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: An apparatus is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. Only the hot hydroprocessing effluent is heated in a fired heater prior to product fractionation, resulting in substantial operating and capital savings.

Abstract: A process is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. A net overhead stream from the hot stripper is forwarded to the cold stripper for further stripping. The invention is particularly suitable for hydrotreating residue feed streams. The hot stripped stream may be subjected to fluid catalytic cracking. The apparatus and process eliminates the need for a fired heater in the product recovery unit.

Abstract: Hydrotreating methods and hydrotreating systems are provided herein. In an embodiment, a hydrotreating method includes heating a petroleum-based diesel feed. The heated petroleum-based diesel feed is introduced to a hydrotreating process. An unheated carbonaceous feed is introduced to the hydrotreating process separate from the heated petroleum-based diesel feed. The heated petroleum-based diesel feed and the unheated carbonaceous feed are co-processed in the hydrotreating process. In an embodiment of a hydrotreating system, the hydrotreating system includes a hydrotreating unit, and a heating apparatus, with the heating apparatus heating petroleum-based diesel feed prior to introduction to the hydrotreating unit. The unheated carbonaceous feed source is in fluid communication with the hydrotreating unit for introducing an unheated carbonaceous feed to the hydrotreating unit separate from the petroleum-based diesel feed.

Abstract: An improved apparatus strips HPNA's from hydroprocessed streams in a fractionation column having a split shell configuration. Only one vapor stripping feed is required to the split shell of the fractionation column. The resulting reduction in steam requirement provides a superior fractionation in the column.

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: An apparatus is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. A net overhead stream from the hot stripper is forwarded to the cold stripper for further stripping. The invention is particularly suitable for hydrotreating residue feed streams. The hot stripped stream may be subjected to fluid catalytic cracking. The apparatus and process eliminates the need for a fired heater in the product recovery unit.

Abstract: Dual stripper column arrangements are described in which hot flash drum liquid is sent to one column and cold flash drum liquid is sent to a second column. Methods of operating the dual stripper column apparatus are also described.

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: The present invention is an improved process for stripping HPNA's from hydroprocessed streams in a fractionation column having a split shell configuration. Only one vapor stripping feed is required to the split shell of the fractionation column. The resulting reduction in steam requirement provides a superior fractionation in the column.

Abstract: Hydrotreating methods and hydrotreating systems are provided herein. In an embodiment, a hydrotreating method includes heating a petroleum-based diesel feed. The heated petroleum-based diesel feed is introduced to a hydrotreating process. An unheated carbonaceous feed is introduced to the hydrotreating process separate from the heated petroleum-based diesel feed. The heated petroleum-based diesel feed and the unheated carbonaceous feed are co-processed in the hydrotreating process. In an embodiment of a hydrotreating system, the hydrotreating system includes a hydrotreating unit, and a heating apparatus, with the heating apparatus heating petroleum-based diesel feed prior to introduction to the hydrotreating unit. The unheated carbonaceous feed source is in fluid communication with the hydrotreating unit for introducing an unheated carbonaceous feed to the hydrotreating unit separate from the petroleum-based diesel feed.

Abstract: A process 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 utilize a common overhead recovery apparatus.

Abstract: A process is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. Only the hot hydroprocessing effluent is heated in a fired heater prior to product fractionation, resulting in substantial operating and capital savings.

Abstract: An apparatus is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. Only the hot hydroprocessing effluent is heated in a fired heater prior to product fractionation, resulting in substantial operating and capital savings.

Abstract: A process is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. A net overhead stream from the hot stripper is forwarded to the cold stripper for further stripping. The invention is particularly suitable for hydrotreating residue feed streams. The hot stripped stream may be subjected to fluid catalytic cracking. The apparatus and process eliminates the need for a fired heater in the product recovery unit.

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: An apparatus is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. A net overhead stream from the hot stripper is forwarded to the cold stripper for further stripping. The invention is particularly suitable for hydrotreating residue feed streams. The hot stripped stream may be subjected to fluid catalytic cracking The apparatus and process eliminates the need for a fired heater in the product recovery unit.