Hydrotreating process

Details Hydrotreating process Hydrotreating process

2007-11-27

2007-11-27

Caldarola, Glenn (Department: 1764)

Mineral oils: processes and products

Refining

Sulfur removal

C208S089000, C208S213000, C208S25400R

Reexamination Certificate

active

10862398

ABSTRACT:
Process for the removal of coloured compounds in a hydrocarbon feedstock comprising the steps of hydrotreating the feedstock in presence of a first hydrotreating catalyst under conditions being effective in hydrogenation of hydrogenable compounds being present in the feedstock and hydrotreating an effluent from the first hydrotreating step in a second catalytic hydrotreating step being carried out in a second hydrotreating reactor at hydrotreating conditions, wherein the effluent from the first hydrotreating step is separated into a gas phase and a mixed gas and liquid phase prior to the second hydrotreating step, and the mixed phase is hydrotreated in the second hydrotreating step without further addition of hydrogen.

REFERENCES:
patent: 4755280 (1988-07-01), Hudson et al.
patent: 5403470 (1995-04-01), Kokayeff et al.
patent: 2002/0148757 (2002-10-01), Huff et al.

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