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INTEGRATED HYDROTREATING AND ISOMERIZATION PROCESS WITH AROMATIC SEPARATION

  • US 20130062256A1
  • Filed: 07/27/2012
  • Published: 03/14/2013
  • Est. Priority Date: 07/29/2011
  • Status: Active Grant
First Claim
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1. A method of processing a hydrocarbon feed to reduce the concentration of undesired organosulfur compounds comprising:

  • subjecting the hydrocarbon feed to a mild hydrotreating process effective toconvert labile organosulfur compounds andproduce a hydrotreated effluent containing converted compounds and unconverted sterically hindered refractory aromatic organosulfur compounds;

    separating the hydrotreated effluent into an aromatic-lean fraction that is recovered as a hydrotreated hydrocarbon product and an aromatic-rich fraction that contains sterically hindered refractory aromatic organosulfur compounds;

    contacting the aromatic-rich fraction with an isomerization catalyst in the presence of hydrogen to remove steric hindrance of certain compounds and produce an isomerized effluent including isomerate and any remaining unreacted hydrogen; and

    recycling at least a portion of the isomerized effluent to the hydrotreating zone.

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