Abstract: A process for producing alkylaromatic compounds is described. The process involves utilizing at least a portion of the aromatic compound used to regenerate the alkylation catalyst in a spent alkylation reaction zone as a reactant in the active alkylation reaction zone. The process further includes utilizing a portion of the process stream leaving the alkylation zone as a recycle stream to the alkylation zone.

Abstract: Methods and apparatuses for selective hydrogenation of olefins are provided. The method for selective hydrogenation of olefins comprises reacting a hydrocarbonaceous feedstock comprising olefins and aromatic compounds with hydrogen in a reaction zone. The reaction contains a catalyst producing a reaction zone product stream comprising aromatic compounds. The reaction zone product stream is passed to a flash vessel, recovering a first product stream and a second product stream from the flash vessel. The first product stream is passed to a liquid jet eductor, whereas the second product stream comprising aromatic compounds having a reduced concentration of olefins is subsequently recovered.

Abstract: One exemplary embodiment can be a process for treating a hydroprocessing fraction. The process can include obtaining a bottom stream from a fractionation zone, and passing at least a portion of the bottom stream to a film generating evaporator zone for separating a first stream containing less heavy polynuclear aromatic compounds than a second stream.

Abstract: One exemplary embodiment can be a process for treating a hydroprocessing fraction. The process can include obtaining a bottom stream from a fractionation zone, and passing at least a portion of the bottom stream to a film generating evaporator zone for separating a first stream containing less heavy polynuclear aromatic compounds than a second stream.

Abstract: The present invention relates to a hydrotreating process that includes providing a vacuum gas oil stream; heating the vacuum gas oil stream; passing the heated vacuum gas oil stream to a hydrotreating reactor; passing the hydrotreated effluent to a hot separator to form a gas stream and a liquid stream; passing the gas stream to a cold separator to form a heavy liquid stream, a light liquid stream and a vapor stream; and passing the vapor stream to an amine scrubber. Aspects of certain embodiments of the present invention also relate to a hydrotreating process in which the hydrotreating reactor is operated at a pressure within the range of approximately 35-50 kg/cm2g.

Abstract: A hydrotreating reactor including a vessel comprising an upper zone, and intermediate zone and a lower zone. The upper zone comprises at least one upper catalyst bed. The intermediate zone comprises a vapor/liquid separation zone, wherein gas separated within the vapor/liquid separation zone is directed to a high pressure knockout drum and the liquid separated within the vapor/liquid separation zone is directed to a stripping section and then the lower zone. The lower zone comprises at least one lower catalyst bed. Preferably, the stripping section is configured and arranged for removing hydrogen sulfide and ammonia from the gas.

Abstract: Processes and apparatuses for isomerizing hydrocarbons are provided. In an embodiment, a process for isomerizing hydrocarbons includes providing a first hydrocarbon feed that includes hydrocarbons having from 5 to 7 carbon atoms. The first hydrocarbon feed is fractionated to produce a first separated stream that includes hydrocarbons having from 5 to 6 carbon atoms and a second separated stream that includes hydrocarbons having 7 carbon atoms. The first separated stream is contacted with a benzene saturation catalyst at benzene saturation conditions to produce an intermediate stream and subsequently isomerized in the presence of a first isomerization catalyst and hydrogen under first isomerization conditions to produce a first isomerized stream. The second separated stream is isomerized in the presence of a second isomerization catalyst and hydrogen under second isomerization conditions that are different from the first isomerization conditions to produce a second isomerized stream.

Abstract: A shell and tube heat exchanger is described. The shell and tube heat exchanger includes a shell side having a separation plate dividing the shell into at least two compartments, each of the compartments having a feed inlet and a feed outlet; and a tube side comprising a plurality of tubes in the shell, at least one tube in each compartment, and the tube side having an effluent inlet and an effluent outlet. A method of heating a feed stream for a reaction zone using reactor effluent using the shell and tube heat exchanger is also described.

Abstract: Methods for co-processing pyrolysis oil streams and fuel processing apparatuses are provided. In one example, a method for co-processing a pyrolysis oil stream and a hydrocarbon stream is provided. The method includes mixing the pyrolysis oil stream and the hydrocarbon stream with a surfactant to form an emulsion. The method introduces the emulsion to a reaction zone in an fluid catalytic cracking (FCC) unit. The method includes contacting the emulsion with a catalyst in the reaction zone to form an FCC product stream.

