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Slurry oil upgrading while preserving aromatic content

  • US 9,375,656 B2
  • Filed: 06/19/2014
  • Issued: 06/28/2016
  • Est. Priority Date: 01/09/2009
  • Status: Active Grant
First Claim
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1. A process for producing needle coke from slurry oil, comprising:

  • a) providing a slurry oil comprising aromatic compounds, nitrogen containing compounds and sulfur-containing compounds;

    b) contacting the slurry oil with a chromatography substrate that retains at least a portion of the nitrogen-containing compounds, thereby producing an upgraded slurry oil;

    c) hydrotreating the upgraded slurry oil at a pressure in the range from 1 to 350 psig with a hydrodesulfurization catalyst to remove sulfur-containing compounds from the upgraded slurry oil, thereby producing a needle coke precursor comprising less than about 0.5 percent (by weight) sulfur-containing compounds, wherein the hydrotreating is performed at a temperature that preserves at least 70 percent of the aromatic compounds comprising at least three aromatic rings that were originally present in the slurry oil feedstock;

    d) converting the needle coke precursor to needle coke in a coking system.

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