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Hydroconversion multi-metallic catalyst and method for making thereof

  • US 8,575,061 B2
  • Filed: 10/18/2011
  • Issued: 11/05/2013
  • Est. Priority Date: 11/11/2010
  • Status: Active Grant
First Claim
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1. A process for forming a hydroprocessing catalyst composition, the method comprises:

  • co-precipitating at reaction conditions at least a Group VIB metal precursor feed and at least a Promoter metal precursor feed selected from Group VIII, Group IIB, Group IIA, Group IVA and combinations thereof, to form a mixture comprising a catalyst precursor, wherein the reaction conditions comprise a temperature between 25-350°

    C. and a pressure between 0 to 3000 psig and a pH of 0-12;

    isolating the catalyst precursor from the mixture, forming a supernatant containing at least a Promoter metal residual and at least a Group VIB metal residual in a total amount of at least 10 mole % of metal ions in the metal precursor feeds;

    contacting the supernatant with an ion exchange resin for a sufficient amount of time for at least 50 mole % of metal ions in the metal residuals to be bound onto the resin, forming a first effluent stream containing unbound metal residuals;

    eluting the resin to produce an eluate stream containing the metals ions previously bound onto the resin;

    treating the first effluent stream or the eluate stream to recover at least 80 mol % of metal ions in the stream to form at least a metal precursor feed;

    recycling the metal precursor feed to the co-precipitating step; and

    sulfiding the catalyst precursor forming the bulk catalyst.

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