Abstract: A hot stripped hydroprocessed stream from a stripper column may be sent directly to a vacuum fractionation column instead of being first processed in an atmospheric fractionation column. If a separate warm stripper column is used, both the warm stripped stream and a hot stripped stream may be fractionated in the same fractionation column, particularly a vacuum fractionation column.

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: Embodiments of apparatuses and methods for reforming of hydrocarbons are provided herein. In one example, a method comprises burning fuel gas to form a hot flue gas and heat a reforming-zone feedstock that contains (C5-C11) hydrocarbons to form a heated reforming-zone feed stream. The heated reforming-zone feed stream is partially reformed to form a partially reformed effluent. The partially reformed effluent is advanced through a process heat recovery coil arrangement that is recovering heat from the hot flue gas to form a heated partially reformed effluent. The heated partially reformed effluent is contacted with reforming catalyst at reforming conditions effective to form a reforming reaction-zone effluent. The reforming reaction-zone effluent comprises H2, C5+ hydrocarbons including aromatics, and C4? hydrocarbons.

Abstract: Methods and apparatuses for processing hydrocarbon streams are provided. In an embodiment, a method for processing a hydrocarbon stream includes heating a feed stream in a convective bank. In the method, the feed stream is reacted in a first reaction zone to form a first effluent. The first effluent is heated in a first radiant cell that combusts fuel gas to heat the first effluent and forms a first exhaust gas. The method includes contacting the first exhaust gas with the convective bank to heat the feed stream.

Abstract: A process and apparatus provides for blending a heavy naphtha stream with a diesel stream to increase the yield of diesel. The diesel stream is recovered separately from a kerosene stream to leave the kerosene stream undiminished. The blended diesel provides a valuable composition.

Abstract: A hot stripped hydroprocessed stream from a stripper column may be sent directly to a vacuum fractionation column instead of being first processed in an atmospheric fractionation column. If a separate warm stripper column is used, both the warm stripped stream and a hot stripped stream may be fractionated in the same fractionation column, particularly a vacuum fractionation column.

Abstract: Two or three strippers are used to strip three hydroprocessed effluent streams, perhaps from a slurry hydrocracking reactor, separated by temperature instead of a single stripper to preserve separations previously made and conserving energy and reducing vessel size. A cold stripped stream may be taken as a diesel blending stock without further fractionation.

Abstract: A hot stripped hydroprocessed stream from a stripper column may be sent directly to a vacuum fractionation column instead of being first processed in an atmospheric fractionation column. If a separate warm stripper column is used, both the warm stripped stream and a hot stripped stream may be fractionated in the same fractionation column, particularly a vacuum fractionation column.

Abstract: A process and apparatus provides for blending a heavy naphtha stream with a diesel stream to increase the yield of diesel. The diesel stream is recovered separately from a kerosene stream to leave the kerosene stream undiminished. The blended diesel provides a valuable composition.

Abstract: A process and apparatus provides for blending a heavy naphtha stream with a diesel stream to increase the yield of diesel. The diesel stream is recovered separately from a kerosene stream to leave the kerosene stream undiminished. The blended diesel provides a valuable composition.

Abstract: Two or three strippers are used to strip three hydroprocessed effluent streams, perhaps from a slurry hydrocracking reactor, separated by temperature instead of a single stripper to preserve separations previously made and conserving energy and reducing vessel size. A cold stripped stream may be taken as a diesel blending stock without further fractionation.

Abstract: An aromatics complex producing one or more xylene isomers offers a large number of opportunities to conserve energy by heat exchange within the complex. One previously unrecognized opportunity is through providing two parallel distillation columns operating at different pressures to separate C8 aromatics from C9+ aromatics. The parallel columns offer additional opportunities to conserve energy within the complex through heat exchange in associated xylene recovery facilities.

Abstract: Method and apparatuses for producing ethylene and propylene from naphtha feedstock are provided. The naphtha feedstock includes a first component consisting of hydrocarbons that have less than or equal to five carbon atoms and a second component. The second component consists of at least one of an isoparaffin component having at least six carbon atoms, a naphthene component having at least six carbon atoms, or an aromatic component having at least six carbon atoms. The naphtha feedstock is separated to produce a first separation stream including the first component and a second separation stream including the second component. At least a portion of the second component from the second separation stream is converted to normal paraffins. Normal paraffins from conversion of the second component and at least a portion of the first component or derivative thereof from the first separation stream are steam cracked to produce ethylene and propylene.

Abstract: A process is disclosed for recovering product from catalytically converted product streams. An integrated debutanizer column provides an LPG stream, a light naphtha stream and a heavy naphtha stream. The integrated debutanizer column may comprise a dividing wall column. The light naphtha stream may be used as an absorbent for a primary absorber column which provides advantageous operation.

Abstract: An apparatus is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. The cold stripper and the hot stripper utilize a common overhead recovery apparatus.

Abstract: An apparatus is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. The cold stripper and the hot stripper are contained in the same vessel. A barrier prevents material from the hot stripper from entering into the cold stripper.

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: Apparatus for controlling the operation of fractionation columns to avoid column flooding is described. The apparatus uses mass flow meters to measure the mass flow rates of the receiver vapor, and the stripper hydrocarbon liquid stream or the stripper reflux and the stripper net overhead liquid. The water from the receiver can be measured with either a volumetric flow meter or a mass flow meter. The apparatus also includes at least one computer in communication with a molecular weight analyzer or specific gravity analyzer; an overhead vapor line pressure gauge; an overhead vapor line temperature gauge; a hydrocarbon liquid outlet line temperature gauge; the stripper hydrocarbon stream mass flow meter, or the stripper reflux hydrocarbon liquid mass flow meter and the stripper net overhead hydrocarbon liquid mass flow meter; the vapor mass flow meter; and the water flow meter.

Abstract: Methods for controlling the operation of fractionation columns to avoid column flooding are described. The methods use mass flow meters to measure the mass flow rates of the receiver vapor, and the stripper hydrocarbon liquid or stripper reflux and stripper net overhead. The water from the receiver can be measured with either a volumetric flow meter or a mass flow meter. A computer can be used to determine the dew point from the mass flows, and an alarm can be triggered and/or a process change can be made if the difference between the calculated dew point and the temperature of the overhead vapor stream is less than a predetermined amount.

Abstract: An aromatics complex producing one or more xylene isomers offers a large number of opportunities to conserve energy by heat exchange within the complex. One previously unrecognized opportunity is through providing two parallel distillation columns operating at different pressures to separate C8 aromatics from C9+ aromatics. The parallel columns offer additional opportunities to conserve energy within the complex through heat exchange in associated xylene recovery facilities.