Multi-step catalytic process for conversion of a heavy hydrocarb

Details Multi-step catalytic process for conversion of a heavy hydrocarb Multi-step catalytic process for conversion of a heavy hydrocarb

1997-10-01

2000-01-25

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With subsequent treatment of products

208 89, 208 94, 208100, 208102, 208 93, 208104, L10G 2100

Patent

active

060174412

ABSTRACT:
A process for converting a heavy hydrocarbon fraction comprises treating the hydrocarbon feed in a hydroconversion section in the presence of hydrogen, the section comprising at least one three-phase reactor containing at least one ebullated bed hydroconversion catalyst, operating in liquid and gas riser mode, said reactor comprising at least one means for removing catalyst from said reactor and at least one means for adding fresh catalyst to said reactor. At least a portion of the hydroconverted liquid effluent is sent to an atmospheric distillation zone from which a distillate and an atmospheric residue are recovered; at least a portion of the atmospheric residue is sent to a vacuum distillation zone from which a vacuum distillate and a vacuum residue are recovered; at least a portion of the vacuum residue is sent to a deasphalting section from which a deasphalted hydrocarbon cut and residual asphalt are recovered; and at least a portion of the deasphalted hydrocarbon cut is sent to a hydrotreatment section from which a gas fraction, an atmospheric distillate and a heavier liquid fraction of the hydrotreated feed are recovered by atmospheric distillation separation, said section comprising at least one three-phase reactor containing at least one ebullated bed hvdroconversion catalyst operating in liquid and gas riser mode, the reactor comprising at least one means for extracting catalyst from the reactor and at least one means for adding fresh catalyst to the reactor.

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