Removal of sulphur compounds from hydrocarbon streams using adsorbents and regeneration of the loaded adsorbents

  • US 7,517,389 B2
  • Filed: 10/29/2003
  • Issued: 04/14/2009
  • Est. Priority Date: 10/29/2002
  • Status: Expired due to Fees
First Claim
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1. A process for removing water and sulfur compounds from a hydrocarbon stream containing water and sulfur compounds selected from the group consisting of hydrogen sulfide, carbonyl sulfides, mercaptans, especially C1-C6 mercaptans, organic disulfides, especially di-C1-C4-alkyl sulphides, organic disulfides, especially di-C1-C4-alkyl disulfides, thiophene compounds, aromatic mercaptans, especially phenyl mercaptan, and mixtures thereof, wherein the total amount of said sulfur compounds contained in the hydrocarbon stream is up to 3 vol %, based on total hydrocarbon stream, by adsorbing at least 60 wt % of the water contained in said hydrocarbon stream therefrom onto a first zeolite having a pore diameter of less than 5 Å

  • ; and

    thereafter, contacting said hydrocarbon stream with an adsorbent comprising a second zeolite having a pore diameter of at least 5 Å

    to adsorb the sulfur compounds thereon to thereby provide a loaded adsorbent, followed by a regeneration of said loaded adsorbent in the presence of water by contacting said loaded adsorbent with a regeneration gas stream comprising an inert gas or an inert gas mixture having a relative humidity of between 5% and 60%, said regeneration being conducted at a temperature of between 200 and 400°

    C. and a pressure between 30 and 120 bara, whereby an absorbent having significantly reduced degradation/ageing is obtained.

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