Abstract: A process for removing a contaminant from a kerosene stream using a lactamium based ionic liquid is described. The process includes contacting the kerosene stream comprising the contaminant with a lean kerosene-immiscible lactamium ionic liquid to produce a mixture comprising the kerosene and a rich kerosene-immiscible lactamium ionic liquid comprising at least a portion of the removed contaminant; and separating the mixture to produce a kerosene effluent and a rich kerosene-immiscible lactamium ionic liquid effluent comprising the rich kerosene-immiscible lactamium ionic liquid.

Abstract: A separator for separating a hydroprocessed effluent and a process of using same. The separator vessel includes a scrubbing section in a tower to remove acid gases from the vapor that is separated in the separator and that passes upwards through the tower. A treated gas can be recovered from the separator. Additionally, a liquid hydrocarbon stream and a water stream, usually a sour water stream, can be recovered from the separator as well.

Abstract: Processes for hydrotreating a hydrocarbon stream in which a separation zone and a stripping zone is disposed between two hydrotreating reactors. The stripping zone may comprise a portion of the second hydrotreating reactor. The separation zone may comprise two separator vessels. A separator vessel may include the scrubbing zone to receive a scrubbing fluid, for example, steam, hydrogen, or heated effluent, and remove H2S and NH3. A divided wall separator may be used. Vapor from the separator vessels can be recycled in the system.

Abstract: A process for recovering diesel from fractionation column bottoms stream. The bottoms stream from the fractionation column is passed to a vacuum column. The vacuum column includes various packed sections which separate the diesel in the fractionation column bottoms from the other components. The diesel will rise as though the lower sections of the vacuum column, and most will condense in the upper section of the vacuum column. A recovered diesel from the vacuum column can be combined with the diesel recovered from the fractionation column. A venturi jet nozzle, such as a liquid jet eductor, can be used with a sidecut pumparound stream from the fractionation column as a motive fluid to achieve the desired operating pressure of the vacuum column.

Abstract: A process for hydrotreating a coker kerosene feed stream to produce a feed stream for a paraffin separation zone. An effluent stream from a hydrotreating zone is passed to an aromatic separation zone to remove aromatics from the effluent stream form the hydrotreating zone and provide an aromatic lean stream. The aromatic lean stream may be passed to the paraffin separation zone to separate normal paraffins from non-normal paraffins. The separated aromatics can be passed to an aromatic processing zone to, for example, to produce xylene or other desirable aromatic hydrocarbons.

Abstract: Methods and apparatuses for selective hydrogenation of olefins are provided. The method for selective hydrogenation of olefins comprises reacting a hydrocarbonaceous feedstock comprising olefins and aromatic compounds with hydrogen in a reaction zone. The reaction contains a catalyst producing a reaction zone product stream comprising aromatic compounds. The reaction zone product stream is passed to a flash vessel, recovering a first product stream and a second product stream from the flash vessel. The first product stream is passed to a liquid jet eductor, whereas the second product stream comprising aromatic compounds having a reduced concentration of olefins is subsequently recovered.

Abstract: One exemplary embodiment can be a process for hydroprocessing. The process can include providing a hydroprocessing zone having at least two beds, and quenching downstream of a first bed of the at least two beds with a first vacuum gas oil that may be lighter than another vacuum gas oil fed to the first bed.

Abstract: One exemplary embodiment can be a process for hydroprocessing. The process can include providing a hydroprocessing zone having at least two beds, and quenching downstream of a first bed of the at least two beds with a first vacuum gas oil that may be lighter than another vacuum gas oil fed to the first bed.

Abstract: One exemplary embodiment can be a process for washing a gas from a hydroprocessed effluent from a hydroprocessing zone. The process may include adding a first portion of a wash water stream to the hydroprocessed effluent to form a combined stream, condensing the combined stream, adding a first portion of a wash water stream to the effluent to form a combined stream, sending the combined stream to a separator, and providing a second portion of the wash water stream to the tower for washing one or more gases rising in the tower. The separator can include a substantially cylindrical body, in turn, coupled to a boot and a tower.

Abstract: A process for producing alkylaromatic compounds is described. The process involves utilizing at least a portion of the aromatic compound used to regenerate the alkylation catalyst in a spent alkylation reaction zone as a reactant in the active alkylation reaction zone. The process further includes utilizing a portion of the process stream leaving the alkylation zone as a recycle stream to the alkylation zone.

Abstract: One exemplary embodiment can be a process for hydroprocessing. The process can include providing a hydroprocessing zone having at least two beds, and quenching downstream of a first bed of the at least two beds with a first vacuum gas oil that may be lighter than another vacuum gas oil fed to the first bed.