Process for hydrotreating a hydrocarbon feedstock and...

Details Process for hydrotreating a hydrocarbon feedstock and... Process for hydrotreating a hydrocarbon feedstock and...

2005-03-22

2005-03-22

Tran, Hien (Department: 1764)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

C422S187000, C422S186220, C208S20800M, C208S209000

Reexamination Certificate

active

06869576

ABSTRACT:
A process for hydrotreating a hydrocarbon feedstock (1) involving the use of at least one hydrotreatment, particularly hydrodesulfurization, reactor (2) and a fractionation unit (3), which latter contains two distinct injection zones (4, 5) for the hydrocarbon feedstocks, a common zone (8) of vaporization of the light fractions and two distinct draw-off lines (6, 7) for the liquid bottoms; the hydrocarbon feedstock (1) being subjected to a preliminary treatment either in a first hydrodesulfurization reactor (20) the operating conditions of which (P, T, LHSV) may be different from those of the hydrotreatment reactor (2), or in a sweetening apparatus or else in a sulfur trap, the hydrocarbon feedstock being then injected into the first injection zone (4) of the fractionation unit (3), the liquid bottoms being removed through the draw-off line (6) of the injection zone (4) and passed into a hydrotreatment reactor (2), the effluents from said reactor (2) being injected into a second injection zone (5) of the fractionation unit (3), the light fractions leave the common zone (8) through an evacuation line (11), and the heavy liquid bottoms of the second injection zone (5) being removed through the corresponding draw-off line (7). Also apparatus for carrying out this process.

REFERENCES:
patent: 1707349 (1929-04-01), Egloff
patent: 3314879 (1967-04-01), Lacy et al.
patent: 3437584 (1969-04-01), Hamblin
patent: 3519557 (1970-07-01), Pruiss
patent: 3544428 (1970-12-01), Mellbom
patent: 3591489 (1971-07-01), Adams et al.
patent: 5705052 (1998-01-01), Gupta
patent: 5720872 (1998-02-01), Gupta

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