase portion and the second liquid phase portion; and sending at least a portion of the second liquid phase portion to the first fractionator.