Enhanced heat recovery in paraxylene plants

Enhanced heat recovery in paraxylene plants

  • CN 105,828,899 B
  • Filed: 12/10/2014
  • Issued: 09/24/2021
  • Est. Priority Date: 12/17/2013
  • Status: Active Grant
First Claim
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1. A method for recovering heat in a paraxylene manufacturing plant, the method comprising:

  • providing a first feed stream to a fractionation column, wherein the feed stream comprises C8 aromatics;

    supplying heat to a reboiler of the fractionation column to separate the feed stream into an overhead product comprising benzene, a bottom product comprising C9+ aromatics, a liquid sidedraw product comprising xylene, and a vapor sidedraw product comprising xylene;

    withdrawing vapor sidedraw product from the fractionation column through a vapor sidedraw outlet below the first feed stream and recovering heat from the vapor sidedraw product by condensing the vapor sidedraw product using a side condenser, wherein the side condenser is located below the first feed stream, andwithdrawing liquid sidedraw product from the fractionation column through a liquid sidedraw outlet above the vapor sidedraw outlet.

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