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TWO STAGE HYDROPROCESSING WITH DIVIDED WALL COLUMN FRACTIONATOR

  • US 20120004478A1
  • Filed: 06/24/2011
  • Published: 01/05/2012
  • Est. Priority Date: 06/30/2010
  • Status: Active Grant
First Claim
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1. A method for producing low sulfur distillate products, comprising:

  • hydrotreating a feedstock under first effective hydrotreating conditions;

    fractionating the hydrotreated feedstock in a first volume of a divided wall column fractionator to produce at least a first product fraction, a first bottoms fraction, and a first common fraction that is passed to an upper undivided volume of the fractionator;

    dissolving hydrogen in at least a portion of the first bottoms fraction to approximately the solubility limit;

    hydrocracking the portion of the first bottoms fraction under effective hydrocracking conditions in a hydrocracking stage having a continuous liquid environment; and

    fractionating the hydrocracked first bottoms fraction in a second volume of the divided wall column fractionator to produce at least a second product fraction, a third product fraction, and a second common fraction that is passed to the upper undivided volume of the fractionator,wherein the second product fraction has at least one improved property relative to the first product fraction and the third product fraction has at least one improved property relative to the bottoms fraction.

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