The integrated desulphurization and denitrification method of dilute fragrant hydrocarbon-fraction is handled including mild hydrogenation

The integrated desulphurization and denitrification method of dilute fragrant hydrocarbon-fraction is handled including mild hydrogenation

  • CN 103,703,107 B
  • Filed: 12/13/2011
  • Issued: 11/09/2018
  • Est. Priority Date: 12/15/2010
  • Status: Active Grant
First Claim
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1. a kind of method of the processing hydrocarbon charging to remove undesirable aromatic hydrocarbon and non-aromatic hydrocarbon organosulfur compound, the hydrocarbon intoMaterial is included in the midbarrel boiled within the scope of 180 DEG C to 400 DEG C, the method includes:

  • By making the hydrocarbon charging and a effective amount of extractant by extraction section, come detach the aromatic hydrocarbon of the hydrocarbon charging atPoint, to generateExtract, most of aromatic contents containing the hydrocarbon charging and a part of extractant, andRaffinate, most of non-aromatic hydrocarbon ingredient containing the hydrocarbon charging and a part of extractant;

    At least most of extractant is detached with the raffinate, and retains dilute fragrant hydrocarbon-fraction;

    The wherein described extractant is selected from and is made of furfural, n-methyl-2-pyrrolidone, dimethylformamide and dimethyl sulfoxide (DMSO)Group;

    At least most of extractant is detached with the extract, and is retained rich in fragrant hydrocarbon-fraction;

    Dilute fragrant hydrocarbon-fraction is set to pass through hydroprocessing processes under mild operating conditions, to reduce sulfur content, the temperatureInclude with operating condition:

    300 DEG C to 400 DEG C of temperature is less than 55 bars of hydrogen partial pressure, 0.5hr-1To 10hr-1Feed rate,With 100 liters of hydrogen of every liter of oil to the hydrogen rate of feed of 500 liters of hydrogen of every liter of oil;

    It described will be contacted with oxidant and oxidation catalyst rich in fragrant hydrocarbon-fraction so that aromatic series organosulfur compound changesAt oxide and the oxidized fragrant hydrocarbon-fraction that is rich in is generated, the molar ratio of the oxidant and sulphur is 1;

    1 to 100;

    1;

    The wherein described oxidation catalyst is selected from the group being made of homogeneous catalyst and heterogeneous catalyst, and includes the periodic table of elementsThe metal of IUPAC 4-10 races;

    Aqueous oxidant and oxidation catalyst is set to be rich in aromatic hydrocarbon fraction seperation with oxidized in decanter vessel;

    It is extracted by solvent counter current and absorption separation aromatic hydrocarbon from the oxidized hydrocarbon-fraction rich in fragrance is organic in adsorption columnThe oxide of sulphur compound;

    By the dilute fragrant hydrocarbon-fraction for having been subjected to the hydroprocessing processes and the oxygen for eliminating aromatic series organosulfur compoundThe oxidized of compound merges rich in fragrant hydrocarbon-fraction;

    WithRecycle the hydrocarbon products having less than 15ppmw sulphur levels.

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