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Systems and methods for hydroprocessing heavy oil

  • US 10,118,146 B2
  • Filed: 11/17/2016
  • Issued: 11/06/2018
  • Est. Priority Date: 04/28/2004
  • Status: Active Grant
First Claim
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1. A system for preparing and conditioning a heavy oil feedstock for hydroprocessing in a hydroprocessing system, comprising:

  • a catalyst precursor;

    a hydrocarbon diluent;

    a heavy oil feedstock separate from the hydrocarbon diluent;

    a first mixing vessel configured for receiving and mixing the catalyst precursor with the hydrocarbon diluent below a temperature at which a significant portion of the catalyst precursor decomposes to form a diluted precursor mixture comprising mixture products of the catalyst precursor and the hydrocarbon diluent;

    a second mixing vessel, downstream from the first mixing vessel, configured for receiving and mixing the diluted precursor mixture with the heavy oil feedstock without heating to a temperature at which a substantial portion of the catalyst precursor decomposes to form a conditioned feedstock comprising mixture products of the catalyst precursor, the hydrocarbon diluent, and the heavy oil feedstock; and

    a heater, downstream from the second mixing vessel and upstream from a hydroprocessing reactor and/or that comprises the hydroprocessing reactor, and which heats the conditioned feedstock and decompose the catalyst precursor so that metal from the decomposed catalyst precursor reacts with sulfur in the heated feedstock to form metal sulfide catalyst particles in situ within the heated feedstock.

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