Patent ID: 8591726
Filing Date: 2013-11-26
Classification: B01D,C10G,C10L,Y02P

Abstract:
1. A method for producing low sulfur distillate products, comprising: hydrotreating a feedstock under effective hydrotreating conditions; hydrocracking the hydrotreated feedstock in a first hydrocracking stage under first effective hydrocracking conditions; fractionating the hydrocracked feedstock in a first volume of a divided wall column fractionator to produce at least a first diesel product fraction and a first bottoms fraction; hydrocracking a portion of the first bottoms fraction in a second hydrocracking stage having a continuous liquid environment under second effective hydrocracking conditions; dewaxing the hydrocracked portion of the bottoms fraction in a dewaxing stage having a continuous liquid environment under effective catalytic dewaxing conditions; and fractionating the hydrocracked, dewaxed bottoms fraction in a second volume of the divided wall column fractionator to produce at least a second diesel product fraction and a second bottoms fraction, wherein the second diesel fraction has at least one improved cold flow property relative to the first diesel fraction, and the second bottoms fraction has at least one improved cold flow property relative to the first bottoms fraction